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关节中间部的激活时间与单脚着陆期间的膝盖绑架角度有关
Daido Miyamoto1, Akira Saito2, Minoru Kimoto2
1Department of Rehabilitation Medicine, Akita University Hospital, Akita, Japan.
在女性运动员单腿着陆时,膝盖绑架角度更大,与更快的关节中部激活有关. 这一发现强调了快速肌肉反应对膝盖动态稳定的重要性.
科学领域:
- 生物力学 生物力学
- 运动医学 运动医学
- 发动机控制器的控制器
背景情况:
- 在单脚着陆时,膝盖绑架角度 (KAA) 是评估下肢生物力学和受伤风险的关键因素.
- 部中部 (Gmed) 在动态运动期间在稳定部和控制膝盖中发挥着至关重要的作用.
- 了解Gmed激活时间和KAA之间的关系对于制定有针对性的伤害预防策略至关重要.
研究的目的:
- 为了研究单脚着陆时膝盖绑架角度 (KAA) 与部绑架强度的时间参数之间的关联.
- 为了检查KAA和Gmed肌肉激活速度在动态着陆期间之间的关系.
- 为了确定在大学女运动员的单腿着陆期间增加KAA的预测因素.
主要方法:
- 3D运动分析系统被用来收集49名大学女运动员在单腿着陆期间的动力学数据.
- 异动力学测量测量了部绑架峰值扭矩,而电肌学 (EMG) 评估了Gmed活动.
- 计算了Gmed在不同时间窗口 (30,50,75毫秒) 中激活的EMG上升率 (RER);进行了相关性和回归分析.
主要成果:
- 在不同的时间窗口 (RER30,RER50,RER75) 中观察到KAA和Gmed的RER之间的正相关性.
- 逐步多重回归确定了部内部旋转角度和RER50作为KAA的重要预测因素.
- 更快的Gmed激活,由更高的RER50表示,与降落期间膝盖绑架角度更大有关.
结论:
- 在女性运动员单腿着陆时膝盖绑架角度增加与延迟或更慢的关节中间激活有关.
- 快速激活关节介质是控制膝关节对齐的关键因素,并可能减少动态任务期间受伤的风险.
- 这些发现强调了评估肌肉激活时间与动力学参数结合用于全面生物力学分析的重要性.
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