暂停策略对横向扰动后平衡恢复的影响
Linjing Jiang1, Satoshi Kasahara2, Tomoya Ishida2
1Department of Rehabilitation Science, Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan.
Human movement science
|February 8, 2024
概括
悬浮策略,使用膝盖曲,在横向障碍时有助于姿势控制. 轻微曲膝盖可以增强稳定性,但过度曲会导致不稳定性,影响防摔.
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
- 运动学和动力学.
背景情况:
- 姿势稳定对于日常活动和预防跌倒至关重要.
- 悬浮策略的作用,涉及膝盖曲,在突然的横向扰动期间的姿势控制中,尚未完全理解.
研究的目的:
- 调查悬浮策略在突然侧向扰动期间对姿势调整的贡献.
- 确定最佳的膝盖曲角度,以最大限度地提高悬浮策略在维持姿势控制方面的有效性.
主要方法:
- 18名健康成年人在不同速度 (7,15,20厘米/秒) 的横向扰动中进行了动力学数据收集.
- 使用运动捕捉技术测试了三种膝盖曲条件 (0°,15°,65°).
- 使用质量中心 (COM) 时间参数评估姿势调整:反应时间,峰值位移/时间,逆转时间和最小稳定率 (最小-MOS).
主要成果:
- 增加膝盖曲角度降低了重心高度 (COM).
- 在65°的膝盖屈曲时,COM反应时间在低/中速时延迟;在65°的反转时间在所有速度中都更短.
- 在65°膝曲的高速扰动下,最小稳定率 (最小-MOS) 降低了.
结论:
- 在悬浮策略中轻微曲膝盖,可以在突然的侧向扰动时提高稳定性.
- 膝盖过度曲 (65°) 可以损害姿势稳定性,可能增加跌倒风险.
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