健康人运动中无氧阈气体交换法的测定结果

DETERMINATION OF ANAEROBIC THRESHOLD DURING INCREMENTAL EXERCISE TEST IN HEALTHY SUBJECTS

本文采用气体交换法测定了20名健康人运动中的无氧阈结果。每名受试者在自行车测功器上完成递增运动试验,功率为每分钟增加15瓦,直至力竭完不成定量。受试者的呼出气测定结果除直接记录外,还通过模拟计算机输入计算机系列以备分析。对10名受试者在2～3周后作了重复测定,结果显示二次测定的各数值在统计上未见显著差别。最后,讨论了无氧阈测定的方法、范围、应用和它的限制。

Twenty subjects participated in this study. Every subject comprised an incremental work test on Lanooy cycle ergometer, the work rate was increased in steps of 15W/min until the subject was unable to sustain the workrate. During the test the subject breath through a turbine volume transducer, the gas was measured by method of breath-by-breath. The electrical output of the expired airflow, and the O_2 and CO_2 signals were recorded directly on a 12-channel chart recorder, these signals underwent analog-to-digital conversion and were transmitted to a digital minicomputer. The anaerobic threshold and gas exchange results were analyzed in 20 subjects in detail. Retest of anaerobic threshold and gas exchange were done in ten subjects after 2-3 weeks. There were no significant differences between test-retest of VO_2 max, VEmax, Rmax, maximal work rate, maximal heart rate and maximal oxygen pulse. The method, prevalance, application and limitation for determination of the anaerobic threshold were discussed.