凝聚热适应对热生理学适应,低氧交叉耐受性,运动性能和脱适应的影响
Charlotte E Stevens1,2, Joseph T Costello1, Michael J Tipton1
1Extreme Environments Laboratory, School of Psychology, Sport and Health Sciences, University of Portsmouth, Portsmouth, United Kingdom.
Journal of applied physiology (Bethesda, Md. : 1985)
|January 17, 2025
概括
在热剂量方面,冷凝热适应 (CHA) 与传统热适应 (THA) 相匹配,并引起了类似的适应. 这种新的CHA方法为为热环境做准备的时间有限的个人提供了一个可行的选择.
科学领域:
- 运动生理学 运动生理学
- 环境生理学环境生理学
- 人类的适应能力
背景情况:
- 短时间的热适应 (HA) 可能会导致由于较低的累积热剂量而导致不完全的适应.
- 目前尚不清楚,在更短的时间内匹配热剂量是否可以在更长时间的HA干预中产生类似的适应.
研究的目的:
- 为了比较冷凝热适应 (CHA) 程序与传统热适应 (THA) 程序在引起热生理学适应方面的有效性.
- 要确定在较短的时间范围内匹配热剂量是否可以产生类似的适应性反应,以更长的干预.
主要方法:
- 一个平行组设计,比较CHA (4x75分钟/天2天) 与THA (1x75分钟/天8天) 在年轻的男性.
- 参与者接受了热暴露,目标直肠温度为38.5°C.
- 在干预前和后评估了对运动热应激,缺氧和正常运动表现的生理反应.
主要成果:
- 在干预过程中,CHA和THA都表现出类似的热和心血管应变,表明相当的热剂量.
- CHA诱导了与THA相似的热生理学适应,包括减少热和心血管应变,血液和血体积膨胀,以及改善感知指数.
- 然而,与THA相比,CHA显示出更大的初始生理压力 (炎症,胃肠道透性,压力) 和较小的休息热应变和出汗率的改善.
结论:
- 凝聚热适应 (CHA) 可以引起与传统热适应 (THA) 相比的显著热生理适应,当热剂量相匹配时.
- 累积的热剂量是适应热量的关键因素,使得CHA成为准备热环境的个人潜在的时间效率战略.
- 对于时间有限的人群,如军人,消防员和运动员,CHA可能是一个可行的选择,适应性至少维持22天.
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