高原不同居住时间健康男青年亚极量运动心率与做功效率的关系

RELATIONSHIP BETWEEN SUBMAXIMAL EXERCISE HEART RATE AND MECHAMICAL EFFICIENCY IN HEALTHY YOUNG MEN LIVING AT HIGH ALTIUDE FOR DIFFERENT TIMES

目的 :探讨高原不同居住时间健康男青年亚极量运动心率与做功效率的关系 ,寻找评价高原人体做功效率 ( η)的简便指标 ;方法 :在平原和高原 (海拔 3 680m)分别测定健康男青年的 90W运动心率 (HR90W)和耗氧量 (Vo2 ) ,根据公式计算各组的 η。采用直线相关的统计公式 ,计算HR90W与 η和Vo2 之间是否存在线性关系 ;结果 :各组的HR90W与 η呈负的直线相关 ,相关系数 (γ)为 -0 .9879,P <0 .0 1;结论 :在一定条件下 ,可以用亚极量运动心率代替做功效率或耗氧量 ,评价人体做功能力的大小 ,也即在劳动负荷相同的条件下 ,劳动者心率越低 ,表明其所需摄氧量越低 ,而做功效率越高。

To study the relationship between submaximal exercise heart rate and mechanical efficiency(η)of people living at high altitude(HA) for different times and to find out a simple index to evaluate HA people's η.Methods:The exercise heart rate at 90W(HR90W)and oxygen uptake (Vo 2)in healthy young men living at lowland(500m altitude) and HA(3 680m altitude)for different times were measured and then their η were calculated respectively.And the correlation among all index was decided by linear correlation equation.Results:HR90w was related with their η and Vo 2,and the γ= -0.9879 and 0.9851 respectively (P<0.01).Conclusions:The η and Vo 2 idecs can be displaced by submaximal exercise HR under a certain condition.That is to say,if the work laod is same in some people ,the lower HR induces a lower oxygen consumption and a higher mechanical effciency.