The Effect of Divided Attention with Bounce Drop Jump on Dynamic Postural Stability
The Effect of Divided Attention with Bounce Drop Jump on Dynamic Postural Stability
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DOI：
10.1055/a-1161-9081
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发表时间：
2020-10-01
影响因子：
2.5
通讯作者：
Lee, Heng-Ju
中科院分区：
文献类型：
--
作者：
Lin, Jian-Zhi;Tai, Wei-Hsun;Lee, Heng-Ju
本研究确定了在垂直跳跃任务中分散注意力对控制姿势稳定性的影响。总共有30名参与者接受了从30厘米高的平台上垂直跳下和单腿着地的测试，有或没有分散注意力的任务。同时收集三维标记轨迹和地面反作用力。在有或没有分散注意任务的情况下，分析了垂直地面反力、加载率和动态姿态稳定性指标。配对样本t检验结果显示，分散注意任务中膝关节屈曲角度较低，垂直地面反力较大，加载率较高。此外，被试在分注意任务中的垂直稳定性指数和动态姿势稳定性指数均高于非分注意任务。因此，结果表明，分散注意力任务可能影响姿势控制，导致动态姿势稳定性差，可能增加下肢损伤的风险。分散注意力任务对运动质量的影响可能表明运动员的注意力不再集中在弹跳、落跳动作上。因此，弹跳落跳结合动态姿态稳定性指标可用于姿态稳定性筛选。
This study determined the effect of divided attention on controlling postural stability during a drop vertical jump task. In total, 30 participants were tested for drop vertical jumps from a 30-cm high platform and landing on a single leg with or without divided attention tasks. Three-dimensional marker trajectories and ground reaction forces were collected simultaneously. Vertical ground reaction force, loading rate, and dynamic postural stability index were analyzed with or without divided attention tasks. The paired sample t test indicated a significantly low knee flexion angle, high vertical ground reaction force, and increased loading rate in the divided attention task. Moreover, participants showed an increased vertical stability index and dynamic postural stability index in the divided attention task than in the nondivided attention task. Thus, results demonstrated that the divided attention task could affect posture control, leading to poor dynamic posture stability and possibly increasing lower extremity injury risk. The influence of the divided attention task on movement quality likely indicates that an athlete can no longer focus his attention on the bounce drop jump maneuver. Therefore, the bounce drop jump combined with dynamic postural stability index could be used in posture stability screening.