低氧影响神经肌肉功能比热量更大,在增量测试到疲劳后
Zhizhong Geng1, Jinhao Wang2, Guohuan Cao2
1Graduate school, Shanghai University of Sport School of Exercise and Health, Shanghai, China.
International journal of sports medicine
|July 1, 2025
概括
缺氧会损害运动表现和神经肌肉功能,而热应激会增加炎症,而不会影响耐力运动员的神经肌肉功能. 这两种情况都会降低运动能力.
科学领域:
- 运动生理学 运动生理学
- 环境压力因素环境压力因素
- 运动科学 运动科学 运动科学
背景情况:
- 众所周知,热应激和缺氧会对运动表现产生负面影响.
- 这些环境条件可能导致炎症,肌肉损伤和神经肌肉功能受损.
- 了解缺氧和热应激的不同影响对于优化运动训练和表现至关重要.
研究的目的:
- 调查缺氧和热应激对耐力运动员表现和神经肌肉功能的单独和联合影响.
- 在特定的运动测试中分析生理反应,包括血液生物标志物和表面电肌图 (sEMG).
- 为了区分缺氧与热应激对炎症和神经肌肉控制的影响.
主要方法:
- 15名耐力运动员在正常 (CON),低氧 (HYP) 和热湿 (HOT) 条件下完成了增加负载测试.
- 运动前和运动后的评估包括血液生物标志物 (肌酸激酶,乳酸脱酶,瘤亡因子-α,介质素-6),性能指标,以及反运动跳跃 (CMJ) 和同位体中拉动 (IMTP) 期间的sEMG.
主要成果:
- 在HYP和HOT条件下,与CON相比,耗尽的时间减少了.
- 在CON和HYP下,CMJ性能和IMTP力下降,在HYP下观察到sEMG (RMS和MPF) 的显著降低.
- 热的条件导致白内素-6的增加,而HYP导致瘤亡因子-α的减少,在热的条件下,sEMG或动态标记物没有显著变化.
结论:
- 缺氧显著损害神经肌肉功能,抑制炎症,减少运动能力.
- 热应激会诱导炎症 (增加IL-6),但似乎不会导致显著的神经肌肉缺陷或改变性能标志物,像缺氧一样严重.
- 运动员在缺氧和热应激的情况下都会经历运动能力的降低,但通过不同的生理途径.
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