腿筋拉伤
地面反作用力
起飞
刚度
肌电图
医学
肌肉僵硬
物理医学与康复
跳跃的
跳跃
垂直跳跃
物理疗法
材料科学
结构工程
物理
运动学
工程类
复合材料
经典力学
量子力学
生理学
作者
Amornthep Jankaew,Yih-Kuen Jan,Ing Shiou Hwang,Li-Chieh Kuo,Cheng-Feng Lin
标识
DOI:10.1080/14763141.2023.2219670
摘要
It is unclear how hamstring stiffness influences lower limb muscle activation during jump-landing mechanics. The study aimed to investigate the role of the hamstring stiffness on lower limb muscle recruitment during jumping manoeuvres. Thirty male athletes were recruited and allocated into high- and low-stiffness groups. Hamstring stiffness was determined as the average stiffness of bilateral hamstrings using a MyotonPRO. Surface electromyography of the bilateral gluteus maximus, quadriceps, and hamstring muscles was assessed during the takeoff, at ground contact, and at landing, while ground reaction force (GRF) was measured during the squat jump, countermovement jump, and drop vertical jump. The results showed that athletes with greater hamstring stiffness exhibited a higher median frequency of the lateral hamstrings in both limbs and the vastus medialis in the dominant limb than the low-stiffness group during takeoff, adjustment, and landing phases for all vertical jumps. The high stiffness group landed with lower vertical GRF in the drop vertical jump. In conclusion, athletes with high hamstring stiffness showed greater motor unit recruitment during takeoff and landing phases. This recruitment did not influence takeoff performance but aid with absorbing landing force. Therefore, the contribution of the lower limb muscle stiffness should be considered in sports activities.
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