在多步降落过程中肌肉活动
Kaitlin Kremsky1, Emma R Connolly2, Mary Kallberg1
1Human Motion Laboratory, University of Scranton, Leahy Hall, 237 Jefferson Avenue, Scranton, PA 18510, USA.
Journal of bodywork and movement therapies
|November 27, 2024
概括
楼梯下降期间的肌肉活动因步骤和策略而异. 逐步匹配和逐步下降显示了不同的肌肉激活模式,挑战了稳定状态假设,并为下肢问题提供了康复信息.
科学领域:
- 生物力学 生物力学
- 人类运动分析 人类运动分析
- 运动生理学 运动生理学
背景情况:
- 之前的研究发现了跨阶梯梯子下降的机械差异.
- 在不同的策略之间,在不同的步骤之间,在下楼过程中肌肉活动的变化仍然未被充分研究.
研究的目的:
- 为了量化肌肉活动的差异,在步骤下降.
- 为了比较肌肉活动之间的步骤和步骤匹配策略.
- 为了检查楼梯各个阶段的肌肉活动变化.
主要方法:
- 25名参与者沿着7个步骤的楼梯走下来,使用自己选择的步伐来实现一步一步的和步步匹配的策略.
- 使用双极电极在关键的下肢肌肉上记录肌肉活动 (前肢,脚,中部胃半径,直骨,两腿).
- 双向重复测量 ANOVA 分析了带头和尾肢的协同激活 (脚和膝关节) 和集成电肌图 (EMG).
主要成果:
- 楼梯下降期间的肌肉活动显著依赖于步数,无论是一步一步的还是步步匹配的策略.
- 在两种下降策略之间观察到明显的脚和膝盖联合激活模式,特别是在领先的四肢.
- 步道四肢协同激活显示了策略之间的相似性,在一步上一步和膝盖在步骤匹配中活性更高.
结论:
- 这项研究挑战了在下楼过程中"稳定状态"的假设,揭示了跨阶段和策略之间的显著肌肉活动变化.
- 在不同步骤和不同策略之间肌肉激活模式的差异对患有下肢肌肉骨疾病的个体有影响.
- 建议根据特定的楼梯长度量身定制康复,并承认研究中的台阶数量变化.
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