拉伸对机电延迟组件的影响的协同效应差异
Nicholas Toninelli1, Giuseppe Coratella1, Stefano Longo1
1Department of Biomedical Sciences for Health (SCIBIS), Università degli Studi di Milano, Milan, Italy.
PloS one
|March 26, 2024
概括
脚 flexors的被动拉伸不同影响协同肌肉. 胃半中和侧在伸展后的电机延迟 (EMD) 和放松EMD (R-EMD) 中显示出较大的变化,与伸展后的相比.
科学领域:
- 生物力学 生物力学
- 人体生理学 人体生理学
- 运动科学 运动科学
背景情况:
- 机电延迟 (EMD) 和放松EMD (R-EMD) 对于理解肌肉功能至关重要.
- 被动拉伸是一种常见的干预措施,但其对协同肌肉的差异性影响尚未完全理解.
- 电肌图,机械图和力信号的同时测量提供了关于肌肉激活和收缩动态的全面数据.
研究的目的:
- 调查被动拉伸对EMD及其组件的影响中的协同效应差异.
- 分析拉伸对EMD和R-EMD电化学和机械方面的影响,在特定的足部 flexor 肌肉.
- 探索关节被动刚性和EMD/R-EMD参数之间的关系.
主要方法:
- 26名健康的男性接受了足部 flexors的被动拉伸.
- 电肌图,机械图和力信号被同时记录.
- 在最高最大运动点刺激过程中,在胃角肌中,侧肌肌和单肌肌的伸展前后测量了EMD,R-EMD和关节被动度.
主要成果:
- 拉伸减少了关节的被动刚性,并延长了电化学和机械EMD.
- R-EMD的机械组件在中胃和侧腹肌 (21-22%的增长) 受到的影响要大于索莱斯 (12%的增长).
- 在所有肌肉中观察到关节被动度和EMD和R-EMD的机械组件之间存在显著的负相关性.
结论:
- 脚 flexors的被动拉伸不均地影响协同肌肉,中腹肌和侧腹肌在EMD和R-EMD中表现出更大的变化.
- 这些发现强调了考虑肌肉对伸展干预的特异性反应的重要性.
- 需要进一步的研究来阐明在协同肌肉群中被动拉伸引起的机械适应.
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