The effect of performance demands on lower extremity biomechanics during landing and cutting tasks
The effect of performance demands on lower extremity biomechanics during landing and cutting tasks
复制标题
DOI：
10.1016/j.jshs.2016.11.004
复制
发表时间：
2019-05-01
影响因子：
11.7
通讯作者：
Yu, Bing
中科院分区：
文献类型：
--
作者：
Dai, Boyi;Garrett, William E.;Yu, Bing
背景：前十字韧带(ACL)损伤通常发生在着陆和切割任务的早期阶段，涉及突然减速。本研究的目的是探讨跳跃高度和跳跃速度对停止跳跃任务中肢体生物力学的影响，以及切割速度对侧切任务中下肢生物力学的影响。方法：36名休闲运动员在快速跳跃、最大高度跳跃3种条件下进行停跳。跳到最大高度的60%。参与者还在两种情况下进行了侧切任务：以最大速度切割和以最大速度的60%切割。结果：在快速跳跃状态下，后方地面反作用力峰值(PPGRF)增大。PPGRF时膝关节伸展力矩、膝关节僵硬程度和膝关节屈曲角度较最大高度跳跃状态下有所降低。与最大高度跳跃相比，60%最大高度跳跃导致膝关节屈曲角度减小。与60%最大速度切割相比，受试者表现出更大的PPGRF、PPGRF的膝关节伸展力矩、PPGRE膝关节僵硬时的膝关节外翻角度和内翻力矩，以及膝关节屈曲角度。结论：以更高的跳跃速度进行跳跃着陆导致了先前与前交叉韧带负荷增加相关的下肢运动模式。切割速度对肢体生物力学也有影响。在设计前交叉韧带损伤风险筛查和损伤预防方案时，需要考虑跳跃速度和切割速度。(C)爱思唯尔公司代表上海体育大学出版的《2019年》。
Background: Anterior cruciate ligament (ACL) injuries commonly occur during the early phase of landing and cutting tasks that involve sudden decelerations. The purpose of this study was to investigate the effects of jump height and jump speed on lower extremity biomechanics during a stop-jump task and the effect of cutting speed on lower extremity biomechanics during a side-cutting task.Methods: Thirty-six recreational athletes performed a stop-jump task under 3 conditions: jumping fast, jumping for maximum height. and jumping for 60% of maximum height. Participants also performed a side-cutting task under 2 conditions: cutting at maximum speed and cutting at 60% of maximum speed. three-dimensional kinematic and kinetic data were collected.Results: The jumping fast condition resulted in increased peak posterior ground reaction force (PPGRF). knee extension moment at PPGRF, and knee joint stiffness and decreased knee flexion angle compared with the jumping for maximum height condition. The jumping for 60% of maximum height condition resulted in decreased knee flexion angle compared with the jumping for maximum height condition. Participants demonstrated greater PPGRF, knee extension moment at PPGRF, knee valgus angle and varus moment at PPGRE knee joint stiffness, and knee flexion angle during the cutting at maximum speed condition compared with the cutting at 60% maximum speed condition.Conclusion: Performing jump landing at an increased jump speed resulted in lower extremity movement patterns that have been previously associated with an increase in ACL loading. Cutting speed also affected lower extremity biomechanics. Jump speed and cutting speed need to be considered when designing ACL injury risk screening and injury prevention programs. (C) 2019 Published by Elsevier B.V. on behalf of Shanghai University of Sport.