Swain D P, Leutholtz B C, King M E, Haas L A, Branch J D
Wellness Institute and Research Center, Old Dominion University, Norfolk, VA 23529-0196, USA.
Med Sci Sports Exerc. 1998 Feb;30(2):318-21. doi: 10.1097/00005768-199802000-00022.
For exercise prescription purposes, it is often assumed that % heart rate reserve (%HRR) provides equivalent intensities to %VO2max. However, a recent study from this laboratory demonstrated that during cycling exercise %HRR is not equivalent to %VO2max, but is instead equivalent to a percentage of the difference between resting and maximal VO2, i.e., % VO2reserve (%VO2R). The current study examined these relationships during treadmill exercise. Fifty adults performed Bruce protocol treadmill tests to exhaustion. For each subject, data obtained at rest, at the end of each stage, and at maximum were used to determine linear regressions of %HRR versus %VO2max, and of %HRR versus %VO2R. For %HRR versus %VO2max the mean intercept and slope were -6.1+/-0.7 and 1.10+/-0.01, respectively, with a mean r of 0.990+/-0.002. For %HRR versus %VO2R, the mean intercept and slope were 1.5+/-0.6 and 1.03+/-0.01, respectively, with a mean r of 0.990+/-0.002. Both regressions differed statistically from the line of identity (i.e., intercept of 0 and slope of 1). However, the regression of %HRR versus %VO2R was significantly closer (P < 0.001 ) to the line of identity than was the regression of %HRR versus %VO2max. We conclude that %HRR should be considered as an indicator of %VO2R, not %VO2max, when prescribing treadmill exercise, as was previously concluded for cycling exercise.
出于运动处方的目的，人们通常认为心率储备百分比（%HRR）与最大摄氧量百分比（%VO2max）提供的运动强度相当。然而，本实验室最近的一项研究表明，在骑自行车运动期间，%HRR并不等同于%VO2max，而是等同于静息和最大摄氧量之间差值的一个百分比，即摄氧量储备百分比（%VO2R）。本研究在跑步机运动期间检验了这些关系。50名成年人进行了布鲁斯方案跑步机力竭试验。对于每个受试者，在静息状态、每个阶段结束时以及运动至最大强度时获取的数据用于确定%HRR与%VO2max以及%HRR与%VO2R的线性回归。对于%HRR与%VO2max，平均截距和斜率分别为-6.1±0.7和1.10±0.01，平均r值为0.990±0.002。对于%HRR与%VO2R，平均截距和斜率分别为1.5±0.6和1.03±0.01，平均r值为0.990±0.002。这两个回归在统计学上均与恒等线（即截距为0且斜率为1的线）不同。然而，%HRR与%VO2R的回归比%HRR与%VO2max的回归显著更接近（P<0.001）恒等线。我们得出结论，在开具跑步机运动处方时，%HRR应被视为%VO2R的指标，而非%VO2max的指标，这与之前关于骑自行车运动得出的结论一致。
