Yasuda K, Sasaki T, Shirado O, Yagi T, Monji J
Nihon Seikeigeka Gakkai Zasshi. 1985 Dec;59(12):1051-8.
An attempt was made to investigate the stress of the ACL in the simultaneous isometric contraction (IMC) of the quadriceps and the hamstrings by means of analysis of two-dimensional models, and to estimate electromyographically the forces of those muscles in that contraction. The anterior drawer force (ADF) in the simultaneous IMC decreased as the flexion angle of the knee increased. The average value of the angles, where the ADF became zero, was 7.4 degrees. The integrated EMGs of the quadriceps and the hamstrings in the simultaneous maximum IMC were equal to 30-60% of those in separate maximum IMC.
In the early stage of the rehabilitation after the ACL reconstruction, the simultaneous IMC of the quadriceps and the hamstrings is useful as one of the muscle exercise method, because that can be performed at the knee position near the full extension and can generate sufficient muscle force for exercise.
通过二维模型分析，试图研究股四头肌和腘绳肌同时等长收缩（IMC）时前交叉韧带（ACL）的应力，并通过肌电图估计这些肌肉在该收缩过程中的力量。同时IMC时的前抽屉力（ADF）随着膝关节屈曲角度的增加而降低。ADF变为零的角度平均值为7.4度。股四头肌和腘绳肌在同时最大IMC时的肌电图积分值等于单独最大IMC时的30%-60%。
在ACL重建后的康复早期，股四头肌和腘绳肌同时IMC作为一种肌肉锻炼方法是有用的，因为这可以在接近完全伸展的膝关节位置进行，并且可以产生足够的肌肉力量用于锻炼。
