热应激增加了碳水化合物氧化率和氧气吸收在长时间的载荷运动运动期间
Paul Rosbrook1, Daniel Sweet1, JianBo Qiao1
1Center for Research & Education in Special Environments, University at Buffalo, Buffalo, USA.
Temperature (Austin, Tex.)
|June 7, 2024
概括
在炎热的天气下,军事货运增加了生理应变和碳水化合物氧化,影响了燃料供应策略. 严重的炼间隔不会影响后续在行走时的基板使用.
科学领域:
- 运动生理学 运动生理学
- 环境生理学环境生理学
- 军事营养 军事营养
背景情况:
- 军事任务往往发生在炎热的环境中,需要士兵执行艰苦的活动,如负载行走.
- 了解代谢需求,特别是碳水化合物氧化,对于优化在这些条件下加油和恢复策略至关重要.
研究的目的:
- 调查热量和运动强度对军事载荷运输期间生理反应和基板利用的影响.
- 为了确定是否严重的劳动间隔影响后续负载行走在不同的热条件下的基质氧化.
主要方法:
- 十名男性在温和 (20°C/40%RH) 或热 (37°C/20%RH) 条件下进行了90分钟的军事载荷运输 (30%体重).
- 运动方案包括在第一个通风门处持续步行 (CW) 或混合步行 (MW) 与无负荷跑步间隔.
- 监测生理变量,包括气体交换,温度调节和心血管反应.
主要成果:
- 与温和条件相比,热的条件显著增加了直肠温度,氧气吸收,心血管应变和能量消耗,无论运动类型如何.
- 在炎热的天气中,碳水化合物氧化率更高,特别是在混合步行时.
- 在同一环境内,在运动期间之间没有观察到基质氧化的显著差异,这表明运动间隔没有转移效应.
结论:
- 累积的热负荷,而不是严重的运动间隔,是碳水化合物氧化的主要决定因素,在90分钟的热量载荷运输.
- 这些发现对营养计划有影响,以支持在炎热环境中工作的军事人员.
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