跨不同跑步速度稳定脚高度的多关节协同作用:一种不受控制的多重分析
Mateus S Dias1, Sandra M S F Freitas2, Paulo B de Freitas1
1Universidade Cruzeiro do Sul.
Research quarterly for exercise and sport
|April 10, 2025
概括
跑步者使用多关节协调来稳定跑步时的脚高度. 这种运行协同作用在更快的速度和摇摆阶段结束时加强,以确保安全着陆.
科学领域:
- 生物力学 生物力学
- 发动机控制器的控制器
- 人类运动科学科学 人类运动科学
背景情况:
- 跑步机上跑步涉及复杂的多关节协调.
- 脚高度稳定对于安全高效的运动至关重要.
- 无控制式集流体 (UCM) 框架提供了对电机冗余和协同效应的见解.
研究的目的:
- 为了研究多关节协同作用,在跑步机上运行时稳定脚高度.
- 确定这些协同效应是否取决于行驶速度.
- 分析脚高度稳定在摇摆阶段的时间特征.
主要方法:
- 采用了不受控制的集群 (UCM) 框架.
- 收集了28名经验丰富的跑步者的动力学数据,以2.5米/秒,3.5米/秒和4.5米/秒的速度跑.
- 在横跨摇摆阶段的关节空间 (V_u,V_e) 和协同效应指数 (ΔV_z) 的计算方差.
主要成果:
- 显著的多关节协同作用 (ΔV_z > 0) 存在,稳定了脚高度.
- 在摇摆阶段,协同效应的强度各不相同,达到81-100%的峰值.
- 较慢的运行速度导致在摇摆阶段后半段的协同效应较低.
结论:
- 中枢神经系统积极组织多关节协同作用,以稳定脚高度.
- 协同作用在摇摆阶段结束时最强,确保安全的脚部位置.
- 更快的运行速度增强了这种稳定协同作用,提高了适应能力.
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