Yasuda K, Sasaki T
Clin Orthop Relat Res. 1987 Jul(220):275-83.
The anterior or posterior drawer force exerted on the tibia by the separate isometric contractions of the quadriceps or hamstrings at various angles of knee flexion was examined in 20 healthy males. A two-dimensional model was analyzed using roentgenographic films. In separate isometric contractions of the quadriceps, the mean value of the anterior drawer force was equivalent to 14% of the tension of the quadriceps at 5 degrees knee flexion. The value decreased with the increase in the angle of knee flexion. The mean angle at which the anterior drawer force became zero was 45.3 degrees +/- 12.5 degrees. When the angle was increased further, the posterior drawer force gradually increased. In separate isometric contractions of the hamstrings, the posterior drawer force was exerted at all angles of flexion. Thus, during the early stage of rehabilitation after the anterior cruciate ligament injury, the quadriceps exercise by isometric muscle contraction should be performed with the knee flexion at more than 70 degrees (mean +/- 1.96). Exercise of the hamstrings by isometric muscle contractions can be carried out regardless of flexion angle.
对20名健康男性进行了研究，观察在不同膝关节屈曲角度下，股四头肌或腘绳肌单独等长收缩时施加于胫骨的前向或后向抽屉力。使用X线片分析二维模型。在股四头肌单独等长收缩时，膝关节屈曲5度时前向抽屉力的平均值相当于股四头肌张力的14%。该值随膝关节屈曲角度的增加而降低。前向抽屉力变为零的平均角度为45.3度±12.5度。当角度进一步增加时，后向抽屉力逐渐增大。在腘绳肌单独等长收缩时，在所有屈曲角度都会产生后向抽屉力。因此，在前交叉韧带损伤后的康复早期，等长肌肉收缩进行股四头肌锻炼时，膝关节应屈曲超过70度（平均值±1.96）。等长肌肉收缩进行腘绳肌锻炼可在任意屈曲角度下进行。
