在两次最大偏心收缩后,膝盖伸展肌肉的轻度至中度损伤会积累起来
Titouan Morin1, Robin Souron1, Ines Boulaouche1
1Laboratory Movement, Interactions, Performance, MIP (UR 4334), Nantes Université, 25 Bis Boulevard Guy Mollet, BP 72206, 44322, Nantes Cedex 3, France.
European journal of applied physiology
|June 23, 2023
概括
在24小时内重复最大偏心收缩会导致额外的膝盖延伸肌损伤. 这项研究表明,即使存在轻度至中度损伤,第二次发作也会显著增加力量损失和肌肉硬.
科学领域:
- 运动生理学 运动生理学
- 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:
- 众所周知,古怪的收缩会导致肌肉损伤.
- 不过,反复进行异常运动对肌肉损伤积累的影响还没有完全被理解.
- 了解肌肉损伤对重复炼的反应对于训练和恢复协议至关重要.
研究的目的:
- 为了调查在连续两天内发生两次最大异常收缩后,轻度到中度的肌肉损伤是否会在膝盖延伸器中积累.
- 量化第二次奇特运动引起的额外肌肉损伤.
主要方法:
- 30名参与者进行了初始最大偏心收缩 (ECC1).
- 参与者被分为一个实验 (EXP) 组,在24小时后重复发作 (ECC2) 和一个控制 (CON) 组.
- 测量了肌肉损伤的间接标志物,包括力量损失,疼痛和剪切模量.
主要成果:
- 在两天后,EXP组的强度赤字明显高 (-14.5%),相比于CON组 (-6.6%).
- 虽然这两组在ECC1后都显示出剪切模量增加,但EXP组在ECC2.2后显示出进一步显著增加.
- 这些结果表明EXP组中发生了额外的肌肉损伤,尽管先前存在轻度至中度损伤.
结论:
- 在24小时间隔的两个最大偏心收缩的重复引发额外的肌肉损伤.
- 间接标记表明,即使已经存在轻度至中度损伤,膝盖延伸器也容易受到进一步损伤.
- 这一发现对培训计划和恢复策略有影响,以防止过度训练和受伤.
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