在耐力运动员的最大自行车运动期间,臭氧暴露会限制心肺功能
Owen D Harris1, Patric E O Gonçalves1, Andy Hung1
1School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada.
Journal of applied physiology (Bethesda, Md. : 1985)
|April 25, 2024
概括
暴露于高地平面臭氧 (O3) 在最大运动期间显著损害训练有素运动员的氧气吸收和通风. 这表明臭氧污染限制了氧气运输,影响了运动表现,特别是在更高的强度下.
科学领域:
- 环境健康 环境健康
- 运动生理学 运动生理学
- 肺部医学 肺部医学
背景情况:
- 地表臭氧 (O3) 是一种主要的空气污染物,已知会引起呼吸系统问题.
- 臭氧暴露对运动表现的影响,特别是在高体力劳动期间,仍然不完全理解.
- 运动涉及呼吸过敏 (增加呼吸),这可能会改变吸入污染物的影响.
研究的目的:
- 为了调查高峰现实世界臭氧水平是否会降低训练有素的运动员的肺功能和运动能力.
- 为了确定与清洁空气相比,臭氧暴露是否会增加运动期间症状的发展.
- 测试臭氧暴露对炼表现产生负面影响的假设.
主要方法:
- 一个双盲,随机交叉试验,涉及20名有氧训练参与者.
- 参与者在两个条件下进行了运动试验:暴露于170ppb臭氧或室内空气 (<10ppb臭氧).
- 炼方案包括中等强度的热身,高强度的炼和耗尽时间测试.
主要成果:
- 在臭氧和室内空气条件之间的亚最大运动期间,没有观察到氧气吸收或通风的显著差异.
- 在最大限度的运动 (时间到耗尽测试) 期间,参与者在暴露于臭氧时,表现出明显较低的运动结束氧气吸收,每分钟通风和潮体积.
- 在臭氧状况中,人们注意到运动持续时间减少的趋势,这表明运动能力减少.
结论:
- 暴露于真实世界臭氧水平的峰值显著减少了氧气吸收,并改变了高度训练有素的运动员在最大限度的运动期间的通风模式.
- 在最大运动期间观察到的氧气吸收减少和呼吸模式的变化表明氧气运输受到限制.
- 臭氧剂量和运动强度的联合影响可能会影响生理反应的严重程度,强调需要进一步研究缓解策略.
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