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首页> 外文会议>Human Factors and Ergonomics Society annual meeting;HFES 2002 >INDICES OF MUSCLE FATIGUE
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INDICES OF MUSCLE FATIGUE

机译：肌肉疲劳指数

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The objective of the study was to determine if any of the many indicators of localized muscle fatiguern(LMF) mirrors the decline in force more closely (gold standard). If not, can a group of indicators canrnpredict LMF better? Nine normal young subjects were required to exert their maximal voluntaryrncontraction (MVC) and 40% of MVC in elbow flexion as long as they could. The magnitude of the force,rnEMG amplitude, median frequency (MF), muscle bed blood volume, and muscle oxygenation werernmeasured for MVC. For the 40% MVC contraction in addition to the foregoing variables oxygen uptakern(VOz), ventilation volume and heart rate were also measured. The rate of perceived exertion (WE),rnvisual analog score (VAS) and body part discomfort rating (BPDR) were measured for both contractions.rnData were subjected to the analysis of variance (ANOVA) with repeated measures, correlation andrnregression analysis. Different percentiles of the tasks were significantly different in both contractionsrn(p<0.001). The MF was the strongest indicator of the force decline in MVC (r = 0.91; p<0.001) but inrn40% MVC the VAS was a better indicated. None of the variables consistently represented LMF inrndifferent levels of contraction. A different grouping of objective and subjective measures for MVC andrn40% MVC increased the predictability of the force decline (LMF).
机译：该研究的目的是确定局部肌肉疲劳（LMF）的许多指标中的任何一个是否更紧密地反映了力量的下降（黄金标准）。如果不是，那么一组指标能否更好地预测LMF？九名正常的年轻受试者被要求尽其最大的自愿性收缩力（MVC）和肘关节屈曲力的40％。测量MVC的力大小，EMG幅值，中位频率（MF），肌肉床血容量和肌肉氧合作用。除了上述变量外，对于40％的MVC收缩，还测量了摄氧量（VOz），通气量和心率。测量两个收缩时的感觉运动率（WE），视觉模拟评分（VAS）和身体部位不适等级（BPDR）。对数据进行重复测量，相关性和回归分析进行方差分析（ANOVA）。两种收缩方式的任务百分位数均显着不同（p <0.001）。 MF是MVC力下降的最强指标（r = 0.91； p <0.001），但MVC值不超过40％时，VAS更好。没有一个变量能够始终如一地代表LMF不变的收缩水平。针对MVC和40％MVC的客观和主观测量方法的不同分组增加了力量下降（LMF）的可预测性。

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