用于周期性疲劳方案的肌电图（EMG）归一化方法。
Electromyographic (EMG) normalization method for cycle fatigue protocols.
作者信息
Hunter Angus M, St Clair Gibson Allan, Lambert Michael, Noakes Timothy D
机构信息
MRC/UCT Research Unit of Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town, South Africa.
出版信息
Med Sci Sports Exerc. 2002 May;34(5):857-61. doi: 10.1097/00005768-200205000-00020.
PURPOSE
To determine the most effective electromyographic (EMG) normalization method for cycling fatigue protocols.
METHODS
Ten healthy subjects performed two 5-s isometric knee extension maximal voluntary contractions (MVC) at a knee joint angle of 60 degrees, two fixed cycle pedal contraction at knee joint angles of 60 degrees (60 degrees A) and 108 degrees (108 degrees A), and a dynamic single maximal revolution of a cycle pedal (1REV). Integrated EMG (IEMG) data were recorded for all contractions and power output recorded during MVC and 1REV.
RESULTS
Mean IEMG for MVC was significantly (P < 0.01) greater than 60 degrees C, 108 degrees C, and 1REV. There were no significant differences between MVC and 1REV power output/EMG relationship.
CONCLUSIONS
MVC will record a higher IEMG than 60 degrees A, 108 degrees A, and 1REV. As IEMG was greatest during MVC, and the relationship between IEMG and power output was not different between MVC and 1REV, normalization against maximal possible recruitment potential is most likely during MVC.
目的
确定用于自行车疲劳试验方案的最有效的肌电图（EMG）标准化方法。
方法
10名健康受试者在膝关节角度为60度时进行两次5秒的等长膝关节伸展最大自主收缩（MVC），在膝关节角度为60度（60度A）和108度（108度A）时进行两次固定周期踏板收缩，并进行一次自行车踏板的动态单最大旋转（1REV）。记录所有收缩的积分肌电图（IEMG）数据以及MVC和1REV期间记录的功率输出。
结果
MVC的平均IEMG显著高于（P < 0.01）60度C、108度C和1REV。MVC和1REV的功率输出/EMG关系之间无显著差异。
结论
MVC记录的IEMG高于60度A、108度A和1REV。由于MVC期间IEMG最大，且MVC和1REV之间IEMG与功率输出的关系无差异，因此在MVC期间最有可能根据最大可能募集潜力进行标准化。
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