Effect of exercise performed before or after breakfast on 24h fat oxidation. Metabolism.
Effect of exercise performed before or after breakfast on 24h fat oxidation. Metabolism.
复制标题
早餐前或早餐后进行的运动对 24 小时脂肪氧化的影响。
DOI：
10.1016/j.metabol.2012.12.008
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发表时间：
2013
期刊：
影响因子：
9.8
通讯作者：
Shimada K
中科院分区：
文献类型：
--
作者：
星秋夫;中井誠一;金田英子;山本享;稲葉裕;Shimada K
OBJECTIVEFat oxidation during exercise depends on nutritional state, and exercise performed in the post-absorptive state oxidizes more fat than that performed in the postprandial state. However, the effects of exercise on energy metabolism continue during the post-exercise period, and the difference in fat oxidation during exercise may be compensated for during the post-exercise period. The present study compared the effects of an acute exercise bout in the post-absorptive or postprandial state on 24h fat oxidation.METHODSTwelve young male athletes stayed twice in a room-size metabolic chamber for 24h indirect calorimetry in a randomized repeated-measure design. Before or after breakfast, i.e. in the post-absorptive or postprandial state, subjects exercised at 50% VO2max for 60min.RESULTSDuring the 60min of exercise, energy expenditure in the two exercise trials were equivalent, but exercise in the post-absorptive state was performed with lower RQ compared with that in the postprandial state (P<0.01). The time of exercise relative to breakfast did not affect 24h energy expenditure (P>0.5). However, accumulated 24h fat oxidation was higher (P<0.05) and that of carbohydrate oxidation was lower (P<0.05) when exercise was performed in the post-absorptive state.CONCLUSIONSCompared with exercise performed in the postprandial state, exercise performed in the post-absorptive state oxidized more fat and saved more carbohydrate in the body, without affecting 24h energy expenditure.
