立即载荷可以提高核心温度,但不能提高皮肤温度,当在温和冷空气中穿着湿衣时
Phillip O Bodurtha1,2, MariaLena A Shaw1,2, Andrew M Greenfield1
1Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Natick, MA.
Wilderness & environmental medicine
|September 24, 2025
概括
与静态或延迟摇相比,即时摇 (IR) 有效地提高了身体深部的温度,并改善了湿冷条件下的热舒适度. 然而,与静态姿势相比,IR并不能显著改善皮肤温度,特别是手指,而不是静态姿势.
科学领域:
- 环境生理学环境生理学
- 军事医学 军事医学
- 人类表现的人类表现.
背景情况:
- 军事人员面临极端寒冷和潮湿的条件,有可能出现低温.
- 在寒冷的环境中,服装和带来了重大的生理挑战.
- 了解对湿冷暴露的最佳反应对于士兵的安全和性能至关重要.
研究的目的:
- 为了比较立即冲动 (IR) 与静态或延迟冲动 (DR) 对核心体温,皮肤温度和湿冷条件下的热舒适度的影响.
- 为了确定即时的身体劳动是否优于休息或延迟的劳动,当湿在寒冷中.
- 为军事行动中管理热应力提供基于证据的建议.
主要方法:
- 十一个健康的成年人被浸泡在温水中后暴露在寒冷的环境中 (5.3°C).
- 参与者进行了即时摇 (IR),静态站立 (静态) 或延迟摇 (DR) 60分钟.
- 不断监测直肠温度 (Tre),皮肤温度和热舒适度.
主要成果:
- 与静态和延迟的动相比,在60分钟的暴露期间,即时动 (IR) 显著提高了直肠温度 (Tre).
- 与静态和DR条件相比,IR导致了更好的热感觉等级.
- 与静态条件相比,IR没有提供优越的皮肤温度维护,特别是指部温度.
结论:
- 立即动是一种有效的策略,可以保持核心体温,并在湿冷的环境中增强热感知.
- 虽然对核心温度有好处,但与静态休息相比,即时摇对外围皮肤温度的影响是有限的.
- 研究结果表明,当在寒冷中湿时开始运动时,核心升温和外围降温之间存在权衡.
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