不同定量负荷运动持续时间对推算最大累积氧亏的影响

Effect of Different Submaximal Exercise Durations on the Maximal Accumulated Oxygen Deficit

目的：探讨采用不同定量负荷运动持续时间对推算最大累积氧亏（MAOD）的影响。方法：以15名体育系健康男性大学生为研究对象，每位受试者均接受一次VO：max测试、5次不同强度（25％、40％、55％、70％、85％VOm2ax）定量负荷运动、一次2～3min强度为120％VO2max的超大强度运动测试。结果：当定量负荷运动持续时间少于4min时，VO2一运动强度回归曲线斜率、ETED、MAOD均与Medbo确定的10min持续时间所获值差异显著（P〈0．01），而持续时间在4min以上时，虽然各值小于10min持续时间所获值，但差异不显著。结论：定量负荷运动持续时间少于4min会降低MAOD值，为简化实验过程，可将运动持续时间缩短到4～6min。

Objective To examine the effect of different exercise durations on the calculated accu- mulated O2 deficit （MAOD）. Methods Fifteen healthy male volunteers participated in this study. They were asked to perform 5 × 10min submaximal exercise bouts （with intensities of 25%,40%,55%, 70%,85%VO2max） and a supramaximal exercise bout on bicycle at 120% of VO2max for 132.2±33.6s to exhaustion. The O2 uptake was measured at 2-4,4-6,6-8 and 8-10min of the test at the five different constant powers. Results MAOD calculated from 2-4min exercises （35.8±4.0ml·kg^-1 · min^-1） were significantly lower than the value calculated from longer than 8-10min of exercise （44.3±2.4 ml/kg/min）. Conclusions For simplifying testing procedure, submaximal exercise duration can be shortened to 4-6min.