Hanson C T, Joslow B, Danoff J V, Alon G
Arch Phys Med Rehabil. 1981 Dec;62(12):631-4.
The electromyographic (EMG) outputs of the biceps brachii, brachialis, and brachioradialis muscles of 14 subjects were monitored during the application of an externally generated, dislocating force across the elbow joint. Subjects were seated in an apparatus designed to maintain the right upper extremity at 90 degrees shoulder flexion and 180 degrees elbow extension. The dislocating force was increased from 0-22 Newtons (N) at an average rate of 2N/sec to determine if a minimum load were necessary before muscles would be activated. Although no muscle was found to be significantly more active than any other over the entire load range, post hoc analysis showed that both the brachialis and brachioradialis were significantly more active at loads above 18N than below. The biceps brachii showed no significant increase in activity. The practice of strengthening muscles as a means of protecting joint integrity can be questioned by these results since the muscles under study did little to resist elbow joint dislocation at loads up to 18N.
在对14名受试者的肘关节施加外部产生的脱位力时，监测肱二头肌、肱肌和肱桡肌的肌电图（EMG）输出。受试者坐在一个装置中，该装置旨在将右上肢保持在肩部屈曲90度和肘部伸展180度的位置。脱位力以平均2N/秒的速度从0增加到22牛顿（N），以确定在肌肉被激活之前是否需要最小负荷。尽管在整个负荷范围内没有发现任何一块肌肉比其他肌肉明显更活跃，但事后分析表明，在负荷高于18N时，肱肌和肱桡肌的活跃程度明显高于负荷低于18N时。肱二头肌的活动没有显著增加。这些结果可能会对通过增强肌肉来保护关节完整性的做法提出质疑，因为在所研究的负荷高达18N的情况下，所研究的肌肉在抵抗肘关节脱位方面作用甚微。
