运动中肌肉氧含量下降与肌肉疲劳的关系

The relationship of muscle oxygen decrease and its fatigue during exercising

肌肉的强烈收缩将导致疲劳,肌肉在疲劳状态下工作能力下降,并容易导致损伤,因而能否有效评价疲劳对监控运动负荷以及避免肌肉损伤具有重要意义。肌电指标是传统的评定肌肉疲劳的方法,在训练状态下不易获得,近红外光谱技术是一种无损的可以遥测组织氧含量的方法,由于氧含量下降可能与肌肉疲劳的发生相关,因而监测肌氧含量的下降程度可能是评定肌肉疲劳的新方法。

Intensive muscle contraction will cause fatigue,and under this condition,muscle is easy to be hurt and its work will be decreased. So a reasonable measurement of muscle fatigue is of great importance to control the work rate and avoid its being hurt. EMG signal is the traditional way to evaluate the fatigue point,but it is difficult to acquire during competition. NIRs as a measurement for tissue oxygen content can provide a noninvasive localized indication of the degree of O2 delivery stress continuously in excising,thus NIRs is expected to be a new way to monitor muscle fatigue because the decrease of oxygen content is possibly related to muscle fatigue.