Name

MIYASHITA, Masashi

Official Title

Associate Professor

Affiliation

(School of Sport and Sciences)

Profile

Our research interests are in the physiology and nutrition of physical activity and public health, with an interest in both the basic science of physical activity and the applied aspects that relate to health in physical activity. Much of our work has examined the effects of physical activity on risk factors for cardiovascular disease. A major focus of our research has concerned the effects of physical activity on fat (triacylglycerol) metabolism after meals in humans. More recently our activities have expanded to include work on physical activity and appetite regulation, physical activity and atherogenic lipids/inflammatory markers, nutrition and physical performance, and football science. We also have an established network with our domestic/international collaborators for conducting cutting-edge research on physical activity and health.

Contact Information

Mail Address

Mail Address
m.miyashita@waseda.jp

Address・Phone Number・Fax Number

Address
2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan

Sub-affiliation

Sub-affiliation

Faculty of Sport Sciences(Graduate School of Sport Sciences)

Research Council (Research Organization)/Affiliated organization(Global Education Center)

Affiliated Institutes

ヒューマンパフォーマンス研究所

研究所員 2017-2021

早稲田バイオサイエンスシンガポール研究所

研究所員 2017-

スポーツ栄養研究所

研究所員 2016-2018

スポーツ栄養研究所

研究所員 2018-

Educational background・Degree

Educational background

-2001/07 Loughborough University Department of Physical Education, Sports Science and Recreation Managemen
-2002/12 Loughborough University School of Sport and Exercise Sciences
-2006/12 Loughborough University School of Sport and Exercise Sciences

Degree

Ph.D. Loughborough University

Career

2006/10-2009/09University of TsukubaGraduate School of Comprehensive Human SciencesResearch Fellow
2009/10-2012/03Waseda UniversityFaculty of Sport SciencesAssistant Professor
2012/04-2016/03Tokyo Gakugei UniversityDepartment of Health and Sports SciencesAssociate Professor
2016/04-Waseda UniversityFaculty of Sport SciencesAssociate Professor

Academic Society Joined

American College of Sports Medicine Member

Japanese Society of Physical Fitness and Sports Medicine Fellow

Japan Atherosclerosis Society Member

Japan Society of Health Promotion Fellow

European College of Sport Science Member

Japan Sports Nutrition Association Member

Japan Society of Human Growth and Development Member

Japan Society for Mastication Science and Health Promotion Member

Korean Society of Exercise Physiology Fellow

British Association of Sport and Exercise Sciences Member

Japanese Association of School Health Member

OfficerCareer(Outside the campus)

2018/07-Minato-ku, Tokyo Metropolitan City, After School Activity Committee
2017/11-Minato-ku, Tokyo Metropolitan City, Dietary Education CommitteeMember
2016/07-Japan Sports Nutrition Association International Committee
2015/09-Japanese Society of Physical Fitness and Sports MedicineEditorial Committee
2015/09-Japanese Society of Physical Fitness and Sports MedicineProgramme Committee
2015/04-Japan Society of Health PromotionFellow
2015/01-Korean Society of Exercise PhysiologyAn international board director
2014/09-Japanese Society of Physical Fitness and Sports MedicineInternational Committee
2013/09-2015/03Japanese Society of Physical Fitness and Sports MedicineConflict of Interest Committee
2011/09-Japanese Society of Physical Fitness and Sports MedicineFellow

Award

The 31st Japanese Society of Physical Fitness and Sports Medicine, Young Investigator Award

2018/08Conferment Institution:Japanese Society of Physical Fitness and Sports Medicine

Title:The associations between physical fitness and body fatness in blood lipid profile in Japanese children and adolescents

Award Winner(Group):Kidokoro T, Edamoto K. Yanaoka T, Kashiwabara K, Tanaka H, Miyashita M.

Best Paper Award (Oral Presentation)

2018/08Conferment Institution:2018 The Society of Chinese Scholars on Exercise Physiology and Fitness & 2018 The Society of Taiwan Scholars on Exercise Physiology and Fitness

Title:The effects of masticatory frequency on appetite and energy metabolism assessed by 13C-labelling technique in healthy young men

Award Winner(Group):Hamada Y, Yanaoka T, Kashiwabara K, Yamamoto R, Suzuki K, Miyashita M.

The 5th Annual Congress of Japan Sports Nutrition Association. 2018 Young Investigator Award.

2018/07Conferment Institution:Japan Sports Nutrition Association

Title:Effect of two weeks of tea catechin-rich beverage intake on 3000-meter time-trial performance

Award Winner(Group):Yamagami J, Miyashita M, Kidokoro T, Yanaoka T, Kashiwabara K, Wakisaka T, Matsui Y, Takeshita M, Osaki N, Katsuragi Y.

The 28th General Meeting of Japanese Society for Mastication Science and Health Promotion. Oral Presentation Award.

2018/02Conferment Institution:Japanese Society for Mastication Science and Health Promotion

Title:Effects of gum chewing on physical and physiological functions during walking

Award Winner(Group):Hamada Y, Yanaoka T, Kashiwabara K, Kurata K, Yamamoto R, Kanno S, Ando T, Miyashita M.

The 2nd International Academic Exchange Awards of the Japanese Society of Physical Fitness and Sports Medicine

2017/09Conferment Institution:Japanese Society of Physical Fitness and Sports Medicine

Title:The effect of different durations of half-time re-warm up on the subsequent sprint performance

Award Winner(Group):Yanaoka T, Masuda Y, Yamagami J, Kashiwabara K, Kurata K, Kidokoro T, Miyashita M, Hirose N.

The 1st International Academic Exchange Awards of the Japanese Society of Physical Fitness and Sports Medicine

2016/09Conferment Institution:Japanese Society of Physical Fitness and Sports Medicine

Title:The associations between physical activity of various intensities and health-related physical fitness in Japanese adolescents

Award Winner(Group):Kidokoro T, Yanaoka T, Kashiwabara K, Yamagami J, Tanaka H, Miyashita M.

The 1st International Academic Exchange Awards of the Japanese Society of Physical Fitness and Sports Medicine

2016/09Conferment Institution:Japanese Society of Physical Fitness and Sports Medicine

Title:Interrupting prolonged sitting time with short walks attenuates postprandial lipaemia in postmenopausal women

Award Winner(Group):Miyashita M, Edamoto K, Kidokoro T, Yanaoka T, Kashiwabara K, Takahashi M, Burns SF.

2015 Young Investigator Award (Mini-Oral 1st place).

2015/06Conferment Institution:European College of Sport Science

Title:Associations between various intensities of physical activity and physical fitness in adolescents

Award Winner(Group):Kidokoro T, Yanaoka T, Kashiwabara K, Yamagami J, Tanaka H, Miyashita M.

2014 Young Investigator Award

2014/08Conferment Institution:Japanese Society of Science and Football

Title:Movement patterns and exercise intensity during football games: football referee versus assistant referee

Award Winner(Group):Hasegawa M, Miyashita M.

Poster Presentation Award

2013/03Conferment Institution:Japanese Society of Health Promotion

Title:Effect of the brown rice diet on oxidative stress

Award Winner(Group):Hirakawa K, Nakamura S, Hata K, Inayama K, Miyashita M, Nagasawa J, Nakata Y, Oka J, Ohkawara K.

2013 Young Investigator Award.

2013/02Conferment Institution:Japanese Society of Physical Fitness and Sports Medicine

Title:Acute effect of increased participation in activities of daily living on postprandial lipaemia in postmenopausal women

Award Winner(Group):Masashi Miyashita

Poster Presentation Award

2011/10Conferment Institution:The 2011 International Conference of Exercise for 3Qs

Title:Associations between health-related physical fitness and obesity among 10-18 years Taiwanese students

Award Winner(Group):Liao Y, Chang S-H, Chen J-F, Wen L-T, Miyashita M, NakamuraY.

2010 Young Investigator Award.

2010/02Conferment Institution:Japanese Society of Physical Fitness and Sports Medicine

Title:Thirty minutes of aerobic exercise reduces postprandial capillary triacylglycerol concentrations in centrally obese middle-aged men

Award Winner(Group):Masashi Miyashita

Butterfield Awards for UK-Japan collaboration in medicine and health

2007/01Conferment Institution:The Great Britain Sasakawa Foundation

Title:Effects of exercise on gut hormones, appetite and energy intake

Award Winner(Group):Masashi Miyashita

2018 WASEDA RESEARCH AWARD(High-Impact Publication)

2019/02Conferment Institution:Waseda University

Award Winner(Group):Msashi Miyashita

Research Field

Keywords

Physical activity,Energy metabolism,Postprandial metabolism,Antiatherogenic,Adolescent health,Physical Fitness,Appetite,Appetite-regulating hormones,Exercise performance,Functional foods,Conditioning,Recovery

Paper

The effects of gum chewing while walking on physical and physiological functions

Hamada Y, Yanaoka T, Kashiwabara K, Kurata K, Yamamoto R, Kanno S, Ando T, Miyashita M.

Journal of Physical Therapy Science Peer Review Yes 30p.625 - 6392018/04-2018/04

Different Patterns of Walking and Postprandial Triglycerides in Older Women

Kashiwabara, Kyoko; Kidokoro, Tetsuhiro; Yanaoka, Takuma; Yanaoka, Takuma; Burns, Stephen F.; Stensel, David J.; Miyashita, Masashi

Medicine and Science in Sports and Exercise 50(1) p.79 - 872018/01-2018/01

DOIScopus

Detail

ISSN:01959131

Outline:© 2017 by the American College of Sports Medicine. Purpose: Although a single bout of continuous exercise (Q30 min) reduces postprandial triglyceride (TG), little evidence is available regarding the effect of multiple short (e10 min) bouts of exercise on postprandial TG in individuals at increased risk for cardiovascular diseases. This study compared the effects of different patterns of walking on postprandial TG in postmenopausal, older women with hypertriglyceridemia. Methods: Twelve inactive women (mean age T SD, 71 T 5 yr) with hypertriglyceridemia (fasting TG Q1.70 mmolILj1) completed three, 1-d laboratory-based trials in a random order: 1) control, 2) continuous walking, and 3) multiple short bouts of walking. On the control trial, participants sat in a chair for 8 h. For the walking trials, participants walked briskly in either one 30-min bout in the morning (0900-0930 h) or twenty 90-s bouts over 8 h. Except for walking, both exercise trials mimicked the control trial. In each trial, participants consumed a standardized breakfast (0800 h) and lunch (1100 h). Venous blood samples were collected in the fasted state and at 2, 4, 6, and 8 h after breakfast. Results: The serum TG incremental area under the curve was 35% and 33% lower on the continuous and multiple short bouts of walking trials than that on the control trial (8.2 T 3.1 vs 8.5 T 5.4 vs 12.7 T 5.8 mmol per 8 hILj1, respectively; main effect of trial: effect size = 0.459, P = 0.001). Conclusions: Accumulating walking in short bouts limits postprandial TG in at-risk, inactive older women with fasting hypertriglyceridemia.

Acute effect of exercise intensity and duration on acylated ghrelin and hunger in men

Broom, David R.; Broom, David R.; Miyashita, Masashi; Miyashita, Masashi; Wasse, Lucy K.; Pulsford, Richard; Pulsford, Richard; King, James A.; King, James A.; Thackray, Alice E.; Stensel, David J.

Journal of Endocrinology 232(3) p.411 - 4222017/01-2017/01

DOIScopus

Detail

ISSN:00220795

Outline:© 2017 Society for Endocrinology Printed in Great Britain.Acute exercise transiently suppresses the orexigenic gut hormone acylated ghrelin, but the extent to which exercise intensity and duration determine this response is not fully understood. The effects of manipulating exercise intensity and duration on acylated ghrelin concentrations and hunger were examined in two experiments. In experiment one, nine healthy males completed three, 4-h conditions (control, moderate-intensity running (MOD) and vigorous-intensity running (VIG)), with an energy expenditure of ~2.5 MJ induced in both MOD (55-min running at 52% peak oxygen uptake (VO2peak)) and VIG (36-min running at 75% VO2peak). In experiment two, nine healthy males completed three, 9-h conditions (control, 45-min running (EX45) and 90-min running (EX90)). Exercise was performed at 70% VO2peak. In both experiments, participants consumed standardised meals, and acylated ghrelin concentrations and hunger were quantified at predetermined intervals. In experiment one, delta acylated ghrelin concentrations were lower than control in MOD (ES = 0.44, P = 0.01) and VIG (ES = 0.98, P < 0.001); VIG was lower than MOD (ES = 0.54, P = 0.003). Hunger ratings were similar across the conditions (P = 0.35). In experiment two, delta acylated ghrelin concentrations were lower than control in EX45 (ES = 0.77, P<0.001) and EX90 (ES = 0.68, P<0.001); EX45 and EX90 were similar (ES = 0.09, P = 0.55). Hunger ratings were lower than control in EX45 (ES = 0.20, P = 0.01) and EX90 (ES = 0.27, P = 0.001); EX45 and EX90 were similar (ES = 0.07, P = 0.34). Hunger and delta acylated ghrelin concentrations remained suppressed at 1.5 h in EX90 but not EX45. In conclusion, exercise intensity, and to a lesser extent duration, are determinants of the acylated ghrelin response to acute exercise.

Participation Report on the International Session at the 71st Annual Meeting of the Japanese Society of Physical Fitness and Sports Medicine

Japanese Journal of Physical Fitness and Sports Medicine 66(1) p.124 - 1242017-2017

CiNii

Interrupting prolonged sitting with short bouts of walking attenuate postprandial triglycerides in normotriglyceridemic and hypertriglyceridemic, postmenopausal women

Kashiwabara Kyoko;Edamoto Kanako;Miyashita Masashi

Japanese Journal of Physical Fitness and Sports Medicine 66(1) p.74 - 742017-2017

CiNii

The associations between physical fitness and body fatness with blood lipid profile in Japanese children and adolescents

Kidokoro Tetsuhiro;Edamoto Kanako;Yanaoka Takuma;Kashiwabara Kyoko;Tanaka Hideto;Miyashita Masashi

Japanese Journal of Physical Fitness and Sports Medicine 66(4) p.271 - 2822017-2017

CiNii

Detail

ISSN:0039-906X

Outline:

The purpose of the present study was to examine the associations between physical fitness and body fatness with blood lipid profile in 231 Japanese children and adolescents (12.1 ± 1.5 years). The primary outcomes of the present study were a lipid risk score which was calculated by summing up z scores of three lipid items (triglycerides, low density lipoprotein-cholesterol, and high density lipoprotein-cholesterol). Physical fitness was assessed by using the Japanese standardised fitness test. For body fatness, a percentage of overweight was calculated with using age-, sex-, height-specific standardised body mass. For combined analysis (fitness × fatness), the participants were cross-tabulated into four groups (Non-Obese/Higher-Fit, Non-Obese/Lower-Fit, Obese/Higher-Fit, and Obese/Lower-Fit). The results demonstrated that the participants in fitness categories A/B [most fit] and C [middle] demonstrated the lower (better) lipid risk score than the participants in fitness categories D/E [least fit] (F (2, 222) = 6.03, p = .003). For body fatness, the lipid risk score in obese group was significantly higher (worse) than that in thin and normal groups (F (2, 222) = 6.08, p = .004). The combined analysis showed that there was a significant interaction (fitness × fatness) on the lipid risk score (F (1, 221) = 4.05, p = .047), suggesting that Obese/Lower-Fit group had the worst risk score compared to the other groups. The present study suggests that improving both fitness and body fatness might be important for better lipid profile in Japanese children and adolescents.

Comparison of Mobility Functions Evaluated by the Locomotive Syndrome Risk Test between Ground Golf Players and Community-Dwelling Older Adults

KASHIWABARA Kyoko;KIDOKORO Tetsuhiro;YAMAGAMI Jumpei;MIYASHITA Masashi

Rigakuryoho kagaku 32(4) p.583 - 5872017-2017

CiNii

Detail

ISSN:1341-1667

Outline:[Purpose] The aims of this study were to investigate the locomotive function and physical strength of ground golf (GG) players. [Subjects and Methods] The subjects were 508 community-dwelling older adults who participated in a health survey. [Results] Compared with the control group (ORs: 1.00) of both males and females, the GG players group showed a lower odds ratio (males, 0.324; females, 0.315) of locomotive syndrome risk level 1 (decline in locomotive function has already begun). The odds ratio (0.277) of locomotive syndrome risk level 2 (decline in locomotive function is already advanced) was also low among males. Even in the 2-step test, the GG players group showed higher values than the control group. [Conclusion] GG players have a lower risk of being judged as having locomotive syndrome risk levels 1 and 2 than elderly people of the same age.

Effect of different methods of active recovery after high-intensity exercise on intermittent exercise performance of soccer referees

Yanaoka Takuma;Kidokoro Tetsuhiro;Edamoto Kanako;Kashiwabara Kyoko;Yamagami Jumpei;Miyashita Masashi

The Journal of Physical Fitness and Sports Medicine 6(5) p.335 - 3422017-2017

CiNii

Detail

Outline:

This study aimed to examine the effect of different methods of active recovery (AR) after high-intensity exercise on exercise performance, determined with the Yo-Yo Intermittent Recovery Test level 2 (Yo-Yo IR2) in soccer referees. Using a crossover design, fourteen male soccer referees completed three trials. After resting for 10 min, participants ran approximately 495 meters (m) at 80% of maximum heart rate (HRmax) and, ran approximately 165 m at 90% of HRmax. This was followed by 15 min of passive recovery (control), 15 min of running at 130 beats/min (continuous AR), or 15 min of intermittent AR consisting of alternating 2.5 min intervals of passive recovery and running at 130 beats/min, repeated for 15 min (intermittent AR). Finally, participants performed the Yo-Yo IR2. Blood lactate and salivary cortisol concentrations were determined immediately after the rest, high-intensity exercise, recovery intervention and Yo-Yo IR2 periods. The Profile of Mood States (POMS) Questionnaire was measured after rest and Yo-Yo IR2. Yo-Yo IR2 performance was significantly higher in the intermittent AR trial than in the control trial. Blood lactate concentrations were significantly lower in the continuous and intermittent AR trials than in the control trial after the recovery intervention. No significant between-trial differences were observed in salivary cortisol concentrations. The fatigue score using the POMS increased significantly during the control and continuous AR trials, but not during the intermittent AR trial. In conclusion, AR with intermittent exercise after high-intensity exercise increases Yo-Yo IR2 performance compared to passive recovery.

Sex-specific associations of moderate and vigorous physical activity with physical fitness in adolescents

Kidokoro, T.; Tanaka, H.; Naoi, K.; Ueno, K.; Yanaoka, T.; Kashiwabara, K.; Miyashita, M.

European Journal of Sport Science p.1 - 82016/05-2016/05

DOIScopus

Detail

ISSN:17461391

Outline:© 2016 European College of Sport ScienceThe present study examined the sex-specific associations of moderate and vigorous physical activity (VPA) with physical fitness in 300 Japanese adolescents aged 12–14 years. Participants were asked to wear an accelerometer to evaluate physical activity (PA) levels of various intensities (i.e. moderate PA (MPA), 3–5.9 metabolic equivalents (METs); VPA, ≥6 METs; moderate to vigorous PA (MVPA), ≥3 METs). Eight fitness items were assessed (grip strength, bent-leg sit-up, sit-and-reach, side step, 50 m sprint, standing long jump, handball throw, and distance running) as part of the Japanese standardised fitness test. A fitness composite score was calculated using Japanese fitness norms, and participants were categorised according to their score from category A (most fit) to category E (least fit), with participants in categories D and E defined as having low fitness. It was found that for boys, accumulating more than 80.7 min/day of MVPA may reduce the probability of low fitness (odds ratio (ORs) [95% confidence interval (CI)] = 0.17 [0.06–0.47], p = .001). For girls, accumulating only 8.4 min of VPA could reduce the likelihood of exhibiting low fitness (ORs [95% CI] = 0.23 [0.05–0.89], p = .032). These results reveal that there are sex-specific differences in the relationship between PA and physical fitness in adolescents, suggesting that sex-specific PA recommendation may be needed to improve physical fitness in adolescents.

Changes in gastrointestinal hormones: The roles of mastication and exercise

Miyashita, Masashi; Kashiwabara, Kyoko

Japanese Journal of Physical Fitness and Sports Medicine 65(4) p.367 - 3732016/01-2016/01

DOIScopus

Detail

ISSN:0039906X

Outline:Energy balance plays an important role in weight control. Ghrelin is known to stimulate food intake, while peptide YY (PYY) and glucagon-like peptide (GLP-1) are known to suppress food intake. These appetite-related hormones are affected by behaviours such as exercise and mastication. Increasing the number of times food is chewed during a standard meal suppresses ghrelin secretion and food intake. The intensity of exercise is more strongly related to the secretion of total ghrelin, acylated ghrelin, PYY3-36 and food intake than the duration or mode of exercise. This review summarises the effects of exercise and mastication on appetiterelated hormones and/or energy intake.

Interrupting Sitting Time with Regular Walks Attenuates Postprandial Triglycerides.

Miyashita M;Edamoto K;Kidokoro T;Yanaoka T;Kashiwabara K;Takahashi M;Burns S

International journal of sports medicine 37(2) 2016-2016

PubMedDOI

Detail

ISSN:1439-3964

Outline::We compared the effects of prolonged sitting with the effects of sitting interrupted by regular walking and the effects of prolonged sitting after continuous walking on postprandial triglyceride in postmenopausal women. 15 participants completed 3 trials in random order: 1) prolonged sitting, 2) regular walking, and 3) prolonged sitting preceded by continuous walking. During the sitting trial, participants rested for 8 h. For the walking trials, participants walked briskly in either twenty 90-sec bouts over 8 h or one 30-min bout in the morning (09:00-09:30). Except for walking, both exercise trials mimicked the sitting trial. In each trial, participants consumed a breakfast (08:00) and lunch (11:00). Blood samples were collected in the fasted state and at 2, 4, 6 and 8 h after breakfast. The serum triglyceride incremental area under the curve was 15 and 14% lower after regular walking compared with prolonged sitting and prolonged sitting after continuous walking (4.73±2.50 vs. 5.52±2.95 vs. 5.50±2.59 mmol/L∙8 h respectively, main effect of trial: P=0.023). Regularly interrupting sitting time with brief bouts of physical activity can reduce postprandial triglyceride in postmenopausal women.

Sex-specific associations of moderate and vigorous physical activity with physical fitness in adolescents.

Kidokoro T;Tanaka H;Naoi K;Ueno K;Yanaoka T;Kashiwabara K;Miyashita M

European journal of sport science 2016-2016

PubMed

Detail

ISSN:1536-7290

Outline::The present study examined the sex-specific associations of moderate and vigorous physical activity (VPA) with physical fitness in 300 Japanese adolescents aged 12-14 years. Participants were asked to wear an accelerometer to evaluate physical activity (PA) levels of various intensities (i.e. moderate PA (MPA), 3-5.9 metabolic equivalents (METs); VPA, ≥6 METs; moderate to vigorous PA (MVPA), ≥3 METs). Eight fitness items were assessed (grip strength, bent-leg sit-up, sit-and-reach, side step, 50 m sprint, standing long jump, handball throw, and distance running) as part of the Japanese standardised fitness test. A fitness composite score was calculated using Japanese fitness norms, and participants were categorised according to their score from category A (most fit) to category E (least fit), with participants in categories D and E defined as having low fitness. It was found that for boys, accumulating more than 80.7 min/day of MVPA may reduce the probability of low fitness (odds ratio (ORs) [95% confidence interval (CI)] = 0.17 [0.06-0.47], p = .001). For girls, accumulating only 8.4 min of VPA could reduce the likelihood of exhibiting low fitness (ORs [95% CI] = 0.23 [0.05-0.89], p = .032). These results reveal that there are sex-specific differences in the relationship between PA and physical fitness in adolescents, suggesting that sex-specific PA recommendation may be needed to improve physical fitness in adolescents.

Sex-specific associations of moderate and vigorous physical activity with physical fitness in adolescents

Kidokoro, T.;Tanaka, H.;Naoi, K.;Ueno, K.;Yanaoka, T.;Kashiwabara, K.;Miyashita, M.

EUROPEAN JOURNAL OF SPORT SCIENCE 16(8) p.1159 - 11662016-2016

DOIWoS

Detail

ISSN:1746-1391

Changes in gastrointestinal hormones: the roles of mastication and exercise

Miyashita Masashi;Kashiwabara Kyoko

Japanese Journal of Physical Fitness and Sports Medicine 65(4) p.367 - 3732016-2016

CiNii

Detail

ISSN:0039-906X

Outline:Energy balance plays an important role in weight control. Ghrelin is known to stimulate food intake, while peptide YY (PYY) and glucagon-like peptide (GLP-1) are known to suppress food intake. These appetite-related hormones are affected by behaviours such as exercise and mastication. Increasing the number of times food is chewed during a standard meal suppresses ghrelin secretion and food intake. The intensity of exercise is more strongly related to the secretion of total ghrelin, acylated ghrelin, PYY3-36 and food intake than the duration or mode of exercise. This review summarises the effects of exercise and mastication on appetite-related hormones and/or energy intake.

Interrupting Sitting Time with Regular Walks Attenuates Postprandial Triglycerides

Miyashita, M.; Edamoto, K.; Kidokoro, T.; Yanaoka, T.; Kashiwabara, K.; Takahashi, M.; Burns, S.

International Journal of Sports Medicine 2015/08-2015/08

DOIScopus

Detail

ISSN:01724622

Outline:Copyright © 2015, Georg Thieme Verlag KG. All rights reserved.We compared the effects of prolonged sitting with the effects of sitting interrupted by regular walking and the effects of prolonged sitting after continuous walking on postprandial triglyceride in postmenopausal women. 15 participants completed 3 trials in random order: 1) prolonged sitting, 2) regular walking, and 3) prolonged sitting preceded by continuous walking. During the sitting trial, participants rested for 8 h. For the walking trials, participants walked briskly in either twenty 90-sec bouts over 8 h or one 30-min bout in the morning (09:00–09:30). Except for walking, both exercise trials mimicked the sitting trial. In each trial, participants consumed a breakfast (08:00) and lunch (11:00). Blood samples were collected in the fasted state and at 2, 4, 6 and 8 h after breakfast. The serum triglyceride incremental area under the curve was 15 and 14% lower after regular walking compared with prolonged sitting and prolonged sitting after continuous walking (4.73±2.50 vs. 5.52±2.95 vs. 5.50±2.59 mmol/L∙8 h respectively, main effect of trial: P=0.023). Regularly interrupting sitting time with brief bouts of physical activity can reduce postprandial triglyceride in postmenopausal women.

High-Intensity Interval Exercise and Postprandial Triacylglycerol

Burns, Stephen F.; Miyashita, Masashi; Stensel, David J.

Sports Medicine 45(7) p.957 - 9682015/04-2015/04

PubMedDOIScopus

Detail

ISSN:01121642

Outline:© 2015, Springer International Publishing Switzerland.This review examined if high-intensity interval exercise (HIIE) reduces postprandial triacylglycerol (TAG) levels. Fifteen studies were identified, in which the effect of interval exercise conducted at an intensity of >65 % of maximal oxygen uptake was evaluated on postprandial TAG levels. Analysis was divided between studies that included supramaximal exercise and those that included submaximal interval exercise. Ten studies examined the effect of a single session of low-volume HIIE including supramaximal sprints on postprandial TAG. Seven of these studies noted reductions in the postprandial total TAG area under the curve the morning after exercise of between ~10 and 21 % compared with rest, but three investigations found no significant difference in TAG levels. Variations in the HIIE protocol used, inter-individual variation or insufficient time post-exercise for an increase in lipoprotein lipase activity are proposed reasons for the divergent results among studies. Five studies examined the effect of high-volume submaximal interval exercise on postprandial TAG. Four of these studies were characterised by high exercise energy expenditure and effectively attenuated total postprandial TAG levels by ~15–30 %, but one study with a lower energy expenditure found no effect on TAG. The evidence suggests that supramaximal HIIE can induce large reductions in postprandial TAG levels but findings are inconsistent. Submaximal interval exercise offers no TAG metabolic or time advantage over continuous aerobic exercise but could be appealing in nature to some individuals. Future research should examine if submaximal interval exercise can reduce TAG levels in line with more realistic and achievable exercise durations of 30 min per day.

Effects of breaking sitting by standing and acute exercise on postprandial oxidative stress

Takahashi, Masaki; Miyashita, Masashi; Park, Jong Hwan; Sakamoto, Shizuo; Suzuki, Katsuhiko

Asian Journal of Sports Medicine 6(3) 2015/01-2015/01

DOIScopus

Detail

ISSN:2008000X

Outline:© 2015, Sports Medicine Research Center.Background: Sedentary behavior, which includes sitting and TV viewing, has been identified as an independent risk factor for type 2 diabetes and cardiovascular disease. Breaking sedentary behavior improves metabolic health such as postprandial glycaemia and insulinemia. However, the mechanisms underlying this effect are unclear. Objectives: Here, we examined whether breaking sitting by standing and acute exercise reduces postprandial oxidative stress. Patient and Methods: Fifteen participants performed 3 trials (sitting, standing, and exercise), each lasting 2 days, in a randomised order. On day one of sitting trial, participants sat in a chair. For the standing trial, the participants stood 6 times, for a 45-minute period each time. For the exercise trial, the participants walked or ran at approximately 60% of age-predicted maximum heart rate for 30 minutes. On day two of each trial, participants rested and consumed the standardised breakfast and lunch. Blood samples were collected in the morning and afternoon on day one, and fasting and at 2, 4, and 6 hours postprandially on day two. Results: The concentrations of serum derivatives of reactive oxygen metabolites (d-ROMs) measured at 4 hours (P = 0.064) and 6 hours (P = 0.071) tended to be higher than that in the fasting state in the sitting trial, but not standing and exercise trial (two-factor analysis of variance (ANOVA), trial × time interaction, P = 0.006). Conclusions: Our results indicate the importance of reducing sitting time for improving postprandial oxidative stress status.

Effect of increased physical activities of daily living on postprandial triacylglycerol concentrations in postmenopausal women

Edamoto, Kanako; Jung, Hyun Hun; Kidokoro, Tetsuhiro; Yanaoka, Takuma; Kashiwabara, Kyoko; Takahashi, Masaki; Miyashita, Masashi; Miyashita, Masashi

Japanese Journal of Physical Fitness and Sports Medicine 64(5) p.485 - 4922015/01-2015/01

DOIScopus

Detail

ISSN:0039906X

Outline:Limited evidence was available to support the effect of self-selected activities performed under free-living conditions on postprandial lipaemia, particularly for older adults. Thus, the aim of the present study was to examine the chronic effect of increased physical activity of daily living on postprandial triacylglycerol (TAG) in postmenopausal women. Twentyeight postmenopausal women, aged 71 ± 4 years (mean ± SD), were randomly divided into two groups: active (n=14) and control (n=14) groups. The participants in the active group were asked to increase their activities above their usual lifestyle levels for 4 weeks; freely deciding the duration and intensity of their chosen activities. The participants in the control group maintained their usual lifestyle for 4 weeks. All participants were asked to wear a uniaxial accelerometer for 4 consecutive weeks. At baseline and after 4 weeks, all participants rested and consumed a standardised breakfast and lunch after a 24-h period of physical activity avoidance. Blood samples were collected in the fasted state (0 h) and at 2, 4 and 6 h after breakfast. After 4 weeks, the participants in the active group increased their step counts by 600 steps/day (from 6979 ± 2057 to 7586 ± 2301 steps/day, p=0.047). There was no difference in the pattern of postprandial TAG response between groups (trial × time interaction, p=0.335). A previous study has suggested that only recent exercise (i.e., 12h before but not 24 h before) appears to facilitate the exercise-induced postprandial TAG lowering effects. Thus, in the present study, postprandial lipaemia was not reduced after performing self-selected activities under free-living in postmenopausal women.

Effects of low-carbohydrate and low-fat diets

Burns, Stephen F.; Miyashita, Masashi

Annals of Internal Medicine 162(5) 2015/01-2015/01

PubMedScopus

Detail

ISSN:00034819

The role of physical activity in the prevention of atherosclerosis: Focus on oxidative stress and oxidised low-density lipoprotein

Miyashita, Masashi; Takahashi, Masaki; Park, Jong Hwan

Physical Activity, Exercise, Sedentary Behavior and Health p.263 - 2722015/01-2015/01

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Outline:© 2015, Springer Japan.Oxidative stress and inflammatory conditions are associated with an increased risk of atherosclerosis and cardiovascular disease. A large body of evidence supports the notion that higher intensity and/or longer duration exercise training can reduce many cardiovascular disease risk factors including oxidative stress and oxidised low-density lipoprotein. Although physical activity guidelines suggest that adults should engage in at least 150 min of physical activity each week, estimates in many countries suggest that many individuals do not exercise adequately as per guidelines. It is important to determine the minimum level of physical activity required to reduce the risks of cardiovascular disease and atherosclerosis. Thus, the authors conducted a series of investigations to examine the influence of daily physical activity or low-volume exercise training on cardiovascular disease risk factors including oxidative stress markers and oxidised low-density lipoprotein concentration in older adults. We demonstrate that daily physical activity and a low-volume walking program (<150 min/week) improved oxidative stress status in older adults. The implications of the research findings may encourage more people to incorporate a small amount of physical activity into their lives, and translate to prevention of cardiovascular disease and atherosclerosis in the long term.

Effect of increased physical activities of daily living on postprandial triacylglycerol concentrations in postmenopausal women

Edamoto Kanako;Jung Hyun-Hun;Kidokoro Tetsuhiro;Yanaoka Takuma;Kashiwabara Kyoko;Takahashi Masaki;Miyashita Masashi

Jpn. J. Phys. Fitness Sports Med. 64(5) p.485 - 4922015-2015

CiNii

Detail

ISSN:0039-906X

Outline:Limited evidence was available to support the effect of self-selected activities performed under free-living conditions on postprandial lipaemia, particularly for older adults. Thus, the aim of the present study was to examine the chronic effect of increased physical activity of daily living on postprandial triacylglycerol (TAG) in postmenopausal women. Twenty-eight postmenopausal women, aged 71 ± 4 years (mean ± SD), were randomly divided into two groups: active (n=14) and control (n=14) groups. The participants in the active group were asked to increase their activities above their usual lifestyle levels for 4 weeks; freely deciding the duration and intensity of their chosen activities. The participants in the control group maintained their usual lifestyle for 4 weeks. All participants were asked to wear a uniaxial accelerometer for 4 consecutive weeks. At baseline and after 4 weeks, all participants rested and consumed a standardised breakfast and lunch after a 24-h period of physical activity avoidance. Blood samples were collected in the fasted state (0 h) and at 2, 4 and 6 h after breakfast. After 4 weeks, the participants in the active group increased their step counts by 600 steps/day (from 6979 ± 2057 to 7586 ± 2301 steps/day, p=0.047). There was no difference in the pattern of postprandial TAG response between groups (trial × time interaction, p=0.335). A previous study has suggested that only recent exercise (i.e., 12h before but not 24 h before) appears to facilitate the exercise-induced postprandial TAG lowering effects. Thus, in the present study, postprandial lipaemia was not reduced after performing self-selected activities under free-living in postmenopausal women.

Effects of Breaking Sitting by Standing and Acute Exercise on Postprandial Oxidative Stress.

Takahashi Masaki;Miyashita Masashi;Park Jong-Hwan;Sakamoto Shizuo;Suzuki Katsuhiko

Asian journal of sports medicine 6(3) 2015-2015

PubMedDOI

Detail

ISSN:2008-000X

Outline:BACKGROUND:Sedentary behavior, which includes sitting and TV viewing, has been identified as an independent risk factor for type 2 diabetes and cardiovascular disease. Breaking sedentary behavior improves metabolic health such as postprandial glycaemia and insulinemia. However, the mechanisms underlying this effect are unclear.;OBJECTIVES:Here, we examined whether breaking sitting by standing and acute exercise reduces postprandial oxidative stress.;PATIENT AND METHODS:Fifteen participants performed 3 trials (sitting, standing, and exercise), each lasting 2 days, in a randomised order. On day one of sitting trial, participants sat in a chair. For the standing trial, the participants stood 6 times, for a 45-minute period each time. For the exercise trial, the participants walked or ran at approximately 60% of age-predicted maximum heart rate for 30 minutes. On day two of each trial, participants rested and consumed the standardised breakfast and lunch. Blood samples were collected in the morning and afternoon on day one, and fasting and at 2, 4, and 6 hours postprandially on day two.;RESULTS:The concentrations of serum derivatives of reactive oxygen metabolites (d-ROMs) measured at 4 hours (P = 0.064) and 6 hours (P = 0.071) tended to be higher than that in the fasting state in the sitting trial, but not standing and exercise trial (two-factor analysis of variance (ANOVA), trial × time interaction, P = 0.006).;CONCLUSIONS:Our results indicate the importance of reducing sitting time for improving postprandial oxidative stress status.

Participation Report on the International Session at the 69th Annual Meeting of the Japanese Society of Physical Fitness and Sports Medicine

Jpn. J. Phys. Fitness Sports Med. 64(1) p.216 - 2162015-2015

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ISSN:0039-906X

Participation Report on the International Session at the 70th Annual Meeting of the Japanese Society of Physical Fitness and Sports Medicine

Jpn. J. Phys. Fitness Sports Med. 64(6) p.754 - 7542015-2015

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ISSN:0039-906X

Increased participation in weekend physical activity reduces postprandial lipemia in postmenopausal women

Miyashita, M.; Takahashi, M.; Burns, S.

International Journal of Sports Medicine 35(13) p.1059 - 10642014/06-2014/06

DOIScopus

Detail

ISSN:01724622

Outline:This study examined the acute effect of increased participation in weekend physical activity on postprandial lipemia in postmenopausal women. Ten postmenopausal women, aged 63±4 years (mean±SD), completed 2 trials in a random order: 1) control trial and 2) active trial. In the control trial, participants maintained their usual weekend lifestyle. In the active trial, participants increased their weekend activities above their usual lifestyle levels, freely deciding the duration and intensity of their chosen activities. On Monday of each trial, participants rested and consumed a standardised breakfast and lunch. Capillary blood samples were collected in the fasted state (0 h) and at 2, 4 and 6 h after eating. In the active trial, participants increased their moderate to vigorous weekend physical activity by 16 min (mean±SD: 12.3±6.7 min vs. 27.9±11.9 min, P=0.009). Area under the capillary triacylglycerol concentration vs. time curve was 13% lower in the active trial than control trial (8.8±3.8 vs. 10.1±3.9 mmol/L 6 h, P=0.024). These findings demonstrate that small increases in moderate to vigorous physical activity under a real-life setting lowers postprandial lipemia in postmenopausal women.

Effects of curcumin supplementation on exercise-induced oxidative stress in humans

Takahashi, M.; Suzuki, K.; Kim, H. K.; Otsuka, Y.; Imaizumi, A.; Miyashita, M.; Sakamoto, S.

International Journal of Sports Medicine 35(6) p.469 - 4752014/01-2014/01

PubMedDOIScopus

Detail

ISSN:01724622

Outline:The purpose of this study was to investigate the effects of curcumin supplementation on exercise-induced oxidative stress in humans. 10 male participants, ages 26.8±2.0 years (mean±SE), completed 3 trials in a random order: (1) placebo (control), (2) single (only before exercise) and (3) double (before and immediately after exercise) curcumin supplementation trials. Each participant received oral administration of 90 mg of curcumin or the placebo 2h before exercise and immediately after exercise. Each participant walked or ran at 65% of V̇2max on a treadmill for 60min. Blood samples were collected pre-exercise, immediately after exercise and 2h after exercise. The concentrations of serum derivatives of reactive oxygen metabolites measured immediately after exercise were significantly higher than pre-exercise values in the placebo trial (308.8±12.9 U. CARR, P<0.05), but not in the single (259.9±17.1 U. CARR) or double (273.6±19.7 U. CARR) curcumin supplementation trials. Serum biological antioxidant potential concentrations measured immediately after exercise were significantly elevated in the single and double curcumin supplementation trials compared with pre-exercise values (P<0.05). These findings indicate that curcumin supplementation can attenuate exercise-induced oxidative stress by increasing blood antioxidant capacity. © Georg Thieme Verlag KG Stuttgart · New York.

Acute ingestion of catechin-rich green tea improves postprandial glucose status and increases serum thioredoxin concentrations in postmenopausal women

Takahashi, Masaki; Miyashita, Masashi; Suzuki, Katsuhiko; Bae, Seong Ryu; Kim, Hyeon Ki; Wakisaka, Takuya; Matsui, Yuji; Takeshita, Masao; Yasunaga, Koichi

British Journal of Nutrition 112(9) p.1542 - 15502014/01-2014/01

PubMedDOIScopus

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ISSN:00071145

Outline:© 2014 The Authors.Elevated postprandial hyperglycaemia and oxidative stress increase the risks of type 2 diabetes and CVD. Green tea catechin possesses antidiabetic properties and antioxidant capacity. In the present study, we examined the acute and continuous effects of ingestion of catechin-rich green tea on postprandial hyperglycaemia and oxidative stress in healthy postmenopausal women. Participants were randomly assigned into the placebo (P, n 11) or green tea (GT, n 11) group. The GT group consumed a catechin-rich green tea (catechins 615 mg/350 ml) beverage per d for 4 weeks. The P group consumed a placebo (catechins 92 mg/350 ml) beverage per d for 4 weeks. At baseline and after 4 weeks, participants of each group consumed their designated beverages with breakfast and consumed lunch 3 h after breakfast. Venous blood samples were collected in the fasted state (0 h) and at 2, 4 and 6 h after breakfast. Postprandial glucose concentrations were 3 % lower in the GT group than in the P group (three-factor ANOVA, group × time interaction, P< 0·05). Serum concentrations of the derivatives of reactive oxygen metabolites increased after meals (P< 0·05), but no effect of catechin-rich green tea intake was observed. Conversely, serum postprandial thioredoxin concentrations were 5 % higher in the GT group than in the P group (three-factor ANOVA, group × time interaction, P< 0·05). These findings indicate that an acute ingestion of catechin-rich green tea has beneficial effects on postprandial glucose and redox homeostasis in postmenopausal women.

Low-volume walking program improves cardiovascular-related health in older adults

Park, Jong Hwan; Miyashita, Masashi; Takahashi, Masaki; Kawanishi, Noriaki; Hayashida, Harumi; Kim, Hyun Shik; Suzuki, Katsuhiko; Nakamura, Yoshio

Journal of Sports Science and Medicine 13(3) p.624 - 6312014/01-2014/01

Scopus

Detail

Outline:Although numerous sources of evidence show that regular physical activity is beneficial to health, most individuals do not engage in a sufficient amount of physical activity to meet the guidelines set out by expert panels. In addition, the minimum amount of physical activity associated with reduced cardiovascular disease risk markers is not clear in older adults. The purpose of this study was to determine the effects of a 12-week walking program involving an exercise volume below the current minimum physical activity recommendation on cardiovascular disease risk markers in older adults. The participants were recruited from the following two groups separately: a walking group (n = 14) and a control group (n = 14). In the walking group, participants walked 30 to 60 minutes per session on 2 days per week for 12 weeks (average walking time, 49.4 ± 8.8 min/session). Plasma oxidised low-density lipoprotein concentrations tended to be lower than baseline values in the walking group after 12 weeks (paired t-test, p = 0.127). The ratio of oxidised low-density lipoprotein to high-density lipoprotein cholesterol was significantly lower than the baseline ratio in the walking group after 12 weeks (paired t-test, p = 0.035). Resting systolic blood pressure and diastolic blood pressure were significantly lower than baseline values in the walking group after 12 weeks (paired t-tests, p = 0.002, p < 0.0005, respectively). Our findings demonstrate that a 12-week walking program comprising a low volume of physical activity confers a benefit to cardiovascular-related health in older adults. © Journal of Sports Science and Medicine.

Increased participation in weekend physical activity reduces postprandial lipemia in postmenopausal women.

Miyashita M;Takahashi M;Burns S

International journal of sports medicine 35(13) 2014-2014

PubMedDOI

Detail

ISSN:1439-3964

Outline::This study examined the acute effect of increased participation in weekend physical activity on postprandial lipemia in postmenopausal women. Ten postmenopausal women, aged 63±4 years (mean±SD), completed 2 trials in a random order: 1) control trial and 2) active trial. In the control trial, participants maintained their usual weekend lifestyle. In the active trial, participants increased their weekend activities above their usual lifestyle levels, freely deciding the duration and intensity of their chosen activities. On Monday of each trial, participants rested and consumed a standardised breakfast and lunch. Capillary blood samples were collected in the fasted state (0 h) and at 2, 4 and 6 h after eating. In the active trial, participants increased their moderate to vigorous weekend physical activity by 16 min (mean±SD: 12.3±6.7 min vs. 27.9±11.9 min, P=0.009). Area under the capillary triacylglycerol concentration vs. time curve was 13% lower in the active trial than control trial (8.8±3.8 vs. 10.1±3.9 mmol/L∙6 h, P=0.024). These findings demonstrate that small increases in moderate to vigorous physical activity under a real-life setting lowers postprandial lipemia in postmenopausal women.

Effects of curcumin supplementation on exercise-induced oxidative stress in humans.

Takahashi M;Suzuki K;Kim H K;Otsuka Y;Imaizumi A;Miyashita M;Sakamoto S

International journal of sports medicine 35(6) 2014-2014

PubMedDOI

Detail

ISSN:1439-3964

Outline::The purpose of this study was to investigate the effects of curcumin supplementation on exercise-induced oxidative stress in humans. 10 male participants, ages 26.8±2.0 years (mean±SE), completed 3 trials in a random order: (1) placebo (control), (2) single (only before exercise) and (3) double (before and immediately after exercise) curcumin supplementation trials. Each participant received oral administration of 90 mg of curcumin or the placebo 2h before exercise and immediately after exercise. Each participant walked or ran at 65% of V˙2max on a treadmill for 60min. Blood samples were collected pre-exercise, immediately after exercise and 2h after exercise. The concentrations of serum derivatives of reactive oxygen metabolites measured immediately after exercise were significantly higher than pre-exercise values in the placebo trial (308.8±12.9 U. CARR, P<0.05), but not in the single (259.9±17.1 U. CARR) or double (273.6±19.7 U. CARR) curcumin supplementation trials. Serum biological antioxidant potential concentrations measured immediately after exercise were significantly elevated in the single and double curcumin supplementation trials compared with pre-exercise values (P<0.05). These findings indicate that curcumin supplementation can attenuate exercise-induced oxidative stress by increasing blood antioxidant capacity.

Low-volume walking program improves cardiovascular-related health in older adults.

Park Jong-Hwan;Miyashita Masashi;Takahashi Masaki;Kawanishi Noriaki;Hayashida Harumi;Kim Hyun-Shik;Suzuki Katsuhiko;Nakamura Yoshio

Journal of sports science & medicine 13(3) 2014-2014

PubMed

Detail

ISSN:1303-2968

Outline::Although numerous sources of evidence show that regular physical activity is beneficial to health, most individuals do not engage in a sufficient amount of physical activity to meet the guidelines set out by expert panels. In addition, the minimum amount of physical activity associated with reduced cardiovascular disease risk markers is not clear in older adults. The purpose of this study was to determine the effects of a 12-week walking program involving an exercise volume below the current minimum physical activity recommendation on cardiovascular disease risk markers in older adults. The participants were recruited from the following two groups separately: a walking group (n = 14) and a control group (n = 14). In the walking group, participants walked 30 to 60 minutes per session on 2 days per week for 12 weeks (average walking time, 49.4 ± 8.8 min/session). Plasma oxidised low-density lipoprotein concentrations tended to be lower than baseline values in the walking group after 12 weeks (paired t-test, p = 0.127). The ratio of oxidised low-density lipoprotein to high-density lipoprotein cholesterol was significantly lower than the baseline ratio in the walking group after 12 weeks (paired t-test, p = 0.035). Resting systolic blood pressure and diastolic blood pressure were significantly lower than baseline values in the walking group after 12 weeks (paired t-tests, p = 0.002, p < 0.0005, respectively). Our findings demonstrate that a 12-week walking program comprising a low volume of physical activity confers a benefit to cardiovascular-related health in older adults. Key PointsIt is important to consider baseline physical activity levels when evaluating physical activity program.Being physically active is important to reduce the potential risk marker of cardiovascular disease in older adults.These data imply that a small volume of 12-week walking program confers a benefit to cardiovascular-related health in older adults.

Acute ingestion of catechin-rich green tea improves postprandial glucose status and increases serum thioredoxin concentrations in postmenopausal women.

Takahashi Masaki;Miyashita Masashi;Suzuki Katsuhiko;Bae Seong-Ryu;Kim Hyeon-Ki;Wakisaka Takuya;Matsui Yuji;Takeshita Masao;Yasunaga Koichi

The British journal of nutrition 112(9) 2014-2014

PubMedDOI

Detail

ISSN:1475-2662

Outline::Elevated postprandial hyperglycaemia and oxidative stress increase the risks of type 2 diabetes and CVD. Green tea catechin possesses antidiabetic properties and antioxidant capacity. In the present study, we examined the acute and continuous effects of ingestion of catechin-rich green tea on postprandial hyperglycaemia and oxidative stress in healthy postmenopausal women. Participants were randomly assigned into the placebo (P, n 11) or green tea (GT, n 11) group. The GT group consumed a catechin-rich green tea (catechins 615 mg/350 ml) beverage per d for 4 weeks. The P group consumed a placebo (catechins 92 mg/350 ml) beverage per d for 4 weeks. At baseline and after 4 weeks, participants of each group consumed their designated beverages with breakfast and consumed lunch 3 h after breakfast. Venous blood samples were collected in the fasted state (0 h) and at 2, 4 and 6 h after breakfast. Postprandial glucose concentrations were 3 % lower in the GT group than in the P group (three-factor ANOVA, group × time interaction, P< 0·05). Serum concentrations of the derivatives of reactive oxygen metabolites increased after meals (P< 0·05), but no effect of catechin-rich green tea intake was observed. Conversely, serum postprandial thioredoxin concentrations were 5 % higher in the GT group than in the P group (three-factor ANOVA, group × time interaction, P< 0·05). These findings indicate that an acute ingestion of catechin-rich green tea has beneficial effects on postprandial glucose and redox homeostasis in postmenopausal women.

Associations between health-related physical fitness and obesity in Taiwanese youth

Liao, Yung; Chang, Shao Hsi; Miyashita, Masashi; Stensel, David; Chen, Jui Fu; Wen, Liang Tsai; Nakamura, Yoshio

Journal of Sports Sciences 31(16) p.1797 - 18042013/12-2013/12

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ISSN:02640414

Outline:This study examined associations between four health-related physical fitness measures and obesity in Taiwanese youth aged 10-18 years. Data from 13,500 school-aged youth were randomly selected from the "School Physical Fitness Database" of Taiwan by sex and age. Variables examined were height, body mass and performance on modified sit-and-reach (flexibility), bent-leg sit-up (abdominal muscular strength/endurance), standing long jump (lower body explosive strength) and distance run/walk (cardiorespiratory endurance). Adjusted logistic regression analyses were performed. Increased odds of being obese with decreased fitness levels were observed for lower body explosive strength and cardiorespiratory endurance in both sexes. The highest odds of being obese was found in the least fit quintile of cardiorespiratory endurance compared with the most fit quintile both in boys (Odds ratio, OR = 10.44; 95% confidence interval (CI), 7.94-13.73) and girls (OR = 5.40; 95% CI, 3.90-7.47). These findings suggest that in addition to cardiorespiratory fitness, lower body explosive strength is also associated with childhood and adolescent obesity. © 2013 Taylor & Francis.

Low-volume exercise training and vitamin E supplementation attenuates oxidative stress in postmenopausal women

Takahashi, Masaki; Takahashi, Masaki; Miyashita, Masashi; Park, Jong Hwan; Kawanishi, Noriaki; Kawanishi, Noriaki; Bae, Seong Ryu; Nakamura, Yoshio; Sakamoto, Shizuo; Suzuki, Katsuhiko

Journal of Nutritional Science and Vitaminology 59(5) p.375 - 3832013/12-2013/12

PubMedDOIScopus

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ISSN:03014800

Outline:The purpose of this study was to investigate the effects of low-volume exercise training (90 min/wk) and vitamin E supplementation on oxidative stress markers in postmenopausal women. The participants were non-randomly assigned the following four groups: control (C, n=8), vitamin E (S, n=8), exercise (Ex, n=6), or vitamin E and exercise (S+Ex, n=7). The S and S+Ex groups were instructed to take vitamin E (α-tocopherol, 300 mg/d) capsules for 12 wk. The exercise program of Ex and S+Ex groups consisted of walking for a 30-60 min/session 2 d per week for 12 wk. The serum derivatives of reactive oxygen metabolites concentrations were significantly decreased in the Ex, and S+Ex groups after 12 wk compared with the baseline values (three-factor ANOVA, an interaction between exercise and time, p<0.05). Conversely, serum biological antioxidant potential concentrations in the S and Ex groups were significantly higher at 12 wk than at the baseline, but not in the S+Ex group (three-factor ANOVA, an interaction between supplementation, exercise and time, p<0.05). Plasma thioredoxin concentrations in the S, Ex, and S+Ex groups were significantly higher at 12 wk than at the baseline values (three-factor ANOVA, interactions between exercise and time, and between supplementation, exercise and time, p<0.05). Our findings suggest that low-volume physical activity may improve resting oxidative stress status in postmenopausal women.

The association between physical activity and sex-specific oxidative stress in older adults

Takahashi, Masaki; Miyashita, Masashi; Park, Jong Hwan; Kim, Hyun Shik; Nakamura, Yoshio; Sakamoto, Shizuo; Suzuki, Katsuhiko

Journal of Sports Science and Medicine 12(3) p.571 - 5782013/09-2013/09

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Outline:Oxidative stress increases with advancing age and is a mediator of several diseases including cancer, cardiovascular disease, and diabetes. Moreover, postmenopausal women have a lower estrogen concentration, which is associated with elevated oxidative stress. However, there is no definitive evidence regarding the relationship between daily physical activity and oxidative stress status in older adults, including postmenopausal women. Twenty- nine adults (age, 70.1 ± 1.0 years, mean ± SE; 12 women and 17 men) were examined in this cross-sectional study. Prior to blood collection, the participants were asked to wear a uniaxial accelerometer for 4 consecutive weeks to determine their level of physical activity. After a 48-h period of physical activity avoidance and a 10-h overnight fast, venous blood samples were obtained from each participant. Fasting plasma derivatives of reactive oxygen metabolites (d-ROMs) and malondialdehyde (MDA) concentrations of oxidative stress markers were negatively correlated with the amount of physical activity in women (d-ROMs; r = -0.708, p = 0.002) (MDA; r = -0.549, p = 0.028), but not in men. Fasting plasma biological antioxidant potential of antioxidant capacity marker was positively correlated with the amount of physical activity in women (BAP; r = 0.657, p = 0.006) (GSH; r = 0.549, p = 0.028), but not in men. Moreover, superoxide dismutase activity of antioxidant capacity marker was positively correlated with the amount of physical activity in men (r = 0.627, p = 0.039), but not in women. There were no associations between physical activity and other oxidative stress markers (reduced and oxidized glutathione, glutathione peroxidise, thioredoxin). These findings suggest that regular physical activity may have a protective effect against oxidative stress by increasing total antioxidant capacity, especially in postmenopausal women. © Journal of Sports Science and Medicine.

Effects of different modes of exercise on appetite and appetite-regulating hormones

Kawano, Hiroshi; Mineta, Mayuko; Asaka, Meiko; Miyashita, Masashi; Numao, Shigeharu; Gando, Yuko; Ando, Takafumi; Sakamoto, Shizuo; Higuchi, Mitsuru

Appetite 66p.26 - 332013/07-2013/07

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ISSN:01956663

Outline:The present study determined the changes in appetite and appetite-regulating gut hormones during and following bouts of both rope skipping exercise (weight-bearing) and bicycle ergometer exercise (non-weight-bearing). After a 12-h fast, 15 young men (mean ± SD, age 24.4 ± 1.7. yrs, maximal oxygen uptake 47.0 ± 6.5. mL/kg/min) participated in three 160. min trials: (1) rope skipping exercise (295 ± 40. kcal, 3 sets × 10. min with 5-min interval, then rested for 120. min); (2) bicycle ergometer exercise (288 ± 36. kcal, 3 sets × 10. min with 5-min interval, then rested for 120. min); (3) control (rested for 160. min). Ratings of perceived hunger and acylated ghrelin were suppressed and total peptide YY (PYY) were increased during and immediately after exercise in both exercise trials, but glucagon liked peptide-1 was not changed. Furthermore, suppressed hunger during rope skipping exercise was greater than that during bicycle ergometer exercise, but there were no differences in acylated ghrelin and total PYY. These results indicate that weight-bearing exercise has a greater exercise-induced appetite suppressive effect compared with non-weight-bearing exercise, and both forms of exercise lowered acylated ghrelin and increased total PYY, but the changes did not differ significantly between exercise modes. © 2013 Elsevier Ltd.

Effects of intermittent physical activity on fat utilization over a whole day

Ando, Takafumi; Ando, Takafumi; Usui, Chiyoko; Usui, Chiyoko; Ohkawara, Kazunori; Ohkawara, Kazunori; Miyake, Rieko; Miyashita, Masashi; Park, Jonghoon; Ezaki, Osamu; Higuchi, Mitsuru; Tanaka, Shigeho; Tanaka, Shigeho

Medicine and Science in Sports and Exercise 45(7) p.1410 - 14182013/07-2013/07

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ISSN:01959131

Outline:PURPOSE: We examined whether continuous and intermittent physical activity (PA) differentially influence fat utilization. METHODS: This was a randomized crossover study. Nine healthy young male participants performed two 39-h (two nights, three days) PA sessions (continuous and intermittent exercise) in a respiratory chamber to measure energy expenditure (EE) and substrate oxidation. Participants used a stationary cycling ergometer continuously for 40 min and then 45 min in the continuous PA trial and for 5 min every 30 min 17 times in the intermittent PA trial. They consumed high-carbohydrate meals corresponding to predicted daily total EE for 3 d before entering the respiratory chamber and four high-fat meals corresponding to predicted total EE in the chamber. RESULTS: Twenty-three-hour RER adjusted for sleeping RER on the preceding day was significantly lower in the intermittent PA trial than that in the continuous PA trial (P = 0.021). Twenty-three-hour RER adjusted for sleeping RER on the preceding day was correlated with accumulated consecutive minutes of METs ≤1.5 (3 min or more, r = 0.477; 5 min or more, r = 0.510; 10 min or more, r = 0.605). CONCLUSIONS: The intermittent PA trial induced greater fat utilization than the continuous PA trial. The present study, therefore, suggests that intermittent PA has a beneficial effect on 24-h fat oxidation after consumption of a high-fat meal, which may help prevent weight gain over time. Copyright © 2013 by the American College of Sports Medicine.

Low-volume exercise training attenuates oxidative stress and neutrophils activation in older adults

Takahashi, Masaki; Takahashi, Masaki; Miyashita, Masashi; Kawanishi, Noriaki; Kawanishi, Noriaki; Park, Jong Hwan; Hayashida, Harumi; Kim, Hyun Shik; Nakamura, Yoshio; Sakamoto, Shizuo; Suzuki, Katsuhiko

European Journal of Applied Physiology 113(5) p.1117 - 11262013/05-2013/05

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ISSN:14396319

Outline:The purpose of this study was to investigate the effects of low-volume exercise training (100 min/week) on oxidative stress and neutrophils activation markers in older adults. Twenty-eight older adults (age range 65-78 years) were assigned into control (n = 14) or exercise (n = 14) groups. The exercise program consisted of walking 30-60 min/session, 2 days each week for 12 weeks. Blood samples were taken before starting the sessions (baseline) and when they ended. Fasting plasma and serum oxidative stress and inflammatory markers were measured using commercial kits. Cell surface expression of adhesion molecules on circulating leukocytes (CD66b and CD62L) was determined using flow cytometry. The concentrations of derivatives of reactive oxygen metabolites tended to be lower than the baseline values only in the exercise group (P = 0.05). The biological antioxidant potential, thioredoxin concentrations, and glutathione peroxidase activities significantly increased only in the exercise group (P < 0.05 for all). While CD66b expression tended to decrease only in the exercise group, CD62L expression significantly increased (P < 0.05). Our findings indicate that exercise training below the current recommended level of at least 150 min/week attenuates basal oxidative stress and neutrophil activation in older adults. Thus, our findings may encourage more people to incorporate a small amount of physical activity into their lives. © 2012 Springer-Verlag Berlin Heidelberg.

Effects of low-volume walking programme and vitamin e supplementation on oxidative damage and health-related variables in healthy older adults

Park, Jong Hwan; Miyashita, Masashi; Takahashi, Masaki; Takahashi, Masaki; Kawanishi, Noriaki; Kawanishi, Noriaki; Bae, Seong Ryu; Kim, Hyun Shik; Suzuki, Katsuhiko; Nakamura, Yoshio

Nutrition and Metabolism 10(1) 2013/05-2013/05

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Outline:Background: Both exercise and vitamin E supplementation have been shown to reduce oxidative stress and cardiovascular disease risk in older adults, and when combined there is evidence suggesting that they act synergistically. The currently recommended amount of exercise for older adults is 150 min/week of moderate-intensity exercise; however, the minimum amount of exercise necessary to achieve health benefits is not known. The purpose of this study was to investigate the effects of 12 weeks of participation in a low-volume walking exercise programme (i.e. 90 min/week) combined with daily vitamin E supplementation on thiobarbituric acid reactive substances (TBARS) and oxidised low-density lipoprotein (LDL) concentrations in older adults. Methods. The participants were recruited from the following four groups separately: 1) control (CG, n = 14), 2) vitamin E supplementation (SG, n = 10), 3) walking (WG, n = 7), or 4) walking + supplementation (WSG, n = 7). In the CG, participants were advised to maintain their normal lifestyle during the study. Participants in both the SG and WSG received 450 IU (300 mg) /day of α-tocopherol for 12 weeks. The exercise programme for the WG and WSG consisted of two 30-60 minute sessions weekly for 12 weeks (average walking time was 44.5 ± 1.6 min/session). Blood samples were collected at baseline and at 12 weeks. Results: Delta plasma oxidised LDL concentrations did not differ among four groups (One-factor ANOVA, P = 0.116). However, negative delta plasma TBARS, a marker of oxidative damage, concentrations were observed in the WG, WSG and SG relative to the CG at the end of the study period (One-factor ANOVA, P = 0.001; post hoc tests; CG compared with WG, WSG and SG, P = 0.005; P = 0.021; P = 0.024, respectively). Conclusion: These findings suggest that a low-volume of physical activity and/or vitamin E supplementation may be an effective intervention strategy for reducing TBARS concentrations of older adults. Trial registration. UMIN000008304. © 2013 Park et al.; licensee BioMed Central Ltd.

Effect of one night of sleep deprivation on maximal fat oxidation during graded exercise

KONISHI Masayuki;TAKAHASHI Masaki;ENDO Naoya;NUMAO Shigeharu;TAKAGI Shun;MIYASHITA Masashi;MIDORIKAWA Taishi;SUZUKI Katsuhiko;SAKAMOTO Shizuo

JPFSM 2(1) p.121 - 1262013/03-2013/03

CiNii

Detail

ISSN:21868131

Outline:The aim of this study was to investigate the effects of one night of sleep deprivation on maximal fat oxidation during a graded exercise test. Ten healthy young males underwent two 2-day control and sleep deprivation trials. Participants were allowed normal sleep from 2300 to 0700 for the control trial, whereas they were required to stay awake for 34 h during the sleep deprivation trial. At 1700 on day 2, participants performed a graded exercise test to exhaustion on a treadmill; this allowed us to determine maximal oxygen uptake and maximal fat oxidation. Before and immediately after the graded exercise test, blood samples were collected in order to measure glucose, insulin, free fatty acid, and triglyceride concentrations. Plasma glucose concentrations were significantly higher in the sleep deprivation trial than in the control trial before the graded exercise test. Serum insulin and free fatty acid concentrations were not significantly different between the two trials. Serum triglyceride concentrations were significantly lower in the sleep deprivation trial than in the control trial. The maximal fat oxidation rate, oxygen uptake, and heart rate at maximal fat oxidation intensity, during the graded exercise test, were not significantly different between the two trials. These findings suggest that maximal fat oxidation during graded exercise is unaffected by one night of sleep deprivation.

Effects of sleep deprivation on autonomic and endocrine functions throughout the day and on exercise tolerance in the evening

Konishi, Masayuki; Takahashi, Masaki; Endo, Naoya; Numao, Shigeharu; Numao, Shigeharu; Takagi, Shun; Miyashita, Masashi; Midorikawa, Taishi; Suzuki, Katsuhiko; Sakamoto, Shizuo

Journal of Sports Sciences 31(3) p.248 - 2552013/02-2013/02

PubMedDOIScopus

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ISSN:02640414

Outline:The aim of this study was to investigate the effects of sleep deprivation on autonomic and endocrine functions during the day and on exercise tolerance in the evening. Ten healthy young males completed two, 2-day control and sleep deprivation trials. For the control trial, participants were allowed normal sleep from 23:00 to 07:00 h. For the sleep deprivation trial, participants did not sleep for 34 h. Autonomic activity was measured from 19:00 h on day 1 to 16:00 h on day 2 by frequency-domain measures of heart rate variability. Endocrine function was examined by measuring adrenocorticotropic hormone and cortisol from venous blood samples collected on day 2 at 09:00, 13:00, and 17:00 h and immediately after an exercise tolerance testing. Autonomic regulation, particularly parasympathetic regulation estimated from the high-frequency component of heart rate variability analysis, was significantly higher in the sleep deprivation trial than in the control trial in the morning and afternoon of day 2. Plasma adrenocorticotropic hormone concentrations were significantly higher at 09:00 and 13:00 h of day 2 under sleep deprivation. Heart rate during exercise was significantly lower following sleep deprivation. Therefore, the effects of sleep deprivation on autonomic regulation depend on the time of the day. © 2013 Copyright Taylor and Francis Group, LLC.

Postprandial lipaemia: Effects of sitting, standing and walking in healthy normolipidaemic humans

Miyashita, M.; Park, J. H.; Takahashi, M.; Suzuki, K.; Stensel, D.; Nakamura, Y.

International Journal of Sports Medicine 34(1) p.21 - 272013/01-2013/01

PubMedDOIScopus

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ISSN:01724622

Outline:Long periods of sedentary behaviour may adversely affect health irrespective of overall physical activity levels. This study compared the effects of sitting, standing and walking on postprandial lipaemia in healthy normolipidaemic Japanese men. 15 participants, aged 26.8±2.0 years (mean±SD), completed 3, 2-day trials in a random order: 1) sitting (control), 2) standing, and 3) walking. On day 1 of the sitting trial, participants rested. On day 1 of the standing trial, participants stood for six, 45-min periods. On day 1 of the walking trial, participants walked briskly for 30 min at approximately 60% of maximum heart rate. On day 2 of each trial, participants rested and consumed test meals for breakfast and lunch. Venous blood samples were collected in the morning and afternoon on day 1, and in the fasted state (0 h) and at 2, 4 and 6 h postprandially on day 2. On day 2 area under the serum triacylglycerol concentration vs. time curve was 18% lower on the walking trial than the sitting and standing trials (1-factor ANOVA, P=0.015). Hence postprandial lipaemia was not reduced after standing but was reduced after low-volume walking compared with sitting in healthy normolipidaemic Japanese men. © Georg Thieme Verlag KG Stuttgart · New York.

The influence of vigorous running and cycling exercise on hunger perceptions and plasma acylated ghrelin concentrations in lean young men

Wasse, Lucy K.; Wasse, Lucy K.; Sunderland, Caroline; King, James A.; Miyashita, Masashi; Stensel, David J.

Applied Physiology, Nutrition and Metabolism 38(1) p.1 - 62013/01-2013/01

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ISSN:17155312

Outline:Vigorous running suppresses plasma acylated ghrelin concentrations but the limited literature on cycling suggests that acylated ghrelin is unchanged, perhaps because body mass is supported during cycling. It is important from a research and applied perspective to determine whether acylated ghrelin and hunger responses are exercise-mode specific. This study sought to examine this. Eleven recreationally active males fasted overnight and completed three 4-h trials: control, running, and cycling, in a random order. Participants rested throughout the control trial and ran or cycled at 70% of mode-specific maximal oxygen uptake for the first hour during exercise trials, resting thereafter. Hunger was measured every 0.5 h using visual analogue scales. Eight venous blood samples were collected to determine acylated ghrelin concentrations and a standardised meal was consumed at 3 h. Compared with the control trial, acylated ghrelin concentrations were suppressed to a similar extent at 0.5 and 1 h during the running (p < 0.005) and cycling (p < 0.001) trials. Area under the curve values for ghrelin concentration over time were lower during exercise trials versus control (Control: 606 ± 379; Running: 455 ± 356; Cycling: 448 ± 315 pg·mL-1·4 h-1; mean ± SD, p < 0.05). Hunger values did not differ significantly between trials but an interaction effect (p < 0.05) indicated a tendency for hunger to be suppressed during exercise. Thus, at similar relative exercise intensities, plasma acylated ghrelin concentrations are suppressed to a similar extent during running and cycling.

An update on accumulating exercise and postprandial lipaemia: Translating theory into practice

Miyashita, Masashi; Burns, Stephen F.; Stensel, David J.

Journal of Preventive Medicine and Public Health 46(SUPPL.1) 2013/01-2013/01

PubMedDOIScopus

Detail

ISSN:19758375

Outline:Over the last two decades, significant research attention has been given to the acute effect of a single bout of exercise on postprandial lipaemia. A large body of evidence supports the notion that an acute bout of aerobic exercise can reduce postprandial triacylglycerol (TAG) concentrations. However, this effect is short-lived emphasising the important role of regular physical activity for lowering TAG concentrations through an active lifestyle. In 1995, the concept of accumulating physical activity was introduced in expert recommendations with the advice that activity can be performed in several short bouts throughout the day with a minimum duration of 10 minutes per activity bout. Although the concept of accumulation has been widely publicised, there is still limited scientific evidence to support it but several studies have investigated the effects of accumulated activity on health-related outcomes to support the recommendations in physical activity guidelines. One area, which is the focus of this review, is the effect of accumulating exercise on postprandial lipaemia. We propose that accumulating exercise will provide additional physical activity options for lowering postprandial TAG concentrations relevant to individuals with limited time or exercise capacity to engage in more structured forms of exercise, or longer bouts of physical activity. The benefits of accumulated physical activity might translate to a reduced risk of cardiovascular disease in the long-term. Copyright © 2013 The Korean Society for Preventive Medicine.

Effects of sleep deprivation on autonomic and endocrine functions throughout the day and on exercise tolerance in the evening

Konishi Masayuki;Takahashi Masaki;Kim Hyeon Ki;Endo Naoya;Numao Shigeharu;Takagi Shun;Miyashita Masashi;Midorikawa Taishi;Suzuki Katsuhiko;Sakamoto Shizuo

Jpn. J. Phys. Fitness Sports Med. 62(1) p.69 - 692013-2013

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ISSN:0039-906X

Low-Volume Exercise Training and Vitamin E Supplementation Attenuates Oxidative Stress in Postmenopausal Women

TAKAHASHI Masaki;MIYASHITA Masashi;PARK Jong-Hwan;KAWANISHI Noriaki;BAE Seong-ryu;NAKAMURA Yoshio;SAKAMOTO Shizuo;SUZUKI Katsuhiko

Journal of Nutritional Science and Vitaminology 59(5) p.375 - 3832013-2013

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ISSN:0301-4800

Outline:The purpose of this study was to investigate the effects of low-volume exercise training (90 min/wk) and vitamin E supplementation on oxidative stress markers in postmenopausal women. The participants were non-randomly assigned the following four groups: control (C, n=8), vitamin E (S, n=8), exercise (Ex, n=6), or vitamin E and exercise (S+Ex, n=7). The S and S+Ex groups were instructed to take vitamin E (α-tocopherol, 300 mg/d) capsules for 12 wk. The exercise program of Ex and S+Ex groups consisted of walking for a 30-60 min/session 2 d per week for 12 wk. The serum derivatives of reactive oxygen metabolites concentrations were significantly decreased in the Ex, and S+Ex groups after 12 wk compared with the baseline values (three-factor ANOVA, an interaction between exercise and time, p<0.05). Conversely, serum biological antioxidant potential concentrations in the S and Ex groups were significantly higher at 12 wk than at the baseline, but not in the S+Ex group (three-factor ANOVA, an interaction between supplementation, exercise and time, p<0.05). Plasma thioredoxin concentrations in the S, Ex, and S+Ex groups were significantly higher at 12 wk than at the baseline values (three-factor ANOVA, interactions between exercise and time, and between supplementation, exercise and time, p<0.05). Our findings suggest that low-volume physical activity may improve resting oxidative stress status in postmenopausal women.

Effects of different modes of exercise on appetite and appetite-regulating hormones.

Kawano Hiroshi;Mineta Mayuko;Asaka Meiko;Miyashita Masashi;Numao Shigeharu;Gando Yuko;Ando Takafumi;Sakamoto Shizuo;Higuchi Mitsuru

Appetite 662013-2013

PubMedDOI

Detail

ISSN:1095-8304

Outline::The present study determined the changes in appetite and appetite-regulating gut hormones during and following bouts of both rope skipping exercise (weight-bearing) and bicycle ergometer exercise (non-weight-bearing). After a 12-h fast, 15 young men (mean ± SD, age 24.4 ± 1.7 yrs, maximal oxygen uptake 47.0 ± 6.5 mL/kg/min) participated in three 160 min trials: (1) rope skipping exercise (295 ± 40 kcal, 3 sets × 10 min with 5-min interval, then rested for 120 min); (2) bicycle ergometer exercise (288 ± 36 kcal, 3 sets × 10 min with 5-min interval, then rested for 120 min); (3) control (rested for 160 min). Ratings of perceived hunger and acylated ghrelin were suppressed and total peptide YY (PYY) were increased during and immediately after exercise in both exercise trials, but glucagon liked peptide-1 was not changed. Furthermore, suppressed hunger during rope skipping exercise was greater than that during bicycle ergometer exercise, but there were no differences in acylated ghrelin and total PYY. These results indicate that weight-bearing exercise has a greater exercise-induced appetite suppressive effect compared with non-weight-bearing exercise, and both forms of exercise lowered acylated ghrelin and increased total PYY, but the changes did not differ significantly between exercise modes.

Effects of intermittent physical activity on fat utilization over a whole day.

Ando Takafumi;Usui Chiyoko;Ohkawara Kazunori;Miyake Rieko;Miyashita Masashi;Park Jonghoon;Ezaki Osamu;Higuchi Mitsuru;Tanaka Shigeho

Medicine and science in sports and exercise 45(7) 2013-2013

PubMedDOI

Detail

ISSN:1530-0315

Outline:PURPOSE:We examined whether continuous and intermittent physical activity (PA) differentially influence fat utilization.;METHODS:This was a randomized crossover study. Nine healthy young male participants performed two 39-h (two nights, three days) PA sessions (continuous and intermittent exercise) in a respiratory chamber to measure energy expenditure (EE) and substrate oxidation. Participants used a stationary cycling ergometer continuously for 40 min and then 45 min in the continuous PA trial and for 5 min every 30 min 17 times in the intermittent PA trial. They consumed high-carbohydrate meals corresponding to predicted daily total EE for 3 d before entering the respiratory chamber and four high-fat meals corresponding to predicted total EE in the chamber.;RESULTS:Twenty-three-hour RER adjusted for sleeping RER on the preceding day was significantly lower in the intermittent PA trial than that in the continuous PA trial (P = 0.021). Twenty-three-hour RER adjusted for sleeping RER on the preceding day was correlated with accumulated consecutive minutes of METs ≤ 1.5 (3 min or more, r = 0.477; 5 min or more, r = 0.510; 10 min or more, r = 0.605).;CONCLUSIONS:The intermittent PA trial induced greater fat utilization than the continuous PA trial. The present study, therefore, suggests that intermittent PA has a beneficial effect on 24-h fat oxidation after consumption of a high-fat meal, which may help prevent weight gain over time.

An update on accumulating exercise and postprandial lipaemia: translating theory into practice.

Miyashita Masashi;Burns Stephen F;Stensel David J

Journal of preventive medicine and public health = Yebang Ŭihakhoe chi 46 Suppl 12013-2013

PubMedDOI

Detail

ISSN:2233-4521

Outline::Over the last two decades, significant research attention has been given to the acute effect of a single bout of exercise on postprandial lipaemia. A large body of evidence supports the notion that an acute bout of aerobic exercise can reduce postprandial triacylglycerol (TAG) concentrations. However, this effect is short-lived emphasising the important role of regular physical activity for lowering TAG concentrations through an active lifestyle. In 1995, the concept of accumulating physical activity was introduced in expert recommendations with the advice that activity can be performed in several short bouts throughout the day with a minimum duration of 10 minutes per activity bout. Although the concept of accumulation has been widely publicised, there is still limited scientific evidence to support it but several studies have investigated the effects of accumulated activity on health-related outcomes to support the recommendations in physical activity guidelines. One area, which is the focus of this review, is the effect of accumulating exercise on postprandial lipaemia. We propose that accumulating exercise will provide additional physical activity options for lowering postprandial TAG concentrations relevant to individuals with limited time or exercise capacity to engage in more structured forms of exercise, or longer bouts of physical activity. The benefits of accumulated physical activity might translate to a reduced risk of cardiovascular disease in the long-term.

Low-volume exercise training attenuates oxidative stress and neutrophils activation in older adults.

Takahashi Masaki;Miyashita Masashi;Kawanishi Noriaki;Park Jong-Hwan;Hayashida Harumi;Kim Hyun-Shik;Nakamura Yoshio;Sakamoto Shizuo;Suzuki Katsuhiko

European journal of applied physiology 113(5) 2013-2013

PubMedDOI

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ISSN:1439-6327

Outline::The purpose of this study was to investigate the effects of low-volume exercise training (100 min/week) on oxidative stress and neutrophils activation markers in older adults. Twenty-eight older adults (age range 65-78 years) were assigned into control (n = 14) or exercise (n = 14) groups. The exercise program consisted of walking 30-60 min/session, 2 days each week for 12 weeks. Blood samples were taken before starting the sessions (baseline) and when they ended. Fasting plasma and serum oxidative stress and inflammatory markers were measured using commercial kits. Cell surface expression of adhesion molecules on circulating leukocytes (CD66b and CD62L) was determined using flow cytometry. The concentrations of derivatives of reactive oxygen metabolites tended to be lower than the baseline values only in the exercise group (P = 0.05). The biological antioxidant potential, thioredoxin concentrations, and glutathione peroxidase activities significantly increased only in the exercise group (P < 0.05 for all). While CD66b expression tended to decrease only in the exercise group, CD62L expression significantly increased (P < 0.05). Our findings indicate that exercise training below the current recommended level of at least 150 min/week attenuates basal oxidative stress and neutrophil activation in older adults. Thus, our findings may encourage more people to incorporate a small amount of physical activity into their lives.

Associations between health-related physical fitness and obesity in Taiwanese youth.

Liao Yung;Chang Shao-Hsi;Miyashita Masashi;Stensel David;Chen Jui-Fu;Wen Liang-Tsai;Nakamura Yoshio

Journal of sports sciences 31(16) 2013-2013

PubMedDOI

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ISSN:1466-447X

Outline::This study examined associations between four health-related physical fitness measures and obesity in Taiwanese youth aged 10-18 years. Data from 13,500 school-aged youth were randomly selected from the "School Physical Fitness Database" of Taiwan by sex and age. Variables examined were height, body mass and performance on modified sit-and-reach (flexibility), bent-leg sit-up (abdominal muscular strength/endurance), standing long jump (lower body explosive strength) and distance run/walk (cardiorespiratory endurance). Adjusted logistic regression analyses were performed. Increased odds of being obese with decreased fitness levels were observed for lower body explosive strength and cardiorespiratory endurance in both sexes. The highest odds of being obese was found in the least fit quintile of cardiorespiratory endurance compared with the most fit quintile both in boys (Odds ratio, OR = 10.44; 95% confidence interval (CI), 7.94-13.73) and girls (OR = 5.40; 95% CI, 3.90-7.47). These findings suggest that in addition to cardiorespiratory fitness, lower body explosive strength is also associated with childhood and adolescent obesity.

Effects of low-volume walking programme and vitamin E supplementation on oxidative damage and health-related variables in healthy older adults.

Park Jong-Hwan;Miyashita Masashi;Takahashi Masaki;Kawanishi Noriaki;Bae Seong-Ryu;Kim Hyun-Shik;Suzuki Katsuhiko;Nakamura Yoshio

Nutrition & metabolism 10(1) 2013-2013

PubMedDOI

Detail

ISSN:1743-7075

Outline:BACKGROUND:Both exercise and vitamin E supplementation have been shown to reduce oxidative stress and cardiovascular disease risk in older adults, and when combined there is evidence suggesting that they act synergistically. The currently recommended amount of exercise for older adults is 150 min/week of moderate-intensity exercise; however, the minimum amount of exercise necessary to achieve health benefits is not known. The purpose of this study was to investigate the effects of 12 weeks of participation in a low-volume walking exercise programme (i.e. 90 min/week) combined with daily vitamin E supplementation on thiobarbituric acid reactive substances (TBARS) and oxidised low-density lipoprotein (LDL) concentrations in older adults.;METHODS:The participants were recruited from the following four groups separately: 1) control (CG, n = 14), 2) vitamin E supplementation (SG, n = 10), 3) walking (WG, n = 7), or 4) walking + supplementation (WSG, n = 7). In the CG, participants were advised to maintain their normal lifestyle during the study. Participants in both the SG and WSG received 450 IU (300 mg) /day of α-tocopherol for 12 weeks. The exercise programme for the WG and WSG consisted of two 30-60 minute sessions weekly for 12 weeks (average walking time was 44.5 ± 1.6 min/session). Blood samples were collected at baseline and at 12 weeks.;RESULTS:Delta plasma oxidised LDL concentrations did not differ among four groups (One-factor ANOVA, P = 0.116). However, negative delta plasma TBARS, a marker of oxidative damage, concentrations were observed in the WG, WSG and SG relative to the CG at the end of the study period (One-factor ANOVA, P = 0.001; post hoc tests; CG compared with WG, WSG and SG, P = 0.005; P = 0.021; P = 0.024, respectively).;CONCLUSION:These findings suggest that a low-volume of physical activity and/or vitamin E supplementation may be an effective intervention strategy for reducing TBARS concentrations of older adults.;TRIAL REGISTRATION:UMIN000008304.

The association between physical activity and sex-specific oxidative stress in older adults.

Takahashi Masaki;Miyashita Masashi;Park Jong-Hwan;Kim Hyun-Shik;Nakamura Yoshio;Sakamoto Shizuo;Suzuki Katsuhiko

Journal of sports science & medicine 12(3) 2013-2013

PubMed

Detail

ISSN:1303-2968

Outline::Oxidative stress increases with advancing age and is a mediator of several diseases including cancer, cardiovascular disease, and diabetes. Moreover, postmenopausal women have a lower estrogen concentration, which is associated with elevated oxidative stress. However, there is no definitive evidence regarding the relationship between daily physical activity and oxidative stress status in older adults, including postmenopausal women. Twenty-nine adults (age, 70.1 ± 1.0 years, mean ± SE; 12 women and 17 men) were examined in this cross-sectional study. Prior to blood collection, the participants were asked to wear a uniaxial accelerometer for 4 consecutive weeks to determine their level of physical activity. After a 48-h period of physical activity avoidance and a 10-h overnight fast, venous blood samples were obtained from each participant. Fasting plasma derivatives of reactive oxygen metabolites (d-ROMs) and malondialdehyde (MDA) concentrations of oxidative stress markers were negatively correlated with the amount of physical activity in women (d-ROMs; r = -0.708, p = 0.002) (MDA; r = -0.549, p = 0. 028), but not in men. Fasting plasma biological antioxidant potential of antioxidant capacity marker was positively correlated with the amount of physical activity in women (BAP; r = 0.657, p = 0.006) (GSH; r = 0.549, p = 0.028), but not in men. Moreover, superoxide dismutase activity of antioxidant capacity marker was positively correlated with the amount of physical activity in men (r = 0.627, p = 0.039), but not in women. There were no associations between physical activity and other oxidative stress markers (reduced and oxidized glutathione, glutathione peroxidise, thioredoxin). These findings suggest that regular physical activity may have a protective effect against oxidative stress by increasing total antioxidant capacity, especially in postmenopausal women. Key PointsIt is important to consider daily physical activity status when evaluating antioxidant capacity.Sex differences affect the alteration of oxidative stress markers induced by daily physical activity.Regular physical activity may have a protective effect against oxidative stress by increasing total antioxidant capacity, especially in postmenopausal women.

Low-volume exercise training and vitamin E supplementation attenuates oxidative stress in postmenopausal women.

Takahashi Masaki;Miyashita Masashi;Park Jong-Hwan;Kawanishi Noriaki;Bae Seong-ryu;Nakamura Yoshio;Sakamoto Shizuo;Suzuki Katsuhiko

Journal of nutritional science and vitaminology 59(5) 2013-2013

PubMed

Detail

ISSN:1881-7742

Outline::The purpose of this study was to investigate the effects of low-volume exercise training (90 min/wk) and vitamin E supplementation on oxidative stress markers in postmenopausal women. The participants were non-randomly assigned the following four groups: control (C, n=8), vitamin E (S, n=8), exercise (Ex, n=6), or vitamin E and exercise (S+Ex, n=7). The S and S+Ex groups were instructed to take vitamin E (α-tocopherol, 300 mg/d) capsules for 12 wk. The exercise program of Ex and S+Ex groups consisted of walking for a 30-60 min/session 2 d per week for 12 wk. The serum derivatives of reactive oxygen metabolites concentrations were significantly decreased in the Ex, and S+Ex groups after 12 wk compared with the baseline values (three-factor ANOVA, an interaction between exercise and time, p<0.05). Conversely, serum biological antioxidant potential concentrations in the S and Ex groups were significantly higher at 12 wk than at the baseline, but not in the S+Ex group (three-factor ANOVA, an interaction between supplementation, exercise and time, p<0.05). Plasma thioredoxin concentrations in the S, Ex, and S+Ex groups were significantly higher at 12 wk than at the baseline values (three-factor ANOVA, interactions between exercise and time, and between supplementation, exercise and time, p<0.05). Our findings suggest that low-volume physical activity may improve resting oxidative stress status in postmenopausal women.

Beneficial effects of combined olive oil ingestion and acute exercise on postprandial TAG concentrations in healthy young women

Sasahara, Chihoko; Burns, Stephen F.; Miyashita, Masashi; Stensel, David J.

British Journal of Nutrition 108(10) p.1773 - 17792012/11-2012/11

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ISSN:00071145

Outline:Foods high in monounsaturated fat, such as olive oil, and endurance exercise are both known to independently reduce postprandial TAG concentrations. We examined the combined effects of exercise and dietary fat composition on postprandial TAG concentrations in nine healthy pre-menopausal females (age 26.8 (sd 3.3) years, BMI 22.3 (sd 2.0)kg/m2). Each participant completed four, 2d trials in a randomised order: (1) butter-no exercise, (2) olive oil-no exercise, (3) butter-exercise, (4) olive oil-exercise. On day 1 of the exercise trials, participants walked or ran on a treadmill for 60min. On the no-exercise trials, participants rested on day 1. On day 2 of each trial, participants rested and consumed an olive oil meal (saturated fat 15% and unsaturated fat 85%) or a butter meal (saturated fat 71% and unsaturated fat 29%) for breakfast. Venous blood samples were obtained in the fasted state and for 6h postprandially on day 2. A significant main effect on physical activity (exercise or control) was obtained for plasma TAG concentration (three-way ANOVA, P=0.043), and the total area under the concentration v. time curve for TAG was 26% lower on the olive oil-exercise trial (4.40 (sd 0.40)mmol × 6h/l) than the butter-no exercise trial (5.91 (sd 1.01)mmol × 6h/l) (one-way ANOVA, P=0.029). These findings suggest that the combination of exercise and a preference for monounsaturated dietary fat intake in the form of olive oil may be most beneficial for reducing postprandial TAG concentrations. © 2012 The Authors.

Accumulating exercise and postprandial lipaemia

MIYASHITA Masashi;BURNS Stephen F;STENSEL David J

JPFSM 1(3) p.541 - 5452012/09-2012/09

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ISSN:21868131

Outline:Cardiovascular disease is a major cause of death in many developed countries. Impaired clearance of postprandial triacylglycerol has been associated with an increase in cardiovascular disease risk. Physical activity can reduce many cardiovascular disease risk factors including postprandial triacylglycerol concentrations. Public health guidelines suggest that physical activity can be accumulated in several short bouts throughout the day, with a minimum duration of 10 minutes per activity bout. Until recently, limited evidence was available to support the effect of accumulating physical activity on postprandial lipaemia. Thus, the authors conducted a series of investigations to examine the influence of accumulated physical activity on postprandial lipaemia. The implications of the research findings are discussed in keeping with practical guidance for those wishing to engage in exercise that will lower postprandial triacylglycerol concentrations.

A 12-week after-school physical activity programme improves endothelial cell function in overweight and obese children: a randomised controlled study

Park, Jong Hwan; Miyashita, Masashi; Kwon, Yoo Chan; Park, Hyun Tae; Kim, Eun Hee; Park, Jin Kee; Park, Ki Beam; Yoon, Suk Ran; Chung, Jin Woong; Nakamura, Yoshio; Park, Sang Kab

BMC Pediatrics 122012/07-2012/07

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Outline:Background: Endothelial dysfunction is associated with childhood obesity and is closely linked to the amount and function of endothelial progenitor cells. However, it remains unclear whether endothelial progenitor cells increase with after-school exercise in overweight and obese children. The purpose of this study was to investigate the effects of an after-school exercise programme on endothelial cell function in overweight and obese children.Methods: A total of 29 overweight/obese children (12.2 ± 0.1 years) were randomly divided into control (i.e. no after-school exercise, n = 14) and after-school exercise (n = 15) groups. The 12-week after-school exercise intervention consisted of 3 days of combined aerobic and resistance exercise per week. Each 80-minute exercise programme included 10 minutes of warm-up and 10 minutes of cool-down after school. CD34+ (a cell surface marker on hematopoietic stem cells), CD133+ (a cell surface marker on hematopoietic progenitor cells) and CD34+/CD133+ (considered as endothelial progenitor cells) were measured at baseline and after 12 weeks using flow cytometry.Results: Increased percentages of CD34+, CD133+ and CD34+/CD133+ cells were observed in the after-school exercise group (p = 0.018; p = 0.001; p = 0.002, respectively) compared with the control group. Carotid intima-media thickness decreased after 12 weeks in the after-school exercise group (p = 0.020) compared with the control group.Conclusions: This study provides preliminary evidence that a combined after-school exercise programme may represent an effective intervention strategy for improving vascular repair and endothelial cell function, leading to improved cardiovascular health in overweight and obese children.Trial registration: Current Controlled Trials ISRCTN19037201. © 2012 Park et al.; licensee BioMed Central Ltd.

Psychological, social, and environmental factors associated with utilization of senior centers among older adults in Korea

Kim, Hyun Shik; Miyashita, Masashi; Harada, Kazuhiro; Harada, Kazuhiro; Park, Jong Hwan; So, Jae Moo; Nakamura, Yoshio

Journal of Preventive Medicine and Public Health 45(4) p.244 - 2502012/07-2012/07

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ISSN:19758375

Outline:Objectives: The purpose of the study was to examine the relationships among the psychological, social, and environmental factors influencing the utilization of senior centers among older adults in Korea. Methods: A questionnaire survey was administered to two types of older adults who lived in Seoul, Korea: 262 older adults who used senior centers (3 places) and 156 older adults who did not use senior centers. Results: Our results showed clearly that the utilization of the senior centers in Korea is affected by higher self-efficacy (odds ratio [OR], 6.08; 95% confidence interval [CI], 3.31 to 12.32), higher perceived benefits (OR, 1.71; 95% CI, 1.16 to 4.36), lower perceived barriers (OR, 6.43; 95% CI, 3.07 to 11.45), higher family support (OR, 4.21; 95% CI, 2.02 to 8.77), and higher support from friends (OR, 4.08; 95% CI, 2.38 to 7.81). The results also showed that participants whose total travel time was 15 to 29 minutes (OR, 2.84; 95% CI, 1.21 to 3.64) or less than 14 minutes (OR, 4.68; 95% CI, 3.41 to 8.41) were more likely to use a senior center than those who had to travel more than 30 minutes. Conclusions: This study showed that the utilization of senior centers in Korea is affected by psychological, social, and environmental factors, specifically by self-efficacy, perceived benefits, perceived barriers, social support, convenience of transportation, and total travel time to the senior centers. The effects of longer-term utilization of the senior centers by non-users on health-related outcomes in a large population warrant attention. Copyright © 2012 The Korean Society for Preventive Medicine.

Effect of weight loss on maximal fat oxidation rate in obese men

Tsujimoto, Takehiko; Sasai, Hiroyuki; Sasai, Hiroyuki; Miyashita, Masashi; Eto, Miki; So, Rina; Ohkubo, Hiroyuki; Tanaka, Kiyoji

Obesity Research and Clinical Practice 6(2) 2012/04-2012/04

DOIScopus

Detail

ISSN:1871403X

Outline:Introduction: The hallmark features of obesity include insulin resistance and an impaired ability to oxidize lipids. As compared to exercise training, it remains relatively unclear if diet-induced weight loss can also induce fat metabolism. This study was undertaken to examine the effects of diet-induced weight loss on fat metabolism during a single session of exercise in middle-aged obese men. Methods: Fifteen obese men who were otherwise healthy (average age of 53.5 ± 6.9 yr and average body mass index of 27.8 ± 1.6 kg/m 2) participated in a 12-wk weight loss program primarily consisting of dietary modification. Maximal fat oxidation (MFO) rates, MFO per lean body mass (MFO LBM) and insulin resistance (HOMA-IR) were measured before and after the program. Participants performed a 24-min graded exercise test on a cycle ergometer, with 15-W increments every 4 min. Expired gas analysis was performed by indirect calorimetry, and nonprotein respiratory quotient equations were used to calculate fat oxidation rates. Results: The weight (-8.3 ± 3.8 kg), fat mass (-4.5 ± 1.9 kg), and lean body mass (-3.8 ± 2.4 kg) (P < 0.001 for all measurements) of the participants were decreased at the end of the 12-wk program. The MFO tended to increase by 19% (P = 0.08) and MFO LBM significantly increased by 28.8% (P = 0.02). Although insulin resistance also significantly decreased by 49% (P < 0.001), changes in fat oxidation variables did not correlate with changes in insulin resistance. Conclusion: Diet-induced weight loss improves fat metabolism with the improvement in insulin resistance. © 2011 Asian Oceanian Association for the Study of Obesity.

Appetite after rope skipping may differ between males and females

Kawano, Hiroshi; Motegi, Fumiya; Ando, Takafumi; Gando, Yuko; Mineta, Mayuko; Numao, Shigeharu; Miyashita, Masashi; Sakamoto, Shizuo; Higuchi, Mitsuru

Obesity Research and Clinical Practice 6(2) 2012/04-2012/04

DOIScopus

Detail

ISSN:1871403X

Outline:Background: When previously sedentary males and females follow the same exercise training programs with ad libitum feeding, males reduced body mass, but females do not, which suggests that females may increase appetite in response to exercise training compared with males. Rope skipping is traditional exercise modality that everyone had experienced during elementary school years in Japan. The purpose of this study was to determine whether there is a sex difference on appetite after acute rope skipping exercise. Methods and results: Thirteen healthy young males (22.5 ± 0.8 years, 172.2 ± 1.7 cm, 68.8 ± 2.3 kg, 18.4 ± 0.9%) and 13 females (22.9 ± 0.8 years, 160.6 ± 1.5 cm, 52.9 ± 1.6 kg, 25.0 ± 1.0%) participated in this study. Subjects consumed their lunch by 13:00, and performed a total of 20 min rope skipping exercise (2 sets × 10 min with 5 min interval) from 16:00. In females, appetite significantly increased from immediately after the exercise to 30 min after the exercise (from 13 mm to 30 mm), but remained unchanged in males. Although heart rate, ratings of perceived exertion, and lactate concentrations increased from baseline to immediately after exercise, there were no differences in the increase between males and females. Blood glucose concentrations at baseline and 30 min after exercise were higher in females than in males. Conclusion: These results indicated that rope skipping exercise induces an increase in appetite in females, but not in males. This increased appetite in females after the rope skipping exercise was induced without change in blood glucose concentrations. © 2011 Asian Oceanian Association for the Study of Obesity.

Effect of exercise timing on postprandial lipaemia

Miyashita, Masashi; Stensel, David J.; Burns, Stephen F.

Journal of Atherosclerosis and Thrombosis 19(2) p.205 - 2062012/03-2012/03

PubMedDOIScopus

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ISSN:13403478

Psychological, social, and environmental factors associated with utilization of senior centers among older adults in Korea.

Kim Hyun-Shik;Miyashita Masashi;Harada Kazuhiro;Park Jong-Hwan;So Jae-Moo;Nakamura Yoshio

Journal of preventive medicine and public health = Yebang Ŭihakhoe chi 45(4) 2012-2012

PubMedDOI

Detail

ISSN:2233-4521

Outline:OBJECTIVES:The purpose of the study was to examine the relationships among the psychological, social, and environmental factors influencing the utilization of senior centers among older adults in Korea.;METHODS:A questionnaire survey was administered to two types of older adults who lived in Seoul, Korea: 262 older adults who used senior centers (3 places) and 156 older adults who did not use senior centers.;RESULTS:Our results showed clearly that the utilization of the senior centers in Korea is affected by higher self-efficacy (odds ratio [OR], 6.08; 95% confidence interval [CI], 3.31 to 12.32), higher perceived benefits (OR, 1.71; 95% CI, 1.16 to 4.36), lower perceived barriers (OR, 6.43; 95% CI, 3.07 to 11.45), higher family support (OR, 4.21; 95% CI, 2.02 to 8.77), and higher support from friends (OR, 4.08; 95% CI, 2.38 to 7.81). The results also showed that participants whose total travel time was 15 to 29 minutes (OR, 2.84; 95% CI, 1.21 to 3.64) or less than 14 minutes (OR, 4.68; 95% CI, 3.41 to 8.41) were more likely to use a senior center than those who had to travel more than 30 minutes.;CONCLUSIONS:This study showed that the utilization of senior centers in Korea is affected by psychological, social, and environmental factors, specifically by self-efficacy, perceived benefits, perceived barriers, social support, convenience of transportation, and total travel time to the senior centers. The effects of longer-term utilization of the senior centers by non-users on health-related outcomes in a large population warrant attention.

Effect of Exercise Timing on Postprandial Lipaemia

Miyashita Masashi;Stensel David J;Burns Stephen F

The Journal of Japan Atherosclerosis Society 19(2) p.205 - 2062012-2012

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ISSN:1340-3478

A 12-week after-school physical activity programme improves endothelial cell function in overweight and obese children: a randomised controlled study.

Park Jong-Hwan;Miyashita Masashi;Kwon Yoo-Chan;Park Hyun-Tae;Kim Eun-Hee;Park Jin-Kee;Park Ki-Beam;Yoon Suk-Ran;Chung Jin-Woong;Nakamura Yoshio;Park Sang-Kab

BMC pediatrics 122012-2012

PubMed

Detail

ISSN:1471-2431

Outline:BACKGROUND:Endothelial dysfunction is associated with childhood obesity and is closely linked to the amount and function of endothelial progenitor cells. However, it remains unclear whether endothelial progenitor cells increase with after-school exercise in overweight and obese children. The purpose of this study was to investigate the effects of an after-school exercise programme on endothelial cell function in overweight and obese children.;METHODS:A total of 29 overweight/obese children (12.2 ± 0.1 years) were randomly divided into control (i.e. no after-school exercise, n = 14) and after-school exercise (n = 15) groups. The 12-week after-school exercise intervention consisted of 3 days of combined aerobic and resistance exercise per week. Each 80-minute exercise programme included 10 minutes of warm-up and 10 minutes of cool-down after school. CD34(+) (a cell surface marker on hematopoietic stem cells), CD133(+) (a cell surface marker on hematopoietic progenitor cells) and CD34(+)/CD133(+) (considered as endothelial progenitor cells) were measured at baseline and after 12 weeks using flow cytometry.;RESULTS:Increased percentages of CD34(+), CD133(+) and CD34(+)/CD133(+) cells were observed in the after-school exercise group (p = 0.018; p = 0.001; p = 0.002, respectively) compared with the control group. Carotid intima-media thickness decreased after 12 weeks in the after-school exercise group (p = 0.020) compared with the control group.;CONCLUSIONS:This study provides preliminary evidence that a combined after-school exercise programme may represent an effective intervention strategy for improving vascular repair and endothelial cell function, leading to improved cardiovascular health in overweight and obese children.;TRIAL REGISTRATION:Current Controlled Trials ISRCTN19037201.

Accumulating short bouts of running reduces resting blood pressure in young normotensive/pre-hypertensive men

Miyashita, Masashi; Burns, Stephen F.; Stensel, David J.

Journal of Sports Sciences 29(14) p.1473 - 14822011/11-2011/11

PubMedScopus

Detail

ISSN:02640414

Outline:In this study, we compared the effects of accumulated and continuous running on resting arterial blood pressure. Ten normotensive/pre-hypertensive men, aged 25.0±4.2 years (mean±s), participated in three 2-day trials at least one week apart in a randomized, repeated-measures design. On Day 1, participants rested (control) or ran at 70% of maximum oxygen uptake in either ten 3-min bouts (30 min rest between bouts) or one continuous 30-min bout. On Day 2, participants rested throughout the day. Blood pressure was measured at hourly intervals throughout Days 1 and 2. Mean resting systolic blood pressure on Day 2 was 6% lower during the accumulated and continuous running trials compared with the control trial (110±6 vs. 110±8 vs. 117±6 mmHg respectively; Pxlt;0.05), but there were no differences in resting diastolic blood pressure among the three trials (70±7 vs. 69±6 vs. 70±5 mmHg respectively). These findings demonstrate that accumulating 30 min of running throughout the day in short bouts is as effective as 30 min of continuous running for reducing resting systolic blood pressure on the next day in young normotensive/pre-hyptertensive men. © 2011 Taylor & Francis.

Use of senior center and the health-related quality of life in Korean older adults

Kim, Hyun Shik; Harada, Kazuhiro; Harada, Kazuhiro; Miyashita, Masashi; Lee, Eun A.; Park, Jin Kee; Nakamura, Yoshio

Journal of Preventive Medicine and Public Health 44(4) p.149 - 1562011/07-2011/07

PubMedDOIScopus

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ISSN:19758375

Outline:Objective: The purpose of the present study was to examine the relationship between the use of senior center and health-related quality of life in Korean older adults. Methods: A questionnaire survey was conducted to two types of older adults who lived in Busan, Korea: 154 older adults who used a senior center and 137 older adults who did not use a senior center. The Korean version of short-form 36-item health survey was administered to assess the health-related quality of life. Demographic variables were obtained from a questionnaire. These were gender, age, family status, marital status, education, monthly income, present illness, body mass index and physical activity. Results: The 8-domain scales of physical function and role-physical were significantly higher in the users of the senior center compared with the non-users (F=4.87, p=0.027 and F=7.02, p=0.009, respectively). The 8-domain scales of vitality was also significantly higher in the users of the senior center compared with the non-users (F=7.48, p=0.007). Conclusions: The present study showed that the users of the senior center have higher physical function, role-physical and vitality compared with the non-users. These findings suggest that although the results are unable to specify causal relationships using the senior center may lead to some improvement in health-related quality of life.

Effects of Sleep Deprivation on the Sympathoadrenal System and Hypothalamic-Pituitary-Adrenocortical Axis Using Salivary Stress Markers

KONISHI Masayuki;TAKAHASHI Masaki;ENDO Naoya;NUMAO Shigeharu;TAKAGI Shun;MIYASHITA Masashi;MIDORIKAWA Taishi;SUZUKI Katsuhiko;SAKAMOTO Shizuo

41(3) p.129 - 1352011/06-2011/06

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ISSN:02867052

The effects of 30 min of exercise on cardiovascular disease risk factors in healthy and obese individuals

Miyashita, Masashi; Stensel, David J.; Burns, Stephen F.; Sasai, Hiroyuki; Tanaka, Kiyoji

Atherosclerosis 216(2) p.496 - 4972011/06-2011/06

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ISSN:00219150

Oxidised Low-Density Lipoprotein Concentrations and Physical Activity Status in Older Adults: The WASEDA Active Life Study

Park Jong-Hwan;Miyashita Masashi;Takahashi Masaki;Harada Kazuhiro;Takaizumi Kanae;Kim Hyun-Shik;Suzuki Katsuhiko;Nakamura Yoshio

The Journal of Japan Atherosclerosis Society 18(7) p.568 - 5732011-2011

PubMedDOICiNiiScopus

Detail

ISSN:1340-3478

Outline:Aim: Oxidised low-density lipoprotein (LDL) is considered a risk marker for cardiovascular disease. However, it remains unclear whether oxidised LDL concentrations differ with the physical activity status in older adults. The purpose of this study was to examine the relationship between the amount of physical activity and oxidised LDL in older adults.
Methods: Twenty-seven older adults (aged 69.9±4.3 years, mean±SD.; 16 female and 11 male) were analysed in the cross-sectional design. Prior to blood collection, participants were asked to wear an uniaxial accelerometer for 4 consecutive weeks to determine the physical activity status. After a 48-h period of physical activity avoidance and a 10-h overnight fast, fasting venous blood samples were obtained from each participant.
Results: Fasting plasma oxidised LDL concentrations and plasma monocyte chemoattractant pro-tein-1 concentrations were negatively correlated with the amount of physical activity (r=−0.409, p=0.034; r=−0.385, p=0.047, respectively).
Conclusions: This study demonstrates that regular physical activity may play a protective role in the oxidation of LDL in older adults.

Oxidised low-density lipoprotein concentrations and physical activity status in older adults: the WASEDA active life study.

Park Jong-Hwan;Miyashita Masashi;Takahashi Masaki;Harada Kazuhiro;Takaizumi Kanae;Kim Hyun-Shik;Suzuki Katsuhiko;Nakamura Yoshio

Journal of atherosclerosis and thrombosis 18(7) 2011-2011

PubMed

Detail

ISSN:1880-3873

Outline:AIM:Oxidised low-density lipoprotein (LDL) is considered a risk marker for cardiovascular disease. However, it remains unclear whether oxidised LDL concentrations differ with the physical activity status in older adults. The purpose of this study was to examine the relationship between the amount of physical activity and oxidised LDL in older adults.;METHODS:Twenty-seven older adults (aged 69.9 ± 4.3 years, mean ± SD.; 16 female and 11 male) were analysed in the cross-sectional design. Prior to blood collection, participants were asked to wear an uniaxial accelerometer for 4 consecutive weeks to determine the physical activity status. After a 48-h period of physical activity avoidance and a 10-h overnight fast, fasting venous blood samples were obtained from each participant.;RESULTS:Fasting plasma oxidised LDL concentrations and plasma monocyte chemoattractant pro-tein-1 concentrations were negatively correlated with the amount of physical activity (r=-0.409, p=0.034; r=-0.385, p=0.047, respectively).;CONCLUSIONS:This study demonstrates that regular physical activity may play a protective role in the oxidation of LDL in older adults.

Use of senior center and the health-related quality of life in Korean older adults.

Kim Hyun Shik;Harada Kazuhiro;Miyashita Masashi;Lee Eun A;Park Jin Kee;Nakamura Yoshio

Journal of preventive medicine and public health = Yebang Ŭihakhoe chi 44(4) 2011-2011

PubMedDOI

Detail

ISSN:2233-4521

Outline:OBJECTIVE:The purpose of the present study was to examine the relationship between the use of senior center and health-related quality of life in Korean older adults.;METHODS:A questionnaire survey was conducted to two types of older adults who lived in Busan, Korea: 154 older adults who used a senior center and 137 older adults who did not use a senior center. The Korean version of short-form 36-item health survey was administered to assess the health-related quality of life. Demographic variables were obtained from a questionnaire. These were gender, age, family status, marital status, education, monthly income, present illness, body mass index and physical activity.;RESULTS:The 8-domain scales of physical function and role-physical were significantly higher in the users of the senior center compared with the non-users (F=4.87, p=0.027 and F=7.02, p=0.009, respectively). The 8-domain scales of vitality was also significantly higher in the users of the senior center compared with the non-users (F=7.48, p=0.007).;CONCLUSIONS:The present study showed that the users of the senior center have higher physical function, role-physical and vitality compared with the non-users. These findings suggest that although the results are unable to specify causal relationships using the senior center may lead to some improvement in health-related quality of life.

Accumulating short bouts of running reduces resting blood pressure in young normotensive/pre-hypertensive men.

Miyashita Masashi;Burns Stephen F;Stensel David J

Journal of sports sciences 29(14) 2011-2011

PubMedDOI

Detail

ISSN:1466-447X

Outline::In this study, we compared the effects of accumulated and continuous running on resting arterial blood pressure. Ten normotensive/pre-hypertensive men, aged 25.0 ± 4.2 years (mean ± s), participated in three 2-day trials at least one week apart in a randomized, repeated-measures design. On Day 1, participants rested (control) or ran at 70% of maximum oxygen uptake in either ten 3-min bouts (30 min rest between bouts) or one continuous 30-min bout. On Day 2, participants rested throughout the day. Blood pressure was measured at hourly intervals throughout Days 1 and 2. Mean resting systolic blood pressure on Day 2 was 6% lower during the accumulated and continuous running trials compared with the control trial (110 ± 6 vs. 110 ± 8 vs. 117 ± 6 mmHg respectively; P < 0.05), but there were no differences in resting diastolic blood pressure among the three trials (70 ± 7 vs. 69 ± 6 vs. 70 ± 5 mmHg respectively). These findings demonstrate that accumulating 30 min of running throughout the day in short bouts is as effective as 30 min of continuous running for reducing resting systolic blood pressure on the next day in young normotensive/pre-hyptertensive men.

Physical activity status and postprandial lipaemia in older adults.

Miyashita M;Park J H;Takahashi M;Burns S;Kim H S;Suzuki K;Nakamura Y

International journal of sports medicine 32(11) p.829 - 8342011-2011

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ISSN:1439-3964

Outline::Physical activity-induced lowering of postprandial lipaemia is short-lived. However, little is known regarding the role of physical activity status on postprandial lipaemia. The purpose of the present study was to compare postprandial triacylglycerol concentrations in active and inactive older adults. A total of 26 older adults (aged 69.8±0.9 years, mean±SEM; 10 male and 16 female) were analysed in a cross-sectional design. Based on accelerometer data, participants were divided into either the active group (≥150 min/week of moderate-intensity physical activity, N=15) or the inactive group (<150 min/week of moderate-intensity physical activity, N=11). After a 48-h period of physical activity avoidance and a 10-h overnight fast, participants consumed a test meal of moderate fat content (35%). Capillary blood samples were collected in the fasted state and at 2, 4, and 6 h postprandially. After adjusting for fasting triacylglycerol concentrations, body mass, body mass index and waist circumference, postprandial capillary triacylglycerol concentrations were significantly lower in the active than inactive group ( P=0.046). These findings demonstrate that regular physical activity lowers postprandial lipaemia independent of the acute effects of physical activity in older adults.

Post-prandial capillary triacylglycerol responses to moderate exercise in centrally obese middle-aged men

Miyashita, Masashi; Sasai, Hiroyuki; Tanaka, Kiyoji

Journal of Sports Sciences 28(12) p.1269 - 12752010/10-2010/10

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ISSN:02640414

Outline:In this study, we wished to determine whether 30 min of moderate-intensity exercise, corresponding to minimal recommended guidelines, attenuates post-prandial capillary triacylglycerol concentrations in obese men. Ten middle-aged, centrally obese men (age 46 ± 2 years, body mass index 31.6 ± 1.0 kg · m-2, waist circumference 104.6 ± 2.2 cm) completed two 2-day trials (exercise and control) at least one week apart in a randomized, repeated-measures design. On day 1, participants either cycled for 30 min at approximately 60% of maximal heart rate in the afternoon or rested (no exercise). On day 2 of both trials, after a 10-h overnight fast, participants consumed a test meal of moderate fat content (35%) for breakfast. Capillary blood samples were collected in the fasted state (0 h) and at 2, 4, and 6 h post-prandially on day 2. Total area under the capillary triacylglycerol concentration versus time curve was significantly lower on the exercise than control trial (P = 0.023). One 30-min session of moderate-intensity cycling is effective in lowering post-prandial capillary triacylglycerol concentration in obese middle-aged men. These findings may have important implications for exercise recommendations as a means to reduce the risk of cardiovascular disease if such exercise is performed for an extended period. © 2010 Taylor & Francis.

Exercise-Induced Effects on Lowering Postprandial Triacylglycerol

MIYASHITA Masashi

Journal of Japan Society for the Study of Obesity 16(2) p.100 - 1042010/08-2010/08

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ISSN:1343229X

Contribution of exercise and diet to weight reduction : from the standpoint of lifestyle modification

Japanese journal of clinical sports medicine 18(2) p.251 - 2532010/04-2010/04

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ISSN:13464159

Pre-Heparin Serum Lipoprotein Lipase Concentrations in Obese Men of Contrasting Physical Activity Status: A Preliminary Study

Miyashita Masashi;Eto Miki;Sasai Hiroyuki;Tsujimoto Takehiko;So Rina;Nomata Yasuhiro;Tanaka Kiyoji

The Journal of Japan Atherosclerosis Society 17(10) p.1110 - 11122010-2010

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ISSN:1340-3478

Twelve-Week Jogging Training Increases Pre-Heparin Serum Lipoprotein Lipase Concentrations in Overweight/Obese Middle-Aged Men

Miyashita Masashi;Eto Miki;Sasai Hiroyuki;Tsujimoto Takehiko;Nomata Yasuhiro;Tanaka Kiyoji

The Journal of Japan Atherosclerosis Society 17(1) p.21 - 292010-2010

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ISSN:1340-3478

Outline:Aim: Enhancement of lipoprotein lipase (LPL) activity through drug administration has been shown to increase pre-heparin serum LPL concentrations; however, pre-heparin serum LPL responses to exercise training have not been determined. The present study was undertaken to investigate the effects of 12 weeks of supervised aerobic exercise training on pre-heparin serum LPL concentrations in overweight/obese men.
Methods: Fifteen overweight/obese middle-aged men were assigned to one of two 12-week supervised exercise interventions: a walking group (eight participants gradually increasing brisk walking to 60 min/day 3 days a week) or a jogging group (seven participants gradually increasing jogging to 60 min/day 3 days a week). All participants maintained ad libitum diets. Blood samples were collected at baseline and immediately after 12 weeks. The primary outcome was pre-heparin serum LPL.
Results: Pre-heparin serum LPL concentrations were increased in the jogging group after 12 weeks compared with the baseline values (mean±SEM: 37.6±4.7 vs. 51.0±6.6 ng/mL, respectively, p= 0.033). In the walking group, pre-heparin serum LPL concentrations remained unchanged after 12 weeks.
Conclusions: This study demonstrates that 12 weeks of jogging training increases pre-heparin serum LPL concentrations in overweight/obese middle-aged men.

Influence of prolonged treadmill running on appetite, energy intake and circulating concentrations of acylated ghrelin.

King James A;Miyashita Masashi;Wasse Lucy K;Stensel David J

Appetite 54(3) 2010-2010

PubMedDOI

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ISSN:1095-8304

Outline::The effects of prolonged treadmill running on appetite, energy intake and acylated ghrelin (an appetite stimulating hormone) were examined in 9 healthy males over the course of 24h. Participants completed 2 experimental trials (exercise and control) in a randomised-crossover fashion. In the exercise trial participants ran for 90 min at 68.8 + or - 0.8% of maximum oxygen uptake followed by 8.5 h of rest. Participants returned to the laboratory on the following morning to provide a fasting blood sample and ratings of appetite (24 h measurement). No exercise was performed on the control trial. Appetite was measured within the laboratory using visual analogue scales and energy intake was assessed from ad libitum buffet meals. Acylated ghrelin was determined from plasma using an ELISA assay. Exercise transiently suppressed appetite and acylated ghrelin but each remained no different from control values in the hours afterwards. Furthermore, despite participants expending 5324 kJ during exercise there was no compensatory increase in energy intake (24 h energy intake; control 17,191 kJ, exercise 17,606 kJ). These findings suggest that large energy deficits induced by exercise do not lead to acute compensatory responses in appetite, energy intake or acylated ghrelin.

Acute effects of accumulating exercise on postprandial lipemia and C-reactive protein concentrations in young men

Miyashita, Masashi; Miyashita, Masashi; Burns, Stephen F.; Burns, Stephen F.; Stensel, David J.

International Journal of Sport Nutrition and Exercise Metabolism 19(6) p.569 - 5822009/12-2009/12

PubMedScopus

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ISSN:1526484X

Outline:The current study investigated the acute effects of accumulating short bouts of running on circulating concentrations of postprandial triacylglycerol (TAG) and C-reactive protein (CRP). Ten men, age 21-32 yr, completed two 1-d trials. On 1 occasion participants ran at 70% of maximum oxygen uptake in six 5-min bouts (i.e., 8:30, 10, and 11:30 a.m. and 1, 2:30, and 4 p.m.) with 85 min rest between runs. On another occasion participants rested throughout the day. In both trials, participants consumed test meals at 9 a.m. and 12 p.m. In each trial, venous blood samples were collected at 8:30, 10, and 11:30 a.m. and 1, 2:30, 4, and 5:30 p.m. for plasma TAG measurement and at 8:30 a.m. and 5:30 p.m. for serum CRP measurement. Total area under the curve for plasma TAG concentration versus time was 10% lower on the exercise trial than the control trial (M ± SEM: 13.5 ± 1.8 vs. 15.0 ± 1.9 mmol · 9 hr-1 · L-1; p = .004). Serum CRP concentrations did not differ between trials or over time. This study demonstrates that accumulating short bouts of running reduces postprandial plasma TAG concentrations (a marker for cardiovascular disease risk) but does not alter serum CRP concentrations. © Human Kinetics, Inc.

Aerobic exercise and postprandial lipemia: Issues on volume and frequency of exercise

Miyashita, Masashi; Stensel, David

Medicine and Science in Sports and Exercise 41(4) 2009/04-2009/04

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ISSN:01959131

NO EFFECTS OF SHORT-TERM VITAMIN E SUPPLEMENTATION ON INFLAMMATORY AND MUSCLE DAMAGE MARKERS AFTER REPEATED BOUTS OF PROLONGED EXERCISE IN HEALTHY YOUNG MEN

MIYASHITA MASASHI;PARK JONG-HOON

Japanese Journal of Physical Fitness and Sports Medicine 57(3) p.383 - 3912008/06-2008/06

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ISSN:0039906X

Outline:After a single bout of prolonged strenuous exercise, inflammatory and muscle damage markers increase. The present study investigated whether vitamin E supplementation can attenuate inflammatory (C-reactive protein (CRP) and interleukin-6 (IL〜6)) and muscle damage (creatine kinase (CK) and lactate dehydrogenese (LDH)) markers after prolonged repeated bouts of cycling in healthy young men. Eight young males (aged 21-30 y) were received both vitamin E supplement (300 mg/day) and placebo (control) for 14 days separated by at least an interval of 1 month in a randomised, counterbalanced design. On day 12 of both trials, subjects cycled at 80% of maximal heart rate in two, 90-min bouts (150min rest between each). Blood samples were collected on days 1 (baseline), 12 (pre- and post-exercise 1 and pre- and post-exercise 2), 13, 14, and 15. After 14 days of supplementation, serum α-tocopherol concentrations increased in the vitamin E trial (P<0.0005) but not the placebo trial. Serum CRP concentrations did not differ between trials and did not significantly change over the observation period in both trials. Serum IL-6, CK, and LDH concentrations increased (P≤0.024) in response to repeated bouts of exercise in both trials but did not differ between trials. The study demonstrates that short-term vitamin E supplementation appears to have no effect on attenuating markers of inflammatory and muscle damage in response to repeated bouts of prolonged exercise in healthy young men.

Different patterns of physical activity are equally effective in reducing postprandial triacylglycerol concentrations in young men

Miyashita, Masashi; Burns, Stephen F.; Stensel, David J.

Japanese Journal of Physical Fitness and Sports Medicine 57(1) 2008/02-2008/02

Scopus

Detail

ISSN:0039906X

Outline:Background: Public health guidelines on physical activity recommend that adults accumulate 30 minutes of moderate intensity activity on most, preferably all, days of week (Department of Health UK, 2004; Pate et al., 1995). The guidelines also included the caveat that the minimum duration of any one bout should be 10 minutes. However, if total energy expenditure is the most important factor for health benefits, as is suspected (Pate et al., 1995), then the duration of exercise should not matter provided that sufficient energy is expended. The acute effect of a total of 30 minutes of accumulated exercise in bouts shorter than 10 minutes per session throughout the day on postprandial triacylglycerol concentrations has not been determined. Here we report the findings from two studies which compare the effects of accumulating ten, three-minute bouts of exercise versus one, 30-minute bout of exercise on postprandial triacylglycerol concentrations. Methods: Ten male subjects, aged 23±1 years (mean±SE) (running study) and 15 male subjects, aged 25±1 years (walking study) completed three, 2-day trials at least one week apart in a randomised, repeated measures design. On day 1, subjects rested (no exercise) or ran at 70% of maximum oxygen uptake (running study)/walked briskly at a self-selected pace (walking study) in either ten, three-minute bouts (i.e. 09:30 AM to 15:30 PM) with 30 minutes rest between each, or one continuous 30-minute bout (i.e. 15:00 to 15:30 PM). On day 2, subjects rested and consumed test meals (0.69 g fat, 0.95 g carbohydrate, 0.31 g protein, and 46 kJ/kg body mass) for breakfast and lunch. Venous blood samples were collected in the fasted state and for 7 h postprandially on day 2. Results: In both the running and the walking studies postprandial plasma triacylglycerol concentrations were significantly (two-way ANOVA, P<0.05) lower throughout day 2 on the accumulated and continuous exercise trials compared with the control trials: time-averaged postprandial concentrations 1.86 ± 0.32 versus 1.79 ± 0.33 versus 2.37 ± 0.45 mmol/L respectively for the running study and 1.33 ± 0.09 versus 1.36 ± 0.11 versus 1.62 ± 0.15 mmol/L respectively for the walking study. There were no significant differences between the accumulated and continuous exercise trials. Conclusion: These data demonstrate that: 1) accumulated physical activity is at least as effective as continuous physical activity in reducing postprandial plasma triacylglycerol concentrations in young men and 2) both walking and running are effective in reducing postprandial plasma triacylglycerol concentrations in young men.

Changes in substrate oxidation persist overnight after a marathon race

Iwayama, Kaito; Miyashita, Masashi; Tokuyama, Kumpei

Japanese Journal of Physical Fitness and Sports Medicine 57(1) p.163 - 1682008/02-2008/02

Scopus

Detail

ISSN:0039906X

CHANGES IN SUBSTRATE OXIDATION PERSIST OVERNIGHT AFTER A MARATHON RACE

IWAYAMA KAITO;MIYASHITA MASASHI;TOKUYAMA KUMPEI

Japanese Journal of Physical Fitness and Sports Medicine 57(1) p.163 - 1682008/02-2008/02

CiNii

Detail

ISSN:0039906X

Effects of continuous versus accumulated activity patterns on postprandial triacylglycerol concentrations in obese men.

Miyashita M

International journal of obesity (2005) 32(8) 2008-2008

PubMedDOI

Detail

ISSN:1476-5497

Outline:OBJECTIVE:There is limited information regarding the effects of short (<10 min) bouts of activity on postprandial lipaemia and no studies are available regarding the effects of short bouts of activity on postprandial lipaemia in obese men. The objective of this study was to compare the effects of accumulating ten, 3-min bouts of exercise versus one 30 min bout of exercise on postprandial serum triacylglycerol (TAG) concentrations in obese men.;DESIGN:Each subject completed three 2-day trials at least 1 week apart in a randomized, repeated-measures design. On day 1, subjects rested (no exercise) or cycled at 60% of maximum heart rate in either ten, 3-min bouts (30 min rest between each), or one continuous 30-min bout. On day 2 of each trial, after an overnight fast, the subjects consumed a standardized test meal for breakfast. Venous blood samples were obtained in the fasted state (0 h), and 2, 4 and 6 h postprandially on day 2.;SUBJECTS:Eight sedentary men (age: 27+/-2 years) with body mass index between 25 and 37 kg/m(2).;MEASUREMENTS:Postprandial TAG, non-esterified fatty acids, 3-hydroxybutyrate, insulin and glucose were determined.;RESULTS:Total area under the postprandial serum TAG concentrations versus time curve was 18% (P=0.042) and 15% (P=0.032) lower throughout day 2 of both the accumulated exercise trial and the continuous exercise trial, respectively, compared with the control trial with little difference between exercise trials.;CONCLUSION:At 30 min of moderate cycling (0.87 MJ per 30 min) accumulated in short bouts is equally effective in reducing postprandial serum TAG concentrations as one continuous 30 min bout of cycling in obese men.

Accumulating short bouts of brisk walking reduces postprandial plasma triacylglycerol concentrations and resting blood pressure in healthy young men.

Miyashita Masashi;Burns Stephen F;Stensel David J

The American journal of clinical nutrition 88(5) 2008-2008

PubMed

Detail

ISSN:1938-3207

Outline:BACKGROUND:Physical activity recommendations promote the accumulation of aerobic activity in bouts of >or=10 min. It is important to determine whether shorter bouts of activity can influence health.;OBJECTIVE:We compared the effects of accumulating ten 3-min bouts of brisk walking with those of one 30-min bout of brisk walking on postprandial plasma triacylglycerol concentrations and resting blood pressure.;DESIGN:Fifteen healthy young men completed three 2-d trials >or=1 wk apart in a randomized, repeated-measures design. On day 1, subjects rested (no exercise) or walked briskly in either ten 3-min bouts (30 min rest between each) or one 30-min bout (gross energy expenditure: 1.10 MJ/30 min). On day 2, subjects rested and consumed high-fat test meals for breakfast and lunch.;RESULTS:On day 2 area under the plasma triacylglycerol concentration over time curve was 16% lower on the accumulated and continuous brisk walking trials than on the control trial (x +/- SEM: 9.98 +/- 0.67 compared with 9.99 +/- 0.76 compared with 11.90 +/- 1.02 mmol x 7h/L, respectively; P = 0.005, one-factor ANOVA). Resting systolic blood pressure was 6-7% lower throughout day 2 on the accumulated and continuous trials than on the control trial (109 +/- 1 compared with 110 +/- 1 compared with 117 +/- 2 mm Hg, respectively; P < 0.0005).;CONCLUSION:Accumulating 30 min of brisk walking in short (3-min) bouts is equally effective in reducing postprandial lipemia and systolic blood pressure as is one continuous 30-min bout.

Moderate exercise reduces serum triacylglycerol concentrations but does not affect pre-heparin lipoprotein lipase concentrations after a moderate-fat meal in young men.

Miyashita Masashi;Tokuyama Kumpei

The British journal of nutrition 99(5) 2008-2008

PubMed

Detail

ISSN:0007-1145

Outline::Aerobic exercise has been shown to lower postprandial TAG concentrations after a meal(s) of high-fat content. This study examined the effects of moderate-intensity cycling on postprandial TAG concentrations and pre-heparin lipoprotein lipase concentrations after subjects consumed a meal of moderate-fat content (45 % of total energy). Twelve male subjects, aged 24 (sem 1) years, completed two 2 d trials (exercise and control) at least 1 week apart in a randomised, repeated measures design. On day 1, subjects either cycled for 30 min at 65 % of maximum heart rate in the afternoon or rested (no exercise). On day 2 of both trials, after an overnight stay with an 11 h fast, subjects consumed a test meal of moderate-fat content (0.61 g fat, 1.34 g carbohydrate, 0.37 g protein and 51 kJ energy/kg body mass) for breakfast. Blood samples were collected at baseline (before the exercise or at an equivalent time-point during the control trial on day 1), in the fasted state (0 h) and at 2, 4 and 6 h postprandially on day 2. The total and incremental areas under the serum TAG concentration v. time curve were 30 % (P = 0.039) and 33 % (P = 0.012) lower on the exercise trial compared with the control trial, respectively. Serum pre-heparin lipoprotein lipase concentrations did not differ between the exercise and control trials. These findings demonstrate that 30 min of moderate-intensity cycling performed the day before a meal of moderate-fat content is effective at lowering postprandial serum TAG concentrations but does not affect serum pre-heparin lipoprotein lipase concentrations in young men.

Multiple bouts of resistance exercise and postprandial triacylglycerol and serum C-reactive-protein concentrations

Burns, Stephen F.; Burns, Stephen F.; Miyashita, Masashi; Miyashita, Masashi; Ueda, Chihoko; Ueda, Chihoko; Stensel, David J.

International Journal of Sport Nutrition and Exercise Metabolism 17(6) p.556 - 5732007/12-2007/12

PubMedScopus

Detail

ISSN:1526484X

Outline:The present study examined how multiple bouts of resistance exercise, performed over 1 d, influence 2 risk factors - postprandial triacylglycerol (TAG) and serum C-reactive-protein (CRP) concentrations - associated with coronary heart disease. Twenty-four men age 23.5 (SD 3.4) y completed two 2-d trials, exercise and control, at least 1 wk apart in a counterbalanced randomized design. On day 1 of the exercise trials participants completed 20 sets of 15 repetitions of 5 different resistance exercises divided into five 45-min bouts of exercise - 100 sets and 1500 repetitions in total for all exercises. Exercises were performed at 30-40% of 1-repetition maximum. Blood samples were taken before and after exercise. On day 1 of the control trial participants were inactive, with blood samples taken at time points corresponding to the exercise trial. On day 2 of both trials participants consumed a test meal (0.89 g fat, 1.23 g carbohydrate, 0.4 g protein, 60 kJ per kg body mass). Blood samples were obtained fasted and for 6 h postprandially. Total area under the postprandial TAG concentration versus time curve was 12% lower in the exercise than in the control trial (8.76 [3.54] vs. 9.94 [4.31] mmol·L-1·6 h, respectively; P = 0.037). Serum CRP concentrations did not change over the 2 d in the control trial but increased in the exercise trial: trial x time interaction (P = 0.028). Multiple bouts of resistance exercise reduce postprandial TAG concentrations but increase serum CRP concentrations. The extent to which these findings are clinically relevant requires further study. © 2007 Human Kinetics, Inc.

Exercise-induced suppression of acylated ghrelin in humans.

Broom D R;Stensel D J;Bishop N C;Burns S F;Miyashita M

Journal of applied physiology (Bethesda, Md. : 1985) 102(6) 2007-2007

PubMed

Detail

ISSN:8750-7587

Outline::Ghrelin is an orexigenic hormone secreted from endocrine cells in the stomach and other tissues. Acylation of ghrelin is essential for appetite regulation. Vigorous exercise induces appetite suppression, but this does not appear to be related to suppressed concentrations of total ghrelin. This study examined the effect of exercise and feeding on plasma acylated ghrelin and appetite. Nine male subjects aged 19-25 yr participated in two, 9-h trials (exercise and control) in a random crossover design. Trials began at 0800 in the morning after an overnight fast. In the exercise trial, subjects ran for 60 min at 72% of maximum oxygen uptake between 0800 and 0900. After this, they rested for 8 h and consumed a test meal at 1100. In the control trial, subjects rested for 9 h and consumed a test meal at 1100. Area under the curve values for plasma acylated ghrelin concentration (assessed from venous blood samples) were lower over the first 3 h and the full 9 h of the exercise trial compared with the control trial: 317+/-135 vs. 510+/-186 pg.ml(-1).3 h and 917+/-342 vs. 1,401+/-521 pg.ml(-1).9 h (means+/-SE) respectively (P<0.05). Area under the curve values for hunger (assessed using a visual scale) were lower over the first 3 h of the exercise trial compared with the control trial (P=0.013). These findings demonstrate that plasma acylated ghrelin concentration and hunger are suppressed during running.

A single session of treadmill running has no effect on plasma total ghrelin concentrations.

Burns Stephen F;Broom David R;Miyashita Masashi;Mundy Claire;Stensel David J

Journal of sports sciences 25(6) 2007-2007

PubMed

Detail

ISSN:0264-0414

Outline::Ghrelin is a hormone that stimulates hunger. Intense exercise has been shown to temporarily suppress hunger after exercise. In the present study, we investigated whether post-exercise hunger suppression is mediated by reduced plasma total ghrelin concentrations. Nine men and nine women participated in the study. Their mean physical characteristics were as follows: age 24.8 (s(x) = 0.9) years, body mass index 22.9 (s(x) = 0.6) kg x m(-2), maximal oxygen uptake (VO(2max)) 57.7 (s(x) = 2.2) ml x kg(-1) x min(-1). The participants completed two 3-h trials (exercise and control) on separate days in a randomized balanced design after overnight fasts. The exercise trial involved a 1-h treadmill run at 73.5% of VO(2max) followed by 2 h of rest. The control trial consisted of 3 h of rest. Blood samples were collected at 0, 0.5, 1, 1.5, 2, and 3 h. Total ghrelin concentrations were determined from plasma. Hunger was assessed following blood sampling using a 15-point scale. The data were analysed using repeated-measures analysis of variance. Hunger scores were lower in the exercise trial than in the control trial (trial, P = 0.009; time, P < 0.001; trial x time, P < 0.001). Plasma total ghrelin concentrations did not differ between trials. These findings indicate that treadmill running suppresses hunger but this effect is not mediated by changes in plasma total ghrelin concentration.

Exercise and postprandial lipemia: effect of continuous compared with intermittent activity patterns.

Miyashita Masashi;Burns Stephen F;Stensel David J

The American journal of clinical nutrition 83(1) 2006-2006

PubMed

Detail

ISSN:0002-9165

Outline:BACKGROUND:Guidelines state that accumulated physical activity is beneficial for health, but a minimum duration of 10 min per activity bout is recommended. Limited information regarding the effects of short (< 10 min) bouts of activity on health is available, and no studies of the effects of such short bouts of activity on postprandial lipemia have been conducted.;OBJECTIVE:The objective was to compare the effects of accumulating ten 3-min bouts of exercise with those of one 30-min bout of exercise on postprandial plasma triacylglycerol concentrations.;DESIGN:Ten men aged 21-32 y completed three 2-d trials > or = 1 wk apart in a randomized repeated-measures design. On day 1, the subjects rested (no exercise) or ran at 70% of maximum oxygen uptake in either ten 3-min bouts (30 min rest between each) or one continuous 30-min bout. On day 2, the subjects rested and consumed test meals (0.69 g fat, 0.95 g carbohydrate, 0.31 g protein, and 46 kJ/kg body mass) for breakfast and lunch. Venous blood samples were obtained in the fasted state and for 7 h postprandially on day 2.;RESULTS:Postprandial plasma triacylglycerol concentrations were lower throughout day 2 of both the accumulation exercise trial and the continuous exercise trial than during the control trial (main effect of trial: P < 0.001, 2-factor analysis of variance).;CONCLUSIONS:Accumulating multiple short bouts of exercise throughout the day effectively reduce postprandial plasma triacylglycerol concentrations to an extent similar to that of a single 30-min session of exercise in healthy young men.

Increased postprandial triacylglycerol concentrations following resistance exercise.

Burns Stephen F;Broom David R;Miyashita Masashi;Ueda Chihoko;Stensel David J

Medicine and science in sports and exercise 38(3) 2006-2006

PubMed

Detail

ISSN:0195-9131

Outline:PURPOSE:There is conflicting evidence whether a single bout of resistance exercise performed the day before a test meal can lower postprandial triacylglycerol (TAG) concentrations. The present study examined the effect of a single session of resistance exercise, performed the same day as a test meal, on postprandial TAG concentrations in resistance-trained males.;METHODS:Ten healthy males aged 25 (SD 2.6) yr performed two trials at least 1 wk apart in a counterbalanced, randomized design. In each trial, participants consumed a test meal (0.89 g of fat, 1.23 g of carbohydrate, 0.4 g of protein, 60 kJ.kg body mass). Before one meal, participants performed a 90-min bout of resistance exercise. Before the other meal, participants were inactive (control trial). Resistance exercise was performed using free weights and included three sets of 12 repetitions of each of 10 exercises. Sets were performed at 80% of 12-repetition maximum with a 3-min work and rest interval. Venous blood samples were obtained in the fasted state and for 5 h postprandially.;RESULTS:Total area under the plasma TAG concentration versus time curve was higher (Student's t-test P = 0.008) on the exercise than control trial (mean +/- SE: 11.76 +/- 1.64 vs 7.94 +/- 1.08 mmol x L(-1) x 5 h(-1), respectively). Total area under the plasma myoglobin concentration versus time curve was higher (Student's t-test P = 0.010) on the exercise than control trial (16.68 +/- 3.34 vs 6.80 +/- 0.64 nmol x L(-1) x 5 h(-1); respectively).;CONCLUSION:A single bout of resistance exercise can cause a transient elevation in postprandial TAG concentrations. The elevations in plasma myoglobin suggest postexercise muscle damage. Further investigation is needed to see if these findings are linked.

Appetite after rope skipping may differ between males and females.

Kawano Hiroshi;Motegi Fumiya;Ando Takafumi;Gando Yuko;Mineta Mayuko;Numao Shigeharu;Miyashita Masashi;Sakamoto Shizuo;Higuchi Mitsuru

Obesity research & clinical practice 6(2)

PubMedDOI

Detail

ISSN:1871-403X

Outline:SUMMARY:;BACKGROUND:When previously sedentary males and females follow the same exercise training programs with ad libitum feeding, males reduced body mass, but females do not, which suggests that females may increase appetite in response to exercise training compared with males. Rope skipping is traditional exercise modality that everyone had experienced during elementary school years in Japan. The purpose of this study was to determine whether there is a sex difference on appetite after acute rope skipping exercise.;METHODS AND RESULTS:Thirteen healthy young males (22.5 ± 0.8 years, 172.2 ± 1.7 cm, 68.8 ± 2.3 kg, 18.4 ± 0.9%) and 13 females (22.9 ± 0.8 years, 160.6 ± 1.5 cm, 52.9 ± 1.6 kg, 25.0 ± 1.0%) participated in this study. Subjects consumed their lunch by 13:00, and performed a total of 20 min rope skipping exercise (2 sets × 10 min with 5 min interval) from 16:00. In females, appetite significantly increased from immediately after the exercise to 30 min after the exercise (from 13 mm to 30 mm), but remained unchanged in males. Although heart rate, ratings of perceived exertion, and lactate concentrations increased from baseline to immediately after exercise, there were no differences in the increase between males and females. Blood glucose concentrations at baseline and 30 min after exercise were higher in females than in males.;CONCLUSION:These results indicated that rope skipping exercise induces an increase in appetite in females, but not in males. This increased appetite in females after the rope skipping exercise was induced without change in blood glucose concentrations.

Effect of weight loss on maximal fat oxidation rate in obese men.

Tsujimoto Takehiko;Sasai Hiroyuki;Miyashita Masashi;Eto Miki;So Rina;Ohkubo Hiroyuki;Tanaka Kiyoji

Obesity research & clinical practice 6(2)

PubMedDOI

Detail

ISSN:1871-403X

Outline:SUMMARY:;INTRODUCTION:The hallmark features of obesity include insulin resistance and an impaired ability to oxidize lipids. As compared to exercise training, it remains relatively unclear if diet-induced weight loss can also induce fat metabolism. This study was undertaken to examine the effects of diet-induced weight loss on fat metabolism during a single session of exercise in middle-aged obese men.;METHODS:Fifteen obese men who were otherwise healthy (average age of 53.5 ± 6.9 yr and average body mass index of 27.8 ± 1.6 kg/m(2)) participated in a 12-wk weight loss program primarily consisting of dietary modification. Maximal fat oxidation (MFO) rates, MFO per lean body mass (MFOLBM) and insulin resistance (HOMA-IR) were measured before and after the program. Participants performed a 24-min graded exercise test on a cycle ergometer, with 15-W increments every 4 min. Expired gas analysis was performed by indirect calorimetry, and nonprotein respiratory quotient equations were used to calculate fat oxidation rates.;RESULTS:The weight (-8.3 ± 3.8 kg), fat mass (-4.5 ± 1.9 kg), and lean body mass (-3.8 ± 2.4 kg) (P < 0.001 for all measurements) of the participants were decreased at the end of the 12-wk program. The MFO tended to increase by 19% (P = 0.08) and MFOLBM significantly increased by 28.8% (P = 0.02). Although insulin resistance also significantly decreased by 49% (P < 0.001), changes in fat oxidation variables did not correlate with changes in insulin resistance.;CONCLUSION:Diet-induced weight loss improves fat metabolism with the improvement in insulin resistance.:

The effect of daily intake of tea catechin-rich beverage and acute intake of jelly drink containing alanine and proline on endurance performance

Yanaoka T, Furuhata Y, Koizumi T, Inoue N, Mihara R, Oota N, Minegishi Y, Ootsuka A, Shimotoyodome A, Kidokoro T, Kashiwabara K, Yamagami J, Miyashita M

Japanese Journal of Sports Nutrition Peer Review Yes 12p.21 - 322019/01-2019/01

Effect of two weeks of tea catechin-rich beverage intake on 3000 m time-trial performance

Yamagami J, Miyashita M, Kidokoro T, Yanaoka T, Kashiwabara K, Wakisaka T, Matsui Y, Takeshita M, Osaki N, Katsuragi Y

Japanese Journal of Sports Nutrition Peer Review Yes 11p.25 - 322018/01-2018/01

Effect of two weeks of tea catechin-rich beverage intake on whole body endurance measured during an intermittent exercise test: A randomised double blind, placebo-controlled trial

Yamagami J, Miyashita M, Hasegawa M, Kidokoro T, Yanaoka T, Kashiwabara K, Wakisaka T, Matsui Y, Yoshimura K, Takeshita M, Yasunaga K

Japanese Journal of Sports Nutrition Peer Review Yes 10p.17 - 252017/01-2017/01

Effects of increased daily physical activity on mental health and depression biomarkers in postmenopausal women

Takahashi M, Lim PL, Tsubosaka M, Kim H-Y, Miyashita M, Suzuki K, Tan EL, Shibata S.

Journal of Physical Therapy Science Peer Review Yes 31p.408 - 4132019/04-2019/04

The effects of water temperature on gastric motility and energy intake in healthy young men

Fujihira K, Hamada Y, Yanaoka T, Yamamoto R, Suzuki K, Miyashita M.

European Journal of Nutrition Peer Review Yes 2019/01-2019/01

Gum chewing while walking increases fat oxidation and energy expenditure

Kanno S, Shimo K, Ando T, Hamada Y, Miyashita M, Osawa, K.

Journal of Physical Therapy Science Peer Review Yes 31p.435 - 4392019/04-2019/04

Acute and chronic effects of exercise on appetite, energy intake and appetite-related hormones: the modulating effect of adiposity, sex and habitual physical activity

Dorling JL, Broom DR, Burns SF, Clayton DJ, Deighton K, James LJ, King JA, Miyashita M, Thackray AE, Batterham RL, Stensel DJ.

Nutrients Peer Review Yes 10p.11402018-2018

Very-short-duration, low-intensity half-time re-warm up increases subsequent intermittent sprint performance

Yanaoka T, Hamada Y, Kashiwabara K, Kurata K, Yamamoto R, Miyashita M, Hirose N.

Journal of Strength and Conditioning Research Peer Review Yes 32p.3258 - 32662018-2018

The effect of half-time re-warm up duration on intermittent sprint performance

Yanaoka T, Kashiwabara K, Masuda Y, Yamagami J, Kurata K, Takagi S, Miyashita M, Hirose N.

Journal of Sports Science and Medicine Peer Review Yes 17(269) p.2782018-2018

Halftime re-warm up with intermittent exercise improves the subsequent exercise performance of soccer referees

Yanaoka T, Yamagami J, Kashiwabara K, Kidokoro T, Miyashita M.

Journal of Strength and Conditioning Research Peer Review Yes 32(221) p.2162018-2018

Effect of different methods of active recovery after high-intensity exercise on intermittent exercise performance of soccer referees

Yanaoka T, Kidokoro T, Edamoto K, Kashiwabara K , Yamagami J, Miyashita M.

The Journal of Physical Fitness and Sports Medicine. Peer Review Yes 6(335) p.3422017-2017

Lecture And Oral

Physical activity for older adults – Implication for postprandial triacylglycerol metabolism (Invited talk)

Masashi Miyashita

2018 The Society of Chinese Scholars on Exercise Physiology and Fitness & 2018 The Society of Taiwan Scholars on Exercise Physiology and FitnessInvitation Yes2018/08

Detail

International conferenceOral presentation(keynote)Venue:Taichung

Effect of tea catechin-rich beverage intake on exercise performance (Invited talk)

Masashi Miyashita

The 8th International Conference on Sports and Exercise Science(Chulalongkorn University)Invitation Yes2018/06

Detail

International conferenceSymposium workshop panel(nominated)Venue:Bangkok

Impact of physical activity and physical inactivity on postprandial metabolism in older adults (Invited talk)

Masashi Miyashita

2018 Food, Exercise and Technology for Health Promotion(Waseda University)Invitation Yes2018/01

Detail

Symposium workshop panel(nominated)Venue:Singapore

Physical activity and postprandial lipid metabolism; implications for everyday life (Invited talk)

Masashi Miyashita

14th National Kasetsart University Kamphaeng Sean Conference(Kasetsart University)Invitation Yes2017/12

Detail

Oral presentation(keynote)Venue:Kamphaeng Sean

The role of daily physical activity on lipid metabolism (Invited talk)

Masashi Miyashita

The 17th Scientific Meeting of the Japanese Society of Anti-Aging Medicine(Japanese Society of Anti-Aging Medicine)Invitation Yes2017/06

Detail

National conferenceSymposium workshop panel(nominated)Venue:Tokyo

Physical activity and physical inactivity (Invited talk)

Masashi Miyashita

2017 Annual Meeting of The Japan Society for Bioscience, Biotechnology, and Agrochemistry(Japan Society for Bioscience, Biotechnology, and Agrochemistry)Invitation Yes2017/03

Detail

National conferenceOral presentation(invited, special)Venue:Kyoto

The role of increased physical activity in the prevention of atherosclerosis in older adults (Invited talk)

Masashi Miyashita

Japan Women’s College of Physical Education, Research Institute of Physical Fitness, The 27th Research Forum(Japan Women’s College of Physical Education, Research Institute of Physical Fitness)2016/12/03

Detail

Venue:Tokyo, Japan

The role of physical activity for preventing chronic diseases: from fasting to postprandial lipid and carbohydrate metabolism (Invited talk)

Masashi Miyashita

The 34th Congress of the Tohoku Physical Therapy(Akita Physical Therapy Association)2016/11/12

Detail

Venue:Akita, Japan

Exercise therapy for improving lipid metabolism (Invited talk)

Masashi Miyashita

The 35th Annual Meeting of The Japanese Association of Exercise Therapy and Prevention(The Japanese Association of Exercise Therapy and Prevention)2016/09/03

Detail

Venue:Kanagawa, Japan

The role of interrupting sitting time with regular exercise on postprandial metabolism (Invited talk)

Masashi Miyashita

The 48th Annual Scientific Meeting of the Japan Atherosclerosis Society(Japan Atherosclerosis Society)2016/07/15

Detail

Venue:Tokyo, Japan

Interrupting prolonged sitting time with short walks attenuates postprandial lipaemia in postmenopausal women (Invited talk)

Masashi Miyashita

2015 Winter International Conference and Workshop for Korean Society of Exercise Physiology(Korean Society of Exercise Physiology)2015/12/05

Detail

Venue:Korea

Acute and chronic effects of increased physical activity on postprandial triglyceride metabolism in postmenopausal women (Invited talk)

Masashi Miyashita

28th International University Sports Federation and 88 Seoul Olympic Commemoration Conferences(International University Sports Federation)2015/07/12

Detail

Venue:Korea

Physical activity and postprandial lipaemia: Studies from exercise and activities of daily living (Invited talk)

Masashi Miyashita

18th Japan Society of Metabolism and Clinical Nutrition Annual Conference(Japan Society of Metabolism and Clinical Nutrition)2015/01/11

Detail

Venue:Kyoto, Japan

Acute effect of increased participation in activities of daily living on postprandial lipaemia in postmenopausal women (Invited talk)

Masashi Miyashita

The 68th European College of Sport Science Annual Congress(European College of Sport Science)2013/06/26

Detail

Venue:Spain

Thirty minutes of aerobic exercise reduces postprandial capillary triacylglycerol concentrations in centrally obese middle-aged men (Invited talk)

Masashi Miyashita

The 16th European College of Sport Science Annual Congress (European College of Sport Science Annual)2013/06/23

Detail

Venue:Turkey

Physiological benefits of low volume of physical activity in older adults (Invited talk)

Masashi Miyashita

2013 International Symposium on Physical Activity and Exercise Science(National Chung Hsing University)2013/05/19

Detail

Venue:Taiwan

Exercise and activities of daily living for the prevention of hyperlipaedemia (Invited talk)

Masashi Miyashita

The 25th the Running Society (Society for Running)2013/03/24

Detail

Venue:Tokyo, Japan

The methods to increase daily physical activity for the prevention of atherosclerosis (Invited talk)

Masashi Miyashita

The 156th regional meeting of the Japanese Society of Sports Medicine and Physical Fitness(Japanese Society of Sports Medicine and Physical Fitness held )2012/12/08

Detail

Venue:Tokyo, Japan

The role of physical activity in the prevention of hyperlipaedemia (Invited talk)

Masashi Miyashita

the Atherosclerosis Update 2012 Symposium(Japan Atherosclerosis Society)2012/09/01

Detail

Venue:Tokyo, Japan

The role of physical activity in the prevention of atherosclerotic cardiovascular disease in older adults (Invited talk)

Masashi Miyashita

2011 International Conference of Korean Society of Exercise Physiology(Korean Society of Exercise Physiology)2011/11/12

Detail

Venue:Korea

Exercise in the prevention of cardiovascular disease: the health benefits of accumulating exercise (Invited talk)

Masashi Miyashita

The 2011 International Conference of Exercise for 3Qs - Health Quotient, Emotion Quotient and Intelligence Quotient(National Taiwan Sport University)2011/10/05

Detail

Venue:Taiwan

Effectiveness of high-intensity and low-intensity exercise (Invited talk)

Masashi Miyashita

The 12th Japan Society of Health Promotion Annual Conference(Japan Society of Health Promotion)2011/02/18

Detail

Venue:Fukuoka, Japan

Physical activity and health promotion: Research directions and methods (Invited talk)

Masashi Miyashita

2011 The International Council for Health, Physical Education, Recreation, Sport, and Dance (ICHPER‧SD) Asia Congress(The International Council for Health, Physical Education, Recreation, Sport, and Dance)2011/01/13

Detail

Venue:Taiwan

Physical activity and postprandial lipaemia: Implications for active living (Invited talk)

Masashi Miyashita

10th Anniversary International Symposium on Human and Sports Science(Keimyung University)2010/12/16

Detail

Venue:Korea

Aerobic exercise and non-fasting triacylglycerol: translating theory into practice (Invited talk)

Masashi Miyashita

61st Conference of Japan Society of Physical Education, Health and Sport Sciences(Japan Society of Physical Education, Health and Sport Sciences)2010/09/08

Detail

Venue:Aichi, Japan

Aerobic exercise and non-fasting triacylglycerol: translating theory into practice (Invited talk)

Masashi Miyashita

Dong-A University Seminar(Dong-A University)2010/08/14

Detail

Venue:Korea

Metabolic syndrome and lipoprotein lipase: exercise and diet (Invited talk)

Masashi Miyashita

The 10th Lipoprotein Lipase Interest Group Meeting(Lipoprotein Lipase Interest Group )2010/04/23

Detail

Venue:Tokyo, Japan

Health benefits of preprandial-exercise and postprandial exercise (Invited talk)

Masashi Miyashita

The 20th Japanese Society of Clinical Sports Medicine Annual Conference(Japanese Society of Clinical Sports Medicine)2009/11/15

Detail

Venue:Hyougo, Japan

Effect of exercise therapy on lipids profile in obese men (Invited talk)

Masashi Miyashita

Fukuoka University Seminar(Fukuoka University)2009/09/15

Detail

Venue:Fukuoka, Japan

Aerobic exercise and lipid metabolism (Invited talk)

Masashi Miyashita

The 17th Japanese Society of Exercise Physiology Annual Conference(Japanese Society of Exercise Physiology)2009/07/25

Detail

Venue:Tokyo, Japan

Accumulating short bouts of exercise and postprandial lipaemia (Invited talk)

Masashi Miyashita

The 10th Japan Society of Health Promotion Annual (Japan Society of Health Promotion)2009/02/20

Detail

Venue:Fukuoka, Japan

Exercise and Appetite

Masashi Miyashita

The 6th Annual Congress of Japan Sports Nutrition Association(Japan Sports Nutrition Association)Invitation Yes2019/08

Detail

National conferenceOral presentation(invited, special)Venue:Tokyo

Exercise Gluidelines: A guideline form Japan Atherosclerosis Society

Masashi Miyashita

The 74th Japanese Society of Physical Fitness and Sports Medicine conference(Japanese Society of Physical Fitness and Sports Medicine)2019/09

Detail

National conferenceSymposium workshop panel(public)Venue:Ibaraki

Research Grants & Projects

Grant-in-aids for Scientific Research Adoption Situation

Research Classification:

Effectiveness of accumulating physical activity on postprandial metabolism in postmenopausal women.

2017/-0-2020/-0

Allocation Class:¥4550000

Research Classification:

The role of physical activity in the prevention of postprandial lipaemia in older adults: translating theory into practice

2012/-0-2015/-0

Allocation Class:¥4550000

Research Classification:

Availability of rope skipping exercise for decrease in appetite

2011/-0-2013/-0

Allocation Class:¥3770000

Research Classification:

Acute aerobic exercise ad postprndail triacylglycerol : Evaluation by a bench-top analyser

Allocation Class:¥2730000

On-campus Research System

Special Research Project

胃の拡張がグレリンの分泌動態に及ぼす影響

2016

Research Results Outline:若年男性を対象に、異なる量の2つの飲料(①低質量試行②高質量試行)摂取後の消化管の動態を調べるために超音波診断装置を用いて胃幽門部断面積の計測をおこな若年男性を対象に、異なる量の2つの飲料(①低質量試行②高質量試行)摂取後の消化管の動態を調べるために超音波診断装置を用いて胃幽門部断面積の計測をおこなった。その結果、胃幽門部断面積は高質量試行において低質量試行と比較して有意に高い値を示した。また、...若年男性を対象に、異なる量の2つの飲料(①低質量試行②高質量試行)摂取後の消化管の動態を調べるために超音波診断装置を用いて胃幽門部断面積の計測をおこなった。その結果、胃幽門部断面積は高質量試行において低質量試行と比較して有意に高い値を示した。また、主観的な満腹感は高質量試行において上昇し、甘味・塩味への欲求は減少したものの、自由摂取の食事量調査におけるエネルギー摂取量は高質量試行において有意に高い値を示した。2時間中の胃収縮回数は高質量試行にて有意に高い値を示した。血糖、中性脂肪、遊離脂肪酸においては試行間に差は見られなかった。本研究より高質量の飲水後は、低質量の飲水後と比較して胃幽門部断面積が増加し、一時的に主観的な食欲が低下することが明らかとなった。しかし、高質量の飲水後は胃収縮回数が増加し、飲水2時間後のエネルギー摂取量の増加に繋がる可能性が示唆された。

閉経後脂質異常症・2型糖尿病女性に対する断続性身体活動による食後代謝改善の有用性

2016Collaborator:鈴木克彦

Research Results Outline:Purpose: Although a single bout of continuous exercise (≥30 min) reduces poPurpose: Although a single bout of continuous exercise (≥30 min) reduces postprandial triglyceride (TG), little evidence is ...Purpose: Although a single bout of continuous exercise (≥30 min) reduces postprandial triglyceride (TG), little evidence is available regarding the effect of short (≤10 min) bouts of exercise on postprandial TG in at-risk individuals. This study compared the effect of different patterns of walking on postprandial TG in older women with hypertriglyceridemia. Methods: Twelve older women (aged 71 ± 5 yrs, mean ± S.D.) with hypertriglyceridemia (fasting TG ≥ 1.70 mmol/L) completed three, one-day trials in a random order: 1) control, 2) continuous walking, and 3) short bouts of walking. On the control trial, participants rested for 8 hours. For the walking trials, participants walked briskly in either one 30-min bout in the morning (0900-0930) or twenty 90-sec bouts over 8 hours. Venous blood samples were collected in the fasted state and at 2, 4, 6 and 8 h after breakfast. Results: The serum TG incremental area under the curve was 35% and 33% lower on the continuous and short bouts of walking trials than the control trial (8.2 ± 3.1 vs 8.5 ± 5.4 vs 12.7 ± 5.8 mmol∙8h/L respectively, P = 0.001). Conclusions: Accumulating walking in short bouts limits postprandial TG in at-risk, older women with fasting hypertriglyceridemia.

Foreign Researcher Acceptance Situation

2017/10-2017/10

Acceptance Person Affiliation Original Institution:Loughborough University, School of Sport, Exercise and Health Sciences(England)

2017/10-2017/10

Acceptance Person Affiliation Original Institution:Clermont Auvergne University, Laboratory of Metabolic Adaptations to Exercise under Physiological and Pathological Conditions(France)

2015/04-2015/04

Acceptance Person Affiliation Original Institution:Dong-A University, The Dong-A Anti-aging Research Institute(Korea)

2013/07-2014/07

Acceptance Person Affiliation Original Institution:Dong-A University, College of Sport Sciences (Korea)

2011/08-2011/08

Acceptance Person Affiliation Original Institution:California Polytechnic State University, Kinesiology Department (USA)

2011/08-2011/08

Acceptance Person Affiliation Original Institution:Queensland University of Technology, School of Human Movement Studies, Institute of Health and Biomedical Innovation(Australia)

2011/07-2011/08

Acceptance Person Affiliation Original Institution:Loughborough University, School of Sport, Exercise and Health Sciences(England)

2011/02-2011/02

Acceptance Person Affiliation Original Institution:Nanyang Technological University, National Institute of Education(Singapore)

2011/02-2011/02

Acceptance Person Affiliation Original Institution:Loughborough University, School of Sport, Exercise and Health Sciences(England)

2010/09-2010/09

Acceptance Person Affiliation Original Institution:Loughborough University, School of Sport, Exercise and Health Sciences(England)

2009/09-2009/09

Acceptance Person Affiliation Original Institution:Loughborough University, School of Sport, Exercise and Health Sciences(England)

Lecture Course

Course TitleSchoolYearTerm
Seminar I (Physiology of Exercise and Health)School of Sport Sciences2019fall semester
Seminar II (Physiology of Exercise and Health)School of Sport Sciences2019spring semester
Seminar III (Physiology of Exercise and Health)School of Sport Sciences2019fall semester
Seminar IV (Physiology of Exercise and Health)School of Sport Sciences2019spring semester
Sport and Health 01School of Sport Sciences2019fall semester
Sport and Health 02School of Sport Sciences2019spring semester
Basic Seminar of Health PromotionSchool of Sport Sciences2019spring semester
Exercise Metabolism (Directed Research M) AGraduate School of Sport Sciences2019spring semester
Exercise Metabolism (Directed Research M) BGraduate School of Sport Sciences2019fall semester
Health and Exercise Science 1 (Directed Research M) (Miyashita) AGraduate School of Sport Sciences2019fall semester
Health and Exercise Science 1 (Directed Research M) (Miyashita) BGraduate School of Sport Sciences2019spring semester
Exercise Metabolism (Seminar 1) AGraduate School of Sport Sciences2019spring semester
Exercise Metabolism (Seminar 1) BGraduate School of Sport Sciences2019fall semester
Health and exercise science 1 (Seminar 1) AGraduate School of Sport Sciences2019spring quarter
Health and exercise science 1 (Seminar 1) BGraduate School of Sport Sciences2019summer quarter
Health and exercise science 1 (Seminar 2) AGraduate School of Sport Sciences2019fall quarter
Health and exercise science 1 (Seminar 2) BGraduate School of Sport Sciences2019winter quarter
Exercise Metabolism (Seminar 2) AGraduate School of Sport Sciences2019spring semester
Exercise Metabolism (Seminar 2) BGraduate School of Sport Sciences2019fall semester
Introduction to Skeketal Muscle PhysiologyGraduate School of Sport Sciences2019summer quarter
Physical Activity and Health PhysiologyGraduate School of Sport Sciences2019winter quarter
Exercise Metabolism (Directed Research D) AGraduate School of Sport Sciences2019spring semester
Exercise Metabolism (Directed Research D) BGraduate School of Sport Sciences2019fall semester

Visiting - Interlocking-time or Part-time Lecturers of Other Institutions, etc.

2013/12Dong-A University(Korea)Visiting Associate Professor

Social Contribution

Green tea and exercise performance

Role:Lecturer2018/04-2018/04

Sponser ・Organizer ・Publisher:Japan Agricultural Cooperatives, Ensyuyumesaki

Place:Shizuoka, Japan

Effect of increased daily activities on the prevention of atherosclerosis

Role:Lecturer2018/01-2018/01

Sponser ・Organizer ・Publisher:Sayama City Senior College in Tokorozawa, Saitama.

Place:Saitama, Japan

Metabolic syndrome prevention; Physical activity and physical inactivity

Role:Lecturer2017/11-2017/11

Sponser ・Organizer ・Publisher:Japan Dietetic Association

Place:Yamagata, Japan

Detail

Type:Seminars, Workshops

Associations among anemia, fatigue, nutritional status and oxidative stress in female athletes

Role:Lecturer2017/10-2017/10

Sponser ・Organizer ・Publisher:The 4th Seminar on Sports and Oxidative Stress/Antioxidant

Place:Tokyo, Japan

Detail

Type:Seminars, Workshops

"Increased physical activity for preventing and managing metabolic syndrome"Lecturer

2016/11-2016/11

Sponser ・Organizer ・Publisher:Japan Dietetic Association

Event ・Program ・ Title:Health Seminar for preventing metabolic syndrome

Place:Nagano, Japan

"The effect of physical activity and antioxidants on oxidative stress"Lecturer

2016/10-2016/10

Sponser ・Organizer ・Publisher:Wismar Corporation

Event ・Program ・ Title:The 3rd Seminar on Sports and Oxidative Stress/Antioxidant

Place:Tokyo, Japan

"Physical activity levels in children"Lecturer

2016/08-2016/08

Sponser ・Organizer ・Publisher:Nagano Prefecture Saku City

Event ・Program ・ Title:School Health Committee Seminar

Place:Nagano, Japan

"Effects of interrupting sitting time with regular exercise on postprandial lipaemia: from exercise to daily activity interventions" Lecturer

2016/01-2016/01

Sponser ・Organizer ・Publisher:Lotte Corporation

Event ・Program ・ Title:Seminar

Place:Saitama, Japan

"Health and Fitness in children and adolescents" Lecturer

2015/11-2015/11

Sponser ・Organizer ・Publisher:Higashi Junior High School in Saku, Nagano

Event ・Program ・ Title:Seminar

Place:Nagano, Japan

"The effect of lifestyle activity on oxidative stress" Lecturer

2015/11-2015/11

Sponser ・Organizer ・Publisher:Wismar Corporation

Event ・Program ・ Title:The 2nd Seminar on Sports and Oxidative Stress/Antioxidant

Place:Tokyo, Japan

"Basic sports coaching" Lecurer

2015/05-2015/05

Sponser ・Organizer ・Publisher:Japan Ground Golf Association

Event ・Program ・ Title:2015 Renewing Coaching License Course

Place:Hyogo, Japan

Research Committee member

2014/12-2015/03

Sponser ・Organizer ・Publisher:Japan Ground Golf Association

Place:Tokyo, Japan

"Promoting child health in schools" Lecturer

2014/09-2014/09

Sponser ・Organizer ・Publisher:City government in Saku, Nagano

Event ・Program ・ Title:Seminar

Place:Nagano, Japan

"Evidence based for health education and practice" Lecturer

2014/08-2014/08

Sponser ・Organizer ・Publisher:Ministory of Education, Culture, Sports Science and Technology

Event ・Program ・ Title:2014 Renewing Teaching License Course

Place:Tokyo, Japan

"Be active through a daily life" Lecturer

2014/07-2014/07

Sponser ・Organizer ・Publisher:Japan Atherosclerosis Society

Event ・Program ・ Title:Public Seminar

Place:Tokyo, Japan

"Exercise and daily activities for health" Lecurer

2014/05-2014/05

Sponser ・Organizer ・Publisher:Physical Education Group, Tokyo Gakugei University Affiliated Schools

Event ・Program ・ Title:Seminar

Place:Tokyo, Japan

"Health promotion and its practice through physical activity" Lecurer

2013/08-2013/08

Sponser ・Organizer ・Publisher:Kao Corporation

Event ・Program ・ Title:Seminar

Place:Tokyo, Japan

"Exercise nutrition for athletes" Lecturer

2013/08-2013/08

Sponser ・Organizer ・Publisher:Japan Professional Bowling Association

Event ・Program ・ Title:2013 Coaching License Course

Place:Tokyo, Japan

"Evidence based for health education and practice" Lecturer

2013/08-2013/08

Sponser ・Organizer ・Publisher:Ministory of Education, Culture, Sports Science and Technology

Event ・Program ・ Title:2013 Renewing Teaching License Course

Place:Tokyo, Japan

"Preprandial exercise and its health benefit" Lecurer

2009/10-2009/10

Sponser ・Organizer ・Publisher:Ibaraki Prefectural Health Plaza

Event ・Program ・ Title:2009 Health Promotion Programme (2nd course)

Place:Ibaraki, Japan

"Postprandial exercise and its health benefit" Lecturer

2009/09-2009/09

Sponser ・Organizer ・Publisher:Ibaraki Prefectural Health Plaza

Event ・Program ・ Title:2009 Health Promotion Programme (2nd course)

Place:Ibaraki, Japan

"Preprandial exercise and its health benefit" Lecurer

2009/08-2009/08

Sponser ・Organizer ・Publisher:Ibaraki Prefectural Health Plaza

Event ・Program ・ Title:2009 Health Promotion Programme (1st course)

Place:Ibaraki, Japan

"Postprandial exercise and its health benefit" Lecturer

2009/07-2009/07

Sponser ・Organizer ・Publisher:Ibaraki Prefectural Health Plaza

Event ・Program ・ Title:2009 Health Promotion Programme (1st course)

Place:Ibaraki, Japan