Bahr R, Ingnes I, Vaage O, Sejersted O M, Newsholme E A
J Appl Physiol (1985). 1987 Feb;62(2):485-90. doi: 10.1152/jappl.1987.62.2.485.
This study was undertaken to determine the effect of exercise duration on the time course and magnitude of excess postexercise O2 consumption (EPOC). Six healthy male subjects exercised on separate days for 80, 40, and 20 min at 70% of maximal O2 consumption on a cycle ergometer. A control experiment without exercise was performed. O2 uptake, respiratory exchange ratio (R), and rectal temperature were monitored while the subjects rested in bed 24 h postexercise. An increase in O2 uptake lasting 12 h was observed for all exercise durations, but no increase was seen after 24 h. The magnitude of 12-h EPOC was proportional to exercise duration and equaled 14.4 +/- 1.2, 6.8 +/- 1.7, and 5.1 +/- 1.2% after 80, 40, and 20 min of exercise, respectively. On the average, 12-h EPOC equaled 15.2 +/- 2.0% of total exercise O2 consumption (EOC). There was no difference in EPOC:EOC for different exercise durations. A linear decrease with exercise duration was observed in R between 2 and 24 h postexercise. No change was observed in recovery rectal temperature. It is concluded that EPOC increases linearly with exercise duration at a work intensity of 70% of maximal O2 consumption.
本研究旨在确定运动持续时间对运动后过量耗氧量（EPOC）的时间进程和幅度的影响。六名健康男性受试者在不同日期，于自行车测力计上以最大耗氧量的70%进行80、40和20分钟的运动。进行了一次无运动的对照实验。在运动后24小时受试者卧床休息期间，监测耗氧量、呼吸交换率（R）和直肠温度。所有运动持续时间均观察到耗氧量增加持续12小时，但24小时后未见增加。12小时EPOC的幅度与运动持续时间成正比，运动80、40和20分钟后分别等于14.4±1.2%、6.8±1.7%和5.1±1.2%。平均而言，12小时EPOC等于总运动耗氧量（EOC）的15.2±2.0%。不同运动持续时间的EPOC:EOC无差异。运动后2至24小时观察到R随运动持续时间呈线性下降。恢复直肠温度未见变化。得出结论：在最大耗氧量的70%的工作强度下，EPOC随运动持续时间呈线性增加。
