热量和低氧对动态氧气吸收和脱氧血红蛋白参数的差异影响,在渐进的消耗性运动过程中
Zhizhong Geng1, Jinhao Wang2, Guohuan Cao2
1School of Sports and Health, Shanghai University of Sport, Shanghai, China.
Frontiers in physiology
|January 23, 2024
概括
热量,湿度和缺氧等环境条件会通过减少氧气吸收和增加脱氧血球蛋白来损害运动表现. 这些因素有助于运动员在艰苦的运动期间出现外周疲劳.
科学领域:
- 运动生理学 运动生理学
- 环境生理学环境生理学
- 运动科学 运动科学
背景情况:
- 外周疲劳是体育表现的一个主要限制.
- 环境压力因素显著影响运动期间的生理反应.
- 了解氧气动态对于管理运动能力至关重要.
研究的目的:
- 为了研究氧气吸收 () 和脱氧血球蛋白 (HHb) 变化和运动员的外周疲劳之间的关系.
- 为了比较这些生理反应在正常,炎热/潮湿和低氧条件下.
- 阐明不同环境中疲劳发展的机制.
主要方法:
- 12名男性现代五项运动运动员进行了渐进式消耗性炼.
- 运动是在三个环境中进行的:正常 (CON),高温/湿度 (HOT) 和低氧 (HYP).
- 测量了气体代谢,肌肉氧和度 (SmO2) 和脱氧血红蛋白 (HHb);分析了线性和非线性模型和HHb动态.
主要成果:
- 与CON相比,HOT和HYP条件都减少了运动时间,运动时间和氧气吸收效率 (OUES).
- 热气和高温气体交换值在热气和高温气体交换值较低.
- 在HOT中发生了加速脱氧 (ΔEHHb),而在HYP中观察到过度脱氧 (ΔEHHb-1),两者都与负相关.
结论:
- 运动员的低氧和热/潮湿环境会抑制气体交换和骨肌肉的氧气供应.
- 在HOT中加速肌肉脱氧和在HYP中过度脱氧是导致外周疲劳的关键因素.
- 环境条件极大地影响运动员的生理反应和疲劳机制.
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