在运行过程中,神经机械稳定质量中心
Bernard X W Liew1, David Rügamer2, Aleksandra V Birn-Jeffery1
1School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, Essex, United Kingdom.
Gait & posture
|December 16, 2023
概括
跑步稳定性受到腿长和角度调节的影响. 腿部长度和角度变化稳定了垂直质量中心 (COM) 位移,而水平COM调整可能涉及更高速度的肢体间变化.
科学领域:
- 生物力学 生物力学
- 人类运动科学科学 人类运动科学
- 发动机控制器的控制器
背景情况:
- 质量中心 (COM) 轨迹的稳定性对于高效运行至关重要.
- 新出现的证据表明,腿的长度和角度调节有助于COM在移动过程中的稳定性.
- 了解这些动力学参数在不同运行速度中的作用是必不可少的.
研究的目的:
- 为了研究腿的长度和角度是否稳定垂直和前后 (AP) COM位移.
- 为了确定跑步速度如何影响腿的长度和角度所提供的稳定性.
- 探索运行稳定的控制机制.
主要方法:
- 使用了一个开源跑步机运行数据集 (n=28).
- 从二维角平面数据计算腿的长度和腿的角度.
- 应用无控制多重体 (UCM) 分析来量化COM稳定 (IMA) 的运动丰度.
主要成果:
- 对于APCOM位移的运动丰度指数 (IMA_AP) 总体上是不稳定的,随着速度的增加而增加.
- 垂直COM排量 (IMA_vertical) 的动力充足指数一直稳定下来,在更高的速度时效果增加.
- 峰值破坏稳定的IMA_AP从2.5米/秒的-0.66到4.5米/秒的-1.12不等.
- 峰值稳定IMA_vertical的范围从0.69在2.5米/秒到1.18在4.5米/秒.
结论:
- 腿的长度和角度变化是稳定跑步过程中垂直COM运动的关键参数.
- 保持恒定的运行速度可能更多地取决于横向COM控制的四肢间协调.
- 简单的弹质量模型参数有效地解释了运行控制的方面.
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