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通过观察12名青少年赛艇运动员递增负荷运动时的肌氧变化以及运动过程中肌氧含量的变化与气体代谢参数的关系。结果发现:1、增负荷运动时,肌氧含量呈台阶状下降即负荷较低时,肌氧在刚加负荷时迅速下降之后保持平衡或升高,负荷较高时肌氧持续下降。接近力竭时,一部分运动员出现平台,运动停止有超量恢复现象。肌氧的变化与血容量高度相关。2、肌氧含量与摄氧量(r=0.971to0.993)、心率(r=0.943-0.993)均高度相关。肌氧下降时出现拐点比通气阈稍早。说明了局部运动肌氧供需的失衡推测与无氧阈的出现有一定关系,、外周肌氧动力学反映了系统氧摄取。
By observing the changes of the muscle oxygen and the changes of the muscle oxygen content of 12 juvenile rowing athletes during the progressive load exercise and the gas metabolism parameters. The results showed that: (1) During the exercise of increasing load, the content of muscle oxygen decreased stepwise, that is, when the load was low, the muscle oxygen kept balance or increased rapidly after the load was rapidly decreased, and the muscle oxygen decreased continuously when the load was higher. Nearly exhausted, some athletes appear platform, stop exercising excess recovery phenomenon. Changes in muscle oxygen and blood volume are highly correlated. Muscle oxygen content and oxygen uptake (r = 0.971to0.993), heart rate (r = 0.943-0.993) were highly correlated. Inflection point when the muscle oxygen decreased ventilation earlier than the threshold. It shows that there is a certain relationship between the imbalance of supply and demand of muscle oxygen and the occurrence of anaerobic threshold in local exercise, and the peripheral oxygen metabolism reflects the systemic oxygen uptake.