The effect of choice reaction task on impact of single-leg landing
The effect of choice reaction task on impact of single-leg landing
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DOI：
10.1016/j.gaitpost.2011.03.011
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发表时间：
2011-05-01
期刊：
影响因子：
2.4
通讯作者：
Oda, Shingo
中科院分区：
文献类型：
--
作者：
Shinya, Masahiro;Wada, Osamu;Oda, Shingo
本研究旨在探讨跳跃后单腿着地时的注意需求。实验采用双任务测验。12名健康的男性参与者被要求进行双腿跳跃，右腿尽可能轻柔地落地。通过充分的练习，跳跃的飞行时间被设置为300毫秒。作为一项认知任务，参与者被要求在收到信号后立即按下右侧或左侧的定制按钮。起飞信号出现的时间从0到300毫秒不等。随机插入未呈现进行信号的捕获试验。结果表明，双任务条件下的最大垂直地面反力大于单任务条件下的最大垂直地面反力。无论发出信号的时间如何，最大垂直地面反作用力的增加都是一致的，在捕获试验中也观察到了同样的效果。这些结果表明，双重任务效应是由选择反应时任务的注意分配引起的。运动员在执行认知任务时，在着陆过程中可能会受到较大的地面反作用力。(C)2011 Elsevier B.V.保留所有权利。
This study aimed to investigate attentional demand during single-leg landing after a jump. The experiment was set up as dual-task test. Twelve healthy male participants were instructed to make a two-leg jump with right-leg landing as softly as possible. The flight time of the jump was set to 300 ms through sufficient practice. As a cognitive task, the participants were asked to push the right or left custom-made button as soon as a go-signal was presented. The timing when the go-signal presented varied from 0 to 300 ms from the take-off. Catch trials in which the go-signal was not presented were randomly inserted. The results showed that the maximum vertical ground reaction force after touchdown was greater under the dual-task condition than in the single-task condition. Increase in the maximum vertical ground reaction force was consistent regardless of the timing of presenting the go-signal, and the same effect was observed in the catch trials. These results indicate that the effect of dual tasking was caused by attentional allocation to the choice reaction time task. Athletes may be exposed a large ground reaction forces during landing while performing cognitive tasks. (C) 2011 Elsevier B.V. All rights reserved.