A PRACTICAL METHOD OF ESTIMATING AN INDIVIDUALS MAXIMAL OXYGEN INTAKE
A PRACTICAL METHOD OF ESTIMATING AN INDIVIDUALS MAXIMAL OXYGEN INTAKE
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DOI：
10.1080/00140136108930512
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发表时间：
1961-01-01
期刊：
影响因子：
2.4
通讯作者：
WYNDHAM, CH
中科院分区：
文献类型：
--
作者：
MARITZ, JS;MORRISON, JF;WYNDHAM, CH
估计个人最大摄氧量的简单方法所依据的前提已经过检验。这些前提是：（a）心率和氧气摄入量在整个工作范围内是彼此的线性函数，直到个人的最大值;（B）该个体的氧气摄入量与该群体的氧气摄入量和工作速率之间的平均直线的偏差非常小，从而可以根据工作速率以合理的精确度估计对抗重力执行的任务的氧气摄入量;和（c）最大心率在群体平均值附近的个体变异性足够小，可以在常规测试程序中使用平均值而不会引入大的误差。前提（B）和（c）已得到本文报告结果的充分证实。假设（a）不是严格有效的，因为存在0.31量级的偏差。在大多数个体中，在高水平工作时，与心率和氧摄入量相关的直线中的氧/分钟。Astrand（1954）提出的基于这些前提的方法所涉及的误差已被检验，并与本文所述的另一种方法的误差进行了比较。最大摄氧量的方差使用Astrand方法，由于在单独的心率测量误差，是0.53的顺序，与本文所述的程序的0.26相比。此外，在Astrand方法中仅测量一次心率会引入约0.31的偏倚。氧/分钟，在估计的个人最大氧容量为3.0 1./本方法的最大氧摄入量的方差可以通过用最小二乘法将直线拟合到在四个工作速率下的四对心率和氧摄入量值的曲线图来减小。
The premises upon which simple methods for estimating an individual''s maximum oxygen intake are based have been tested. These premises are (a) that heart rate and oxygen intake are linear functions of each other throughout the entire range of work up to the individual''s maximum; (b) that oxygen intake of the individual deviates very little from the mean straight line relating oxygen intake and rate of work for the population, so that the oxygen intake for a task performed against gravity can be estimated with reasonable precision from the rate of work; and (c) that the individual variability of maximum heart rate round the mean for the population is sufficiently small to use the mean in a routine test procedure without the introduction of large errors. Premises (b) and (c) are fully substantiated by the results reported here. Premise (a) is not strictly valid, as there is a bias of the order of 0.3 1. oxygen/min in the straight line relating heart rate and oxygen intake at high levels of work in most individuals. The errors involved in the method proposed by Astrand (1954) based on these premises have been examined and compared with those of an alternative procedure described in the present paper. The variance of maximum oxygen intake using the Astrand method, due to errors in measurement of heart rate alone, is of the order 0.53, compared with 0.26 of the procedure described in this paper. In addition, one measurement only of heart rate in the Astrand method introduces a bias of about 0.31. oxygen/min in the estimate of an individual maximum oxygen capacity of 3.0 1./min. The variance of maximum oxygen intake by the present method can be reduced by fitting a straight line by least squares to plots of four pairs of heart rate and oxygen intake values at four rates of work.