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在双重任务跳跳过程中分析脚不稳定的运动员的下肢运动和肌肉激活

Jian-Zhi Lin¹, Min-Hao Hung², Bo-Jen Ko³

¹Department of Physical Education, National Taiwan University of Sport, Taichung, Taiwan.

Sports biomechanics

|August 30, 2024

概括

慢性脚不稳定 (CAI) 的运动员在具有挑战性的任务中表现出改变的着陆机制和减少的肌肉激活. 分裂的注意力加剧了这些问题,模仿跳时的受伤风险.

科学领域:

生物力学生物力学
运动医学运动医学
神经肌肉控制控制神经肌肉控制

背景情况:

慢性脚不稳定性 (CAI) 在运动员中很普遍,往往导致下肢生物力学变化.
了解CAI如何影响着陆机制,特别是在认知负载下,对于预防伤害至关重要.

研究的目的:

调查CAI运动员在跳跃跳跃着陆期间分分注意力对下肢机械的影响.
在CAI运动员中确定分分注意力 (DA) 和非分分注意力 (NDA) 条件之间的特定动力学和动力学差异.

主要方法:

在DA和NDA条件下,30名具有CAI的NCAA Division I运动员在DA和NDA条件下进行跳跃跳跃着陆.
动力学和动力学数据被采集和分析,使用配对的t测试来比较两个条件.
评估了直骨 femoris 的神经肌肉活动.

主要成果:

患有CAI的运动员在DA任务中表现出更高的垂直着陆力,更高的脚逆转速度,以及在正面和横向平面上更大的关节运动范围 (脚,膝盖,部).
在CAI运动员中观察到直骨 Femoris 肌肉的神经肌肉准备不足.
在DA条件下,在脚,膝盖和部观察到明显的运动变化.

结论:

患有CAI的运动员表现出动态姿势稳定性受损,这是由于腿直肠激活率下降,特别是在注意力分散的情况下.
这些发现表明,在跳跃着陆过程中注意力分散会复制CAI相关的损伤机制.
这些结果提供了对CAI运动员面临的实时生物力学挑战的关键见解.

关键词:

登陆着陆时间双关节肌肉的肌肉是双关节肌肉.伤害机制伤害机制伤害机制肌肉激活肌肉激活

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