最大的同位体干部任务是否会产生最大的背大脑的最大活动?
Declan Price1, Karen A Ginn2, Mark Halaki2
1School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Australia.
概括
伸展肩膀的任务,而不是干的任务,引起最大的腰活动. 这一发现对于背部肌肉研究中精确的电肌图 (EMG) 数据正常化至关重要.
科学领域:
- 生物力学 生物力学
- 人类运动科学科学 人类运动科学
- 运动生理学 运动生理学
背景情况:
- 电肌图 (EMG) 研究通常在干部运动期间调查大背活动.
- 之前的研究表明,在干部任务中,背大的激活率很高,这表明它对稳定性和运动的重要性.
- 在EMG研究中不一致的规范化方法,使用肩部或干部任务,对准确的解释构成挑战.
研究的目的:
- 为了比较常用的肩膀和干部正常化任务.
- 为了确定干部任务是否会引起大背肌的最大活动.
- 评估规范化方法对理解大背功能的影响.
主要方法:
- 十名健康的参与者执行了最大的同位体干部和肩膀任务.
- 电肌图 (EMG) 信号从背脊部使用表面和内置电极记录下来.
- 处理EMG数据以获得线性信封,并比较跨任务的最大活动水平.
主要成果:
- 与所有其他测试的肩膀和干部任务相比,肩膀伸展任务产生了显著更高的斜背脊活动水平 (超过1.5倍).
- 这一结果在表面和内置电极记录中一致.
- 最大的同位体干部任务没有产生最大的极背部激活.
结论:
- 最大的同位体干部任务不足以使拉提西木斯背部电肌图 (EMG) 数据正常化.
- 使用干部任务进行正常化可能会导致过度估计大背对干部运动的贡献.
- 伸展肩膀是一个更有效的任务,以引起最大的斜背背部活动,以实现EMG正常化.
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