未经训练的受试者在阶梯运动中的耐力适应性和血乳酸浓度
Endurance fitness and blood lactate concentration during stepping exercise in untrained subjects.
作者信息
Richardson S, Hardman A E
机构信息
Department of Physical Education and Sports Science, University of Technology, Loughborough, Leicestershire.
出版信息
Br J Sports Med. 1989 Sep;23(3):190-3. doi: 10.1136/bjsm.23.3.190.
The purpose of the present study was to explore the possibility that reference blood lactate concentrations, determined during stepping exercise, could be used to derive an index of endurance fitness. The traditional measure of endurance fitness, maximal oxygen uptake (VO2max) and the individual relationships between blood lactate concentration and submaximal VO2 were determined during stepping for 10 untrained males. VO2 max values were 48.7 +/- 5.1 ml.kg-1.min-1 (mean +/- sd). The time to exhaustion during stepping at 80 per cent VO2 max (38.82 +/- 17.83 min) provided an additional measure of endurance fitness. The per cent VO2 max at a blood lactate concentration of 4 mM was correlated significantly with endurance time (rho = 0.75, P less than 0.05). These results show that a submaximal step test can be used to determine oxygen uptake and per cent VO2 max at a reference blood lactate concentration. However, for this group of subjects, per cent VO2 max at a blood lactate concentration of 4 mM showed only a modest correlation with endurance.
本研究的目的是探讨在阶梯运动期间测定的参考血乳酸浓度能否用于得出耐力适应性指数的可能性。对10名未经训练的男性在进行阶梯运动时测定了耐力适应性的传统指标——最大摄氧量（VO2max）以及血乳酸浓度与次最大摄氧量之间的个体关系。VO2max值为48.7±5.1毫升·千克⁻¹·分钟⁻¹（平均值±标准差）。在80%VO2max强度下进行阶梯运动至力竭的时间（38.82±17.83分钟）提供了另一种耐力适应性指标。血乳酸浓度为4毫摩尔时的VO2max百分比与耐力时间显著相关（ρ=0.75，P<0.05）。这些结果表明，次最大阶梯试验可用于在参考血乳酸浓度下测定摄氧量和VO2max百分比。然而，对于这组受试者，血乳酸浓度为4毫摩尔时的VO2max百分比与耐力仅呈现中等程度的相关性。
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