伸展速度和唤起状态对被动脚关节机械学的影响
Camila de Paula de Lima1,2, Cassio Victora Ruas1,2, Anthony John Blazevich2
1University of Campinas, Campinas, Brazil.
Scandinavian journal of medicine & science in sports
|December 6, 2024
概括
较快的拉伸速度增加了最大的被动关节运动范围,尽管肌肉度和活动更高. 兴奋状态对健康个体的运动范围没有显著影响.
科学领域:
- 生物力学 生物力学
- 运动生理学 运动生理学
背景情况:
- 有限的研究客观地评估了拉伸速度和唤起如何影响最大被动关节运动范围 (ROMmax) 和性.
- 了解这些因素对于优化灵活性和伤害预防策略至关重要.
研究的目的:
- 研究不同拉伸速度和兴奋状态对健康个体的ROMmax,关节硬和肌肉电肌图 (EMG) 活动的影响.
- 具体来说,在脚的背部屈曲过程中检查中腹肌和足底肌.
主要方法:
- 14名健康的参与者接受了熟悉和实验性会议,使用异动力学动力计进行足部 flexor 伸展.
- 在三种随机激发条件下,以快速 (30°/s) 和慢速 (5°/s) 的速度进行拉伸:控制,激发音乐和放松音乐.
- 测量包括背部屈曲ROMmax,脚关节硬,肌肉EMG活动,心率和感知唤醒.
主要成果:
- 在快速拉伸 (69.1°) 和慢速拉伸 (64.9°) 之间,最大的被动运动范围 (ROMmax) 显著增加.
- 脚关节硬和肌肉EMG活动在更快的拉伸速度时更高.
- 虽然兴奋状态没有影响ROMmax,但它在更快的拉伸过程中影响了刚性,而兴奋状态显示了更高的度百分比.
- 在唤起音乐的条件下,对兴奋的感知显著更高.
结论:
- 更快的被动拉伸速度导致更大的最大关节运动范围,即使增加了肌肉硬和反射活动.
- 通过音乐调节的兴奋状态并没有显著改变ROMmax,但在更快的拉伸过程中对关节硬有很小的影响.
- 这些发现挑战了以前的假设,并突出了伸展动力学,肌肉反应和关节运动之间的复杂相互作用.
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