J Orthop Sports Phys Ther. 1985;7(2):65-8. doi: 10.2519/jospt.1985.7.2.65.
Two hundred and forty-one females between the ages of 18 and 28 years were subjects for this study. Subjects were tested for knee extension and knee flexion on a Cybex(R) II isokinetic dynamometer at 60 degrees /sec using a modified seating arrangement which placed the back rest at 20 from the vertical. To familiarize subjects with the Cybex II, two practice trials of complete extension and flexion were allowed. The actual test included four consecutive trials of voluntary maximum isokinetic contractions of the knee extensors and flexors. The mean torque value of the knee extensors was 96.47 ft-lb and 51.77 ft-lb for the knee flexors. The corresponding ratio was 1.86: 1.00. The trials demonstrating the maximum peak torque values for the knee extensors and flexors were chosen to determine the time to peak torque. The mean time to peak torque for the knee extensors (2.76 sec) was only slightly longer (0.02 sec) than the mean time to peak torque for the knee flexors (2.78 sec). Based on the outcome of the investigation and the size of the sample, it is suggested that young and untrained women who have no history of health-related conditions of the knee demonstrate an approximate ratio of knee extensor strength to knee flexor strength of 2: 1 at 60 /sec. J Orthop Sports Phys Ther 1985;7(2):65-68.
本研究共有 241 名年龄在 18 至 28 岁的女性作为研究对象。在 Cybex（R）II 等速测力仪上，以 60 度/秒的速度对受试者进行膝关节伸展和弯曲测试，使用改良的坐姿，将靠背调整至 20 度倾斜。为了让受试者熟悉 Cybex II，允许进行两次完整伸展和弯曲的练习测试。实际测试包括连续四次自愿最大等速膝关节伸肌和屈肌收缩。膝关节伸肌的平均扭矩值为 96.47 英尺-磅，膝关节屈肌的平均扭矩值为 51.77 英尺-磅。相应的比值为 1.86:1.00。选择显示膝关节伸肌和屈肌最大峰值扭矩值的测试来确定达到峰值扭矩的时间。膝关节伸肌达到峰值扭矩的平均时间（2.76 秒）仅比膝关节屈肌达到峰值扭矩的平均时间（2.78 秒）长 0.02 秒。基于调查结果和样本量，建议没有膝关节健康相关问题病史的年轻未受过训练的女性在 60 /秒时表现出大约 2:1 的膝关节伸肌力量与膝关节屈肌力量的比值。J Orthop Sports Phys Ther 1985;7(2):65-68.
