The impact of joint angle and movement velocity on sex differences in the functional hamstring/quadriceps ratio

De Ste Croix, Mark B and Elnagar, Youssif O and Iga, John and Ayala, Francisco and James, David V (2017) The impact of joint angle and movement velocity on sex differences in the functional hamstring/quadriceps ratio. Knee. ISSN 0968-0160

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Joint angle and velocity paper Revised version with figures 20-03-17.pdf - Accepted Version
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Abstract

Objective: Females are 2-8 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/QFUNC). Methods: Isokinetic concentric and eccentric torque were determined in 110 participants (55 males and 55 females) through a 90° range of movement at 60, 120, 240°/s. Testing was performed with the hip flexed at 10°. The H/QFUNC was determined at 3 specific joint angles (15, 30 and 45° flexion) and where peak torque occurred for concentric knee extension. Results: A significant interaction effect (P <0.01) for sex and joint angle was observed with women demonstrating a lower H/QFUNC than males, especially at more extended knee positions. A significant sex by velocity interaction (P <0.01) indicated a lower H/QFUNC in women as velocity increased. Significant main effects (P < 0.01) indicated that irrespective of sex the H/QFUNC increased as the knee extends and velocity increases. Conclusion: Given the reduced H/QFUNC 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.

Item Type: Article
Article Type: Article
Uncontrolled Keywords: Injury risk; Functional H/Q ratio; Sex differences; Joint angle; Movement velocity
Subjects: Q Science > QP Physiology > QP301.H75 Physiology. Sport
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Schools and Research Institutes > School of Sport & Exercise > Sport and Exercise
Research Priority Areas: Sport, Exercise, Health & Wellbeing
Depositing User: Susan Turner
Date Deposited: 31 Mar 2017 13:24
Last Modified: 22 Apr 2017 17:37
URI: http://eprints.glos.ac.uk/id/eprint/4497

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