干部延伸肌长度的间歇性变化可以延迟肌肉疲劳的发展吗?
Niels P Brouwer1, Idsart Kingma1, Wietse van Dijk2
1Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, the Netherlands.
Journal of biomechanics
|December 4, 2023
概括
间歇性干部肌肉长度变化显著延迟疲劳在长时间的静态曲相比同度或自愿变化. 这种姿势干预通过促进交替活动来增强肌肉耐力.
科学领域:
- 生物力学和人体工程学
- 运动生理学 运动生理学
- 肌肉骨研究 研究
背景情况:
- 长时间静止的姿势会导致肌肉疲劳和疼痛.
- 肌肉长度的变化可以通过交替肌肉活动来减轻疲劳.
- 了解减少干部延伸器疲劳的干预措施对于预防肌肉骨疾病至关重要.
研究的目的:
- 为了评估间歇性干部延伸肌肉长度变化 (间歇性) 在长时间静态曲期间延迟疲劳.
- 为了比较间歇条件与近同度 (ISOMETRIC) 和自愿变化 (VOLUNTARY) 条件.
- 评估姿势干预措施减少肌肉疲劳的有效性.
主要方法:
- 十一个健康的男性参与者在30度的干部倾斜下进行了长时间的静态曲,直到筋疲力尽.
- 测试了三种条件:间歇性,同度性和自愿性.
- 传统和高密度电肌图 (convEMG和HDsEMG) 测量了干部伸展肌肉活动.
主要成果:
- 与ISOMETRIC相比,INTERMITTENT的耐力时间长了33.6% (p=0.027) 和INTERMITTENT的耐力时间长了29.4%. 志愿服务 (p=0.010). 志愿服务 (p=0.010). 志愿服务 (p=0.010). 志愿服务 (p=0.010).
- 在ISOMETRIC和VOLUNTARY条件之间没有发现耐力时间的显著差异.
- 在INTERMITTENT条件下观察到EMG振幅 (convEMG和HDsEMG) 的更高变化,表明轮流的肌肉活动.
结论:
- 强加的间歇性干部扩展器肌肉长度变化有效地延迟长时间静态曲期间的肌肉疲劳.
- 这种干预措施优于近同位数和自愿肌肉长度变化,以提高耐力.
- 肌肉活动的交替,可能被HDsEMG检测到,是减少疲劳的关键机制.
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