Yasuda K, Sasaki T, Shirado O, Yagi T, Monji J
Nihon Seikeigeka Gakkai Zasshi. 1985 Dec;59(12):1041-9.
An attempt was made to investigate the force of the anterior cruciate ligament (ACL) in separate isometric contraction (IMC) of the quadriceps and the hamstrings by means of the analysis of two-dimensional models. In IMC of the quadriceps, the average value of the anterior drawer force (ADF) was equal to 14% of the quadriceps tension at the knee flexion of 5 degrees. The ADF decreased as the flexion angle increased. The average value of the angles, where the ADF became zero, was 45.3 degrees, and the standard deviation was 12.5 degrees. In IMC of the hamstrings, the posterior drawer force was given at the every flexion angle.
In the early stage of the rehabilitation after the ACL reconstruction, the quadriceps exercise by IMC should be performed at the knee flexion of more than 70 degrees (average + 1.96 X S.D.). The hamstrings exercise by IMC can be carried out regardless of flexion angle.
通过二维模型分析，尝试研究股四头肌和腘绳肌等长收缩（IMC）时前交叉韧带（ACL）的受力情况。在股四头肌等长收缩时，屈膝5度时前抽屉力（ADF）的平均值等于股四头肌张力的14%。随着屈膝角度增加，ADF减小。ADF变为零时角度的平均值为45.3度，标准差为12.5度。在腘绳肌等长收缩时，每个屈膝角度都有后抽屉力。
在ACL重建术后康复早期，股四头肌等长收缩练习应在屈膝超过70度（平均值 + 1.96×标准差）时进行。腘绳肌等长收缩练习可在任意屈膝角度进行。
