在长时间沉浸在冷水中后,有氧运动性能下降
Hayden W Hess1,2, Zachary J Schlader2, Blair D Johnson2
1University at Buffalo, Department of Exercise and Nutrition Sciences Center for Research and Education in Special Environments, Buffalo, NY 14214.
概括
四个小时的冷水浸泡会显著影响有氧运动的表现. 与沉浸后呼吸空气相比,呼吸100%的氧气不会进一步降低性能.
科学领域:
- 环境生理学环境生理学
- 运动科学 运动科学
- 人类表现的人类表现.
背景情况:
- 长时间沉浸在冷水中是一个重要的环境压力因素.
- 了解它对有氧运动的影响对于性能优化和安全至关重要.
研究的目的:
- 为了研究四小时冷水浸泡对自动节奏有氧运动表现的影响.
- 为了确定呼吸100%氧气是否与呼吸空气相比,加剧了性能下降.
主要方法:
- 九名健康成年人接受了三个试验:对照,冷水浸泡 (20.1°C) 呼吸空气 (FiO2=0.21),冷水浸泡呼吸100%氧气 (FiO2=1.0).
- 浸泡 (或控制) 后,参与者完成了60分钟的行走 (20%的体重),随后进行了5公里的自动步行跑步机计时试验.
- 在计时试验期间,监测核心温度,心率和感知劳力的评分.
主要成果:
- 与对照组 (28±4分钟) 相比,在空气 (32±5分钟) 和100%氧气 (32±6分钟) 试验中冷水浸泡后,自动步行5公里计时试验的性能显著降低.
- 在100%氧气和空气试验之间没有观察到显著的性能差异.
- 生理反应 (核心温度,心率,RPE) 在计时试验期间增加,但在实验条件之间没有差异.
结论:
- 四个小时的冷水浸泡会减弱自我节奏的有氧运动表现.
- 与呼吸空气相比,在长时间浸泡在冷水中后,呼吸100%的氧气不会进一步损害性能.
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