拉伸缩短周期效应与皮质或脊柱刺激度调节无关
Lea-Fedia Rissmann1, Brent James Raiteri1,2, Wolfgang Seiberl3
1Human Movement Science, Faculty of Sport Science, Ruhr University Bochum, Bochum, North Rhine-Westphalia, Germany.
The Journal of physiology
|June 18, 2025
概括
拉伸缩短周期 (SSC) 通过机械效应提高肌肉性能,而不是皮层或脊柱刺激能力的变化. 这项研究发现,SSC的性能增长是由活跃的拉伸机制驱动的,而不是神经调节.
科学领域:
- 神经科学是一个神经科学.
- 人体生理学 人体生理学
- 生物力学 生物力学
背景情况:
- 皮层和脊柱刺激能力对延伸缩短周期 (SSC) 性能的贡献仍然不清楚.
- 了解SSC收缩期间的神经适应对于优化运动表现和预防伤害至关重要.
研究的目的:
- 研究与纯缩短 (SHO) 收缩相比,SSC收缩缩短阶段期间和之后的皮质和脊柱刺激性调节.
- 确定神经因素是否有助于在SSC期间提高表现.
主要方法:
- 参与者进行了涉及SSC和SHO的亚最大自愿脚下曲收缩.
- 用运动唤起的潜能 (MEPs) 和宫骨髓运动唤起的潜能 (CMEPs) 来评估单体肌肉的皮层和脊柱刺激性.
- 记录了脚关节扭矩和肌电图,以分析性能和神经活动.
主要成果:
- 与SHO收缩相比,SSC的缩短过程中的平均扭矩显著增加了12%.
- 在缩短或稳定阶段的SSC和SHO收缩之间,皮层和脊柱刺激性 (MEPs和CMEPs) 并没有显著差异.
- 与固定收缩相比,SSC和SHO后平稳状态扭矩较低,这表明剩余力下降.
结论:
- 脚 flexors的SSC性能提升主要是由拉伸阶段激活的机械机制驱动的,而不是皮层或脊柱刺激能力的调节.
- 观察到的SSC效应可能是由于内在肌肉特性和伸展诱导机制,而神经驱动的变化没有显著的贡献.
- 在SSC收缩后的残余力压力并未通过前面的拉伸的机械效应减轻.
关键词:
强迫抑郁症抑郁症的力量增强强力的增强力.性能提升 性能提升 性能提升伸展反射是一种伸展反射.三叉体 surae surae 三叉体 surae 三叉体 surae 三叉体 surae 三叉体 surae更多相关视频
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