疲劳对腰部肌肉活动空间分布的任务依赖性影响
Emile Marineau-Bélanger1, Martin Vaurs2, Justin Roy3
1Département d'Anatomie, Université du Québec à Trois-Rivières, 3351 Boul. des Forges, Trois-Rivières, Qc, G8Z 4M3, Canada; Groupe de Recherche sur les Affections Neuromusculosquelettiques, GRAN, Canada.
概括
这项研究表明,腰部肌肉活动随着干部伸展炼的疲劳而横向转移. 肌肉招募策略在疲劳之前以不同的方式适应,但随着耐力任务的进展而趋同.
科学领域:
- 生物力学 生物力学
- 运动学 运动学
- 运动生理学 运动生理学
背景情况:
- 肌肉疲劳会改变神经肌肉控制策略.
- 了解空间肌肉激活模式对于伤害预防和康复至关重要.
- 干部延伸耐力任务通常用于研究腰部肌肉疲劳.
研究的目的:
- 为了研究不同的干部延伸疲劳任务如何调节腰部肌肉活动的空间分布.
- 为了比较修改后的索伦森测试和反向修改后的索伦森测试对腰部肌肉激活模式的影响.
- 确定肌肉招募策略是否随着时间的推移而变化,并在任务之间有所不同.
主要方法:
- 20名健康的成年人完成了两项异比体型的干延伸耐力任务,直到疲.
- 高密度电肌图记录了双边表面腰部肌肉活动.
- 使用心脏坐标 (中侧和尾) 和重复测量ANOVA分析了空间分布.
主要成果:
- 在疲劳任务期间,肌肉激活中心体的显著横向转移发生在两侧,没有特定任务的差异.
- 头骨-尾部心状位置显示出显著的任务 × 时间相互作用,最初在修改后的索伦森测试中出现了更多的尾部转移.
- 这些发现表明,在疲劳前阶段的任务依赖空间调制.
结论:
- 腰部肌肉的空间激活模式受到特定的疲劳任务的影响,特别是在显著的疲劳开始之前.
- 随着疲劳的进展,在不同的任务中采用类似的招聘策略来维持绩效.
- 这表明适应性神经肌肉反应持续的努力在腰部肌肉.
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