疲劳的运动减少了细胞的被动Young的模块在人体巨大的横向肌肉
Grace E Privett1, Austin W Ricci1, Larry L David2
1Department of Human Physiology, University of Oregon, Eugene, Oregon, USA.
Experimental physiology
|August 20, 2024
概括
急性疲劳性运动会降低男性的细胞肌肉度,但不能降低女性的细胞肌肉度,这与提丁蛋白酸化的变化有关. 这种取决于性别的效应提供了对受伤风险和肌肉机制的洞察.
科学领域:
- 骨肌肉生理学 骨肌肉生理学
- 运动科学 运动科学
- 生物化学 生物化学
背景情况:
- 已知急性疲劳性运动可以减少整个肌肉的硬度.
- 这种反应的潜在细胞机制和潜在的性别差异尚未得到充分理解.
- 减少肌肉度可能会增加受伤风险并影响表现.
研究的目的:
- 为了研究负责疲劳性运动后减少肌肉硬性的细胞内机制.
- 为了确定这些影响是否在细胞水平上在男性和女性之间有所不同.
- 检查提丁酸化在调解肌肉度变化的作用.
主要方法:
- 从健康的男性和女性获得肌肉活检,后最大自愿膝盖延伸到任务失败.
- 用机械拉伸测量肌肉纤维的细胞被动阳模.
- 使用质谱分析分析了提丁酸化.
主要成果:
- 从男性的疲劳肌肉纤维中观察到被动的模量显著减少,但不是女性.
- 疲劳性运动改变了在多重血清残留物中提丁的酸化状态,特别是在其弹性区域内.
- 在疲劳后的活跃张力或瘤超结构中没有发现显著的变化.
结论:
- 急性疲劳会导致骨肌肉细胞度的性别依赖性降低,主要在男性身上.
- 改变的提丁酸化是一种关键的细胞内机制,有助于疲劳诱导的肌肉服从性变化.
- 这些发现提供了关于软组织损伤风险和肌肉功能的性别特异性的机制性见解.
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