Gajdosik R L, Giuliani C A, Bohannon R W
Department of Physical Therapy, University of Montana, USA.
Clin Biomech (Bristol). 1990 Feb;5(1):23-9. doi: 10.1016/0268-0033(90)90028-5.
This study examined the passive compliance and length of the hamstring muscles of 15 healthy men and 15 healthy women (ages 21-37) with passive straight-leg-raising between 65° and 80°. Subjects were positioned on their left sides with the pelvis stabilized and the right thigh fixed at 90° on a horizontal platform. After three practice trials of maximal passive knee extension, subjects received three trials for data collection. Muscle activity was monitored with surface EMG and passive resistance to knee extension was measured with a dynamometer as the limb was photographed at six force-dependent positions. The passive compliance was computed as the ratio of the change in the knee angle (ΔAngle) to the change in passive torque (ΔTorque), (ΔAngle/ΔTorque). Hamstring muscle lengths were measured simultaneously. An ANovA revealed a difference (P = 0·001) between the passive compliance ratios of the men (1·4 ± 0·-03) and women (2·2 ± 0·08) but not between their initial knee angles or their maximal knee angles. Independent t-tests showed a difference (P < 0·001) between the maximal passive torque of the men (41·4 ± 5·7 Nm) and women (27·4 ± 7·7 Nm). The torques were not different when standardized to body mass. Although ANOVAS showed that the absolute hamstring muscle lengths differed between genders, they were not different when standardized as a percentage of the femur length.
本研究对15名健康男性和15名健康女性（年龄21 - 37岁）在被动直腿抬高65°至80°时腘绳肌的被动顺应性和长度进行了检测。受试者左侧卧位，骨盆固定，右大腿在水平平台上固定于90°。在进行三次最大被动膝关节伸展的练习试验后，受试者进行三次数据收集试验。通过表面肌电图监测肌肉活动，并在肢体处于六个与力相关的位置拍照时，用测力计测量膝关节伸展的被动阻力。被动顺应性计算为膝关节角度变化（Δ角度）与被动扭矩变化（Δ扭矩）的比值（Δ角度/Δ扭矩）。同时测量腘绳肌长度。方差分析显示男性（1.4±0.03）和女性（2.2±0.08）的被动顺应性比值存在差异（P = 0.001），但他们的初始膝关节角度或最大膝关节角度之间没有差异。独立样本t检验显示男性（41.4±5.7 Nm）和女性（27.4±7.7 Nm）的最大被动扭矩存在差异（P < 0.001）。按体重标准化后，扭矩没有差异。尽管方差分析表明两性之间腘绳肌的绝对长度不同，但按股骨长度百分比标准化后，它们没有差异。
