De Ste Croix Mark, ElNagar Youssif O, Iga John, Ayala Francisco, James David
Exercise and Sport Research Centre, School of Sport and Exercise, Faculty of Applied Sciences, University of Gloucestershire, UK.
Exercise and Sport Research Centre, School of Sport and Exercise, Faculty of Applied Sciences, University of Gloucestershire, UK.
Knee. 2017 Aug;24(4):745-750. doi: 10.1016/j.knee.2017.03.012. Epub 2017 Apr 13.
Females are two to eight times more likely to suffer a non-contact injury compared with males thus the purpose of this study was to explore the influence of joint angle and movement velocity on sex differences in the functional hamstring to quadriceps ratio (H/Q).
Isokinetic concentric and eccentric torque were determined in 110 participants (55 males and 55 females) through a 90° range of movement at 60, 120, and 240°/s. Testing was performed with the hip flexed at 10°. The H/Q was determined at three specific joint angles (15, 30 and 45° flexion) and where peak torque occurred for concentric knee extension.
A significant interaction effect (P<0.01) for sex and joint angle was observed with women demonstrating a lower H/Q than males, especially at more extended knee positions. A significant sex by velocity interaction (P<0.01) indicated a lower H/Q in women as velocity increased. Significant main effects (P<0.01) indicated that irrespective of sex the H/Q increased as the knee extends and velocity increases.
Given the reduced H/Q in females compared to males at more extended knee positions and faster velocities, this may contribute to the observed sex bias in reported injury rates.
与男性相比，女性遭受非接触性损伤的可能性要高出两到八倍。因此，本研究的目的是探讨关节角度和运动速度对功能性绳肌与股四头肌比率（H/Q）性别差异的影响。
对110名参与者（55名男性和55名女性）进行等速向心和离心扭矩测定，运动范围为90°，速度分别为60、120和240°/秒。测试时髋关节屈曲10°。在三个特定关节角度（屈曲15、30和45°）以及向心膝关节伸展的峰值扭矩出现位置测定H/Q。
观察到性别和关节角度之间存在显著的交互作用（P<0.01），女性的H/Q低于男性，尤其是在膝关节更伸展的位置。性别与速度之间存在显著的交互作用（P<0.01），表明随着速度增加，女性的H/Q降低。显著的主效应（P<0.01）表明，无论性别如何，随着膝关节伸展和速度增加，H/Q都会升高。
鉴于在膝关节更伸展的位置和更快的速度下，女性的H/Q低于男性，这可能导致了报告的损伤率中观察到的性别偏差。
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