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在使用多段脚模型与单段模型相比,运行时脚和脚关节的机械学
Justin C Wager1, John H Challis2
1Department of Physical Therapy and Human Movement Science, Sacred Heart University, Fairfield, Connecticut, United States of America.
PloS one
|February 13, 2024
概括
在跑步中比较脚模型显示,多段脚模型提供了比单段模型更准确的脚关节机制.
科学领域:
- 生物力学 生物力学
- 人类运动分析 人类运动分析
- 体育科学 运动科学 运动科学
背景情况:
- 传统的生物机械模型通常将脚简化为一个单一的刚性段.
- 这种简化可能会导致在像跑步这样的动态活动中分析脚关节功能的不准确性.
- 之前使用多段脚模型在行走中的研究表明动力学和动力学计算中的潜在错误.
研究的目的:
- 通过使用多段脚模型 (MULTI) 与传统单段脚模型 (SINGLE) 进行跑步姿势阶段的脚关节机制比较.
- 为了评估从这两种建模方法中得出的脚关节动力学和运动学的差异.
主要方法:
- 七名参与者以控制速度 (3.1米/秒) 跑步.
- 标记器在腿部和脚部的位置,以及地面反应力量被捕获.
- 脚关节动力学,时刻,工作和功率均使用SINGLE和MULTI模型进行计算,并使用统计参数映射分析差异.
主要成果:
- 多段脚模型 (MULTI) 与单段模型 (SINGLE) 相比,使脚关节的角度更接近中性和角速度降低.
- 在MULTI模型中观察到瞬间联合功率和晚期姿势期间联合工作的显著减少 (p<0.001).
- 统计参数映射证实了两种模型在立场阶段之间存在显著差异.
结论:
- 将脚视为从脚到甲足关节的单一刚性段,导致在跑步时对脚关节动力学和运动学的估计不准确.
- 脚模型的拓学显著影响了对跑步者的脚关节力学分析.
- 这些发现对于理解脚关节在跑步复杂动态中的特定作用具有关键意义.
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