Effects of Caffeine on Multiple Bouts of Short Duration Exercise Metabolism

• Main Authors: Xiang-Yi Dong, 董向儀
• Other Authors: Shen-Yu Hsieh
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/15688661157162984624

碩士 === 國立臺灣師範大學 === 運動科學研究所 === 101 === It is apparent from the literature that multiple bouts of short duration exercise consume more energy than a bout of long duration exercise. Nevertheless, whether caffeine will enhance energy expenditure on multiple bouts of short duration exercise is not known. Purpose: To investigate the metabolism of multiple bouts of short duration exercise with caffeine supplement. Methods: With a double-blind and repeated measure design, 12 healthy male university students took placebo or caffeine (5mg/kg) in a counter-balanced order. Subjects performed 3 bouts of short duration exercise (10 min for each bout, with a rest interval of 20 min between each bout ) at 80% VO2max. Oxygen consumption, energy expenditure, and respiratory exchange ratio (RER) were measured during exercise and though recovery to the resting level. A repeated measures two way ANOVA was used to determine differences for each trial. The significance level was α = .05 . Results: In total oxygen consumption, the caffeine trial (114.0 ±16.4 L) was significantly higher than placebo trial (104.4 ±14.3 L) (p < .05). In total energy expenditure, caffeine trial was also significantly higher than placebo trial ( 565.7 ± 83.0 kcal versus 520.6 ± 73.2 kcal )(p < .05). Although RER was not significantly between two trials, but the fat metabolism of caffeine trial was significantly higher than placebe trial. Conclusion: Caffeine can enhance energy expenditure of multiple bouts of short duration exercise. Thus, caffeine plus multiple bouts of exercise is a good combination for weight control.