Sedlock D A
Exercise Physiology Laboratory, Department of PEHRS, Purdue University, West Lafayette, IN 47097.
Br J Sports Med. 1991 Mar;25(1):38-40. doi: 10.1136/bjsm.25.1.38.
This study was designed to examine the effect of exercise intensity on the magnitude and duration of excess postexercise oxygen consumption (EPOC) in women. On separate days and in a counterbalanced order, seven moderately active young adult women performed a 850 kJ cycle ergometer exercise at an intensity of 40 or 60% of their previously determined peak oxygen uptake (VO2). Baseline VO2 and heart rate (HR) were recorded during the last 10 min of a 45 min seated rest. VO2 and HR were measured continuously during recovery until VO2 returned to baseline. There was no significant difference noted in the baseline measures between the two exercise programmes. Magnitude of EPOC was comparable (P greater than 0.05) being mean (s.d.) of 30(17) and 36(13) kJ after 40 and 60% exercises respectively. Although the EPOC duration was 53% longer following the 40% exercise than following 60% (27(15) min and 18(8) min, respectively) this difference was not statistically significant. These exercise conditions failed to produce a prolonged EPOC in the women of this study, and values recorded for magnitude of EPOC indicate that it was not significant with regard to the overall energy expenditure of the activity. It was concluded that both magnitude and duration of EPOC seemed to be independent of the chosen exercise intensities used by the women in this study.
本研究旨在探讨运动强度对女性运动后过量氧耗（EPOC）的幅度和持续时间的影响。在不同的日子里，以平衡的顺序，七名中度活跃的年轻成年女性以其先前测定的峰值摄氧量（VO2）的40%或60%的强度进行了850千焦的自行车测力计运动。在45分钟坐位休息的最后10分钟记录基线VO2和心率（HR）。在恢复过程中持续测量VO2和HR，直到VO2恢复到基线水平。两个运动方案的基线测量值之间没有显著差异。EPOC的幅度相当（P大于0.05），40%和60%运动后的平均值（标准差）分别为30（17）千焦和36（13）千焦。虽然40%运动后的EPOC持续时间比60%运动后的长53%（分别为27（15）分钟和18（8）分钟），但这种差异没有统计学意义。这些运动条件未能在本研究的女性中产生延长的EPOC，EPOC幅度的记录值表明，就该活动的总体能量消耗而言，它并不显著。得出的结论是，EPOC的幅度和持续时间似乎都与本研究中女性所选择的运动强度无关。
