Division of Sport Health and Exercise, University of Hertfordshire, Hatfield, UK.
Res Q Exerc Sport. 2010 Dec;81(4):384-91. doi: 10.1080/02701367.2010.10599698.
The aim of this study was to examine the effect of opposition and gender on knee kinematics and ground reaction force during landing from a volleyball block jump. Six female and six male university volleyball players performed two landing tasks: (a) an unopposed and (b) an opposed volleyball block jump and landing. A 12-camera motion analysis system (120 Hz) was used to record knee kinematics, and a force platform (600 Hz) was used to record ground reaction force during landing. The results showed a significant effect for level of opposition in peak normalized ground reaction force (p = .04), knee flexion at ground contact (p = .003), maximum knee flexion (p = .001), and knee flexion range of motion (p = .003). There was a significant effect for gender in maximum knee flexion (p = .01), knee flexion range of motion (p = .001), maximum knee valgus angle (p = .001), and knee valgus range of motion (p = .001). The changes in landing biomechanics as a result of opposition suggest future research on landing mechanics should examine opposed exercises, because opposition may significantly alter neuromuscular responses.
本研究旨在探讨在排球拦网跳落地时，对抗和性别对膝关节运动学和地面反作用力的影响。六名女性和六名男性大学排球运动员完成了两项落地任务：(a)无对抗和(b)有对抗的排球拦网跳和落地。使用 12 台摄像机运动分析系统（120 Hz）记录膝关节运动学，使用力台（600 Hz）记录落地时的地面反作用力。结果表明，在峰值归一化地面反作用力（p =.04）、触地时膝关节屈曲（p =.003）、最大膝关节屈曲（p =.001）和膝关节屈曲运动范围（p =.003）方面，对抗水平有显著影响。在最大膝关节屈曲（p =.01）、膝关节屈曲运动范围（p =.001）、最大膝关节外翻角度（p =.001）和膝关节外翻运动范围（p =.001）方面，性别有显著影响。对抗导致的落地生物力学变化表明，未来的落地力学研究应该检查对抗性练习，因为对抗可能会显著改变神经肌肉反应。
