The effect of a secondary cognitive task on landing mechanics and jump performance
The effect of a secondary cognitive task on landing mechanics and jump performance
复制标题
DOI：
10.1080/14763141.2016.1265579
复制
发表时间：
2018-01-01
影响因子：
2.2
通讯作者：
Zhu, Qin
中科院分区：
文献类型：
--
作者：
Dai, Boyi;Cook, Ross F.;Zhu, Qin
前交叉韧带（ACL）损伤通常发生在跳跃着陆任务中，此时个体的注意力同时分配到其他物体和任务上。本研究的目的是探讨由次级认知任务施加的注意分配对着陆力学和跳跃性能的影响。38名休闲运动员在三种条件下进行跳跃着陆任务：不计数，从随机给定的数字向后计数1秒，从随机给定的数字向后计数7秒。收集并分析了三维运动学和地面反作用力。与不计数条件相比，受试者在按1秒计数条件下显示出初始接触时膝关节屈曲角降低（p=0.001）。参与者还显示，在着陆的前100 ms期间，后部和垂直地面反作用力峰值增加（p0.023），跳跃高度降低（p
Anterior cruciate ligament (ACL) injuries commonly occur during jump-landing tasks when individuals' attention is simultaneously allocated to other objects and tasks. The purpose of the current study was to investigate the effect of allocation of attention imposed by a secondary cognitive task on landing mechanics and jump performance. Thirty-eight recreational athletes performed a jump-landing task in three conditions: no counting, counting backward by 1s from a randomly given number, and counting backward by 7s from a randomly given number. Three-dimensional kinematics and ground reaction forces were collected and analysed. Participants demonstrated decreased knee flexion angles at initial contact (p=0.001) for the counting by 1s condition compared with the no counting condition. Participants also showed increased peak posterior and vertical ground reaction forces during the first 100ms of landing (p0.023) and decreased jump height (p