在不同肌肉长度的肘部曲练习后,双臂臂区域剪切模块
Amanda de Oliveira Silva1, Maria Clara Albuquerque Brandão1, Thiago Torres da Matta2
1Universidade Federal do Rio de Janeiro, Programa de Engenharia Biomédica (PEB-UFRJ) - Cidade Universitária, Rio de Janeiro, Brazil.
Journal of biomechanics
|December 12, 2025
概括
这项研究表明,双臂肌肉度在运动后区域性变化,特别是在肩部伸展期间的远端长头. 这些发现突出了潜在的肌肉损伤风险,并为运动处方提供了信息.
科学领域:
- 生物力学 生物力学
- 肌肉生理学 肌肉生理学
- 运动科学 运动科学 运动科学
背景情况:
- 双臂肌 (BB) 是一个双关节肌肉,在炼过程中容易发生长度变化.
- 在肩部伸展期间增加的被动张力可能会损害力量的产生,并增加受伤的风险,特别是在离散收缩期间的远部BB.
研究的目的:
- 通过剪波弹性学研究BB剪模 (刚度) 的区域变化.
- 为了检查这些变化在不同的肩膀位置 (曲,中性,延伸) 在肘部曲练习之前和之后.
主要方法:
- 18名经过抵抗训练的雄性在三个肩部位置进行了肘部曲练习,达到他们一次重复的最大功率的80%.
- 剪波弹性学测量了运动前和运动后长和短BB头的近距离和远距离区域的剪模量 (μ).
- 统计分析包括三向重复测量MANOVA和K-means集群,以确定个体反应模式.
主要成果:
- 关节位置显著影响了肌肉长度和运动前的BB剪模,从肩膀曲增加到伸展.
- 个体反应异质,特别强调BB的远端长头.
- 在远端长头78.6%的受试者观察到剪切模块的减少,这表明了特定区域的机械反应.
结论:
- 运动后BB度的减少表明了特定区域的机械反应,可能与肌肉损伤有关,特别是在肩部伸展期间的远端长头.
- 剪波弹性学有效地检测到BB度的变化,支持其在训练和康复中使用.
- 建议在规定长肌长度的重运动时谨慎行事,特别是对于未经训练的人来说,由于机械应力升高.
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