升高的湿度会影响蒸发热量损失和在高温环境下自动节奏的运动表现
Felicity M Bright1,2, Brad Clark1, Ollie Jay2
1Research Institute for Sport and Exercise, University of Canberra, Canberra, Australia.
Scandinavian journal of medicine & science in sports
|March 19, 2025
概括
高湿度显著降低了身体在运动期间散热的能力. 这增加了热应变,并在炎热的条件下损害了骑自行车的性能.
科学领域:
- 环境生理学环境生理学
- 运动科学 运动科学
- 热调节 热调节 热调节
背景情况:
- 散热对于在运动期间保持热平衡至关重要.
- 高湿度会损害身体的主要冷却机制,即汗水蒸发.
- 了解湿度的影响对于运动员和热带气候中的公共健康至关重要.
研究的目的:
- 研究不同绝对湿度水平对散热的影响.
- 为了评估随后的热,心血管和性能响应在热的自我节奏炼期间.
- 量化湿度,蒸发能力和运动结果之间的关系.
主要方法:
- 十二名训练有素的男性骑自行车者在33°C的温度下,在四个湿度水平 (1.6,2.5,3.5和4.5kPa) 中完成了700kJ的计时赛.
- 测量包括部分水蒸气压力梯度,最大蒸发能力 (Emax),出汗效率 (Seff),功率输出,核心温度和皮肤温度.
- 进行了统计分析,以确定湿度条件之间的显著差异.
主要成果:
- 增加湿度显著降低了汗水蒸发的梯度,最大蒸发容量 (Emax) 和出汗效率 (Seff).
- 在高湿度和非常高湿度条件下,输出功率明显低于低湿度和中等湿度条件.
- 在非常高的湿度下,核心温度的峰值显著更高,而皮肤温度的平均值则随着湿度升高而增加.
结论:
- 由于湿度升高,蒸发潜力和效率的降低加剧了热和心血管应变.
- 这些生理变化导致在炎热的环境中自行骑自行车表现的显著损害.
- 湿度是一个关键的环境因素,影响运动能力和在炎热的安全性.
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