性能和感知到的疲劳性是否取决于男性疲劳的同度任务的定方案?
Dolores G Ortega1, Robert W Smith2, Jocelyn E Arnett2
1Exercise Physiology Laboratory, Department of Nutrition and Health Sciences, University of Nebraska - Lincoln, Lincoln, NE, USA - dortega6@huskers.unl.edu.
The Journal of sports medicine and physical fitness
|March 4, 2024
概括
用于调节运动强度的定方案影响了任务失败时间和神经肌肉反应,但不是整体性能疲劳. 这表明不同的疲劳机制,这取决于运动是否与感知力或扭矩挂.
科学领域:
- 运动生理学 运动生理学
- 神经肌肉生理学 神经肌肉生理学
- 运动科学 运动科学 运动科学
背景情况:
- 感知劳动力 (RPE) 的评级被用来调节运动强度.
- 了解不同定方案对练习结果的影响对于有效的培训至关重要.
研究的目的:
- 为了研究定运动强度与RPE对抗扭矩对性能疲劳性的影响.
- 为了检查这些定方案在疲劳的前臂曲任务期间对神经肌肉反应的影响.
主要方法:
- 十二名男子进行了对称前臂曲到失败,固定在RPE=6 (RPEFT) 或对应RPE=6 (TRQFT) 的扭矩上.
- 在任务前和之后测量了最大自发同度收缩 (MVIC),以评估电肌图 (EMG) 和机械图 (MMG) 信号的变化.
- 计算神经肌肉效率 (NME),并使用重复测量ANOVA来比较性能疲劳性和神经肌肉参数.
主要成果:
- 在RPEFT中,与TRQFT相比,任务失败的时间更长.
- 无论是RPEFT还是TRQFT,都导致MVIC和NME的下降,在计划之间没有显著差异.
- 在TRQFT之后,正常化的EMG平均功率频率下降,而正常化的MMG平均功率频率在RPEFT后增加.
结论:
- 观察到方案特定的神经肌肉反应和任务失败的时间,尽管整体表现疲劳性相似.
- 在TRQFT之后的疲劳主要是外围的,而在RPEFT之后的疲劳涉及外围和中央机制.
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