Enhancement of fat metabolism by repeated bouts of moderate endurance exercise
Enhancement of fat metabolism by repeated bouts of moderate endurance exercise
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DOI：
10.1152/japplphysiol.01302.2006
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发表时间：
2007-06-01
影响因子：
3.3
通讯作者：
Takamatsu, Kaoru
中科院分区：
文献类型：
--
作者：
Goto, Kazushige;Ishii, Naokata;Takamatsu, Kaoru
本研究比较“一次长时间运动”与“多次运动”在相同运动强度与运动时间下的脂肪代谢。七名男性进行了三项试验：1）单次60分钟的运动（单次）; 2）两次30分钟的运动，运动之间间隔20分钟的休息（重复）; 3）休息。每次运动都是在最大摄氧量的60%下用自行车测力计进行的。在单次和重复试验中，血清甘油、生长激素、血浆肾上腺素和去甲肾上腺素浓度在第一次30分钟运动中显著升高（P < 0.05）。在重复试验中，血清游离脂肪酸（FFA）、乙酰乙酸和3-羟基丁酸浓度在随后的20分钟休息期内迅速升高（P < 0.05）。在第二次30分钟运动中，重复试验中FFA和肾上腺素反应显著高于单次试验（P < 0.05）。此外，重复试验显示胰岛素和葡萄糖值显著低于单次试验。在运动后60分钟的恢复期内，重复试验组的FFA、甘油和3-羟基丁酸浓度显著高于单一试验组（P < 0.05）。在恢复期，重复试验中脂肪氧化对能量消耗的相对贡献显著高于单次试验（P < 0.05）。这些结果表明，与相同总运动时间的单次长时间运动相比，重复运动会增强脂肪代谢。
This study compared the fat metabolism between "a single bout of prolonged exercise" and "repeated bouts of exercise" of equivalent exercise intensity and total exercise duration. Seven men performed three trials: 1) a single bout of 60-min exercise (Single); 2) two bouts of 30-min exercise, separated by a 20-min rest between exercise bouts (Repeated); and 3) rest. Each exercise was performed with a cycle ergometer at 60% of maximal oxygen uptake. In the Single and Repeated trials, serum glycerol, growth hormone, plasma epinephrine, and norepinephrine concentrations increased significantly (P < 0.05) during the first 30-min exercise bout. In the Repeated trial, serum free fatty acids (FFA), acetoacetate, and 3-hydroxybutyrate concentrations showed rapid increases (P < 0.05) during a subsequent 20-min rest period. During the second 30-min exercise bout, FFA and epinephrine responses were significantly greater in the Repeated trial than in the Single trial (P < 0.05). Moreover, the Repeated trial showed significantly lower values of insulin and glucose than the Single trial. During the 60-min recovery period after the exercise, FFA, glycerol, and 3-hydroxybutyrate concentrations were significantly higher in the Repeated trial than in the Single trial (P < 0.05). The relative contribution of fat oxidation to the energy expenditure showed significantly higher values (P < 0.05) in the Repeated trial than in the Single trial during the recovery period. These results indicate that repeated bouts of exercise cause enhanced fat metabolism compared with a single bout of prolonged exercise of equivalent total exercise duration.