寒冷压力和体力表现下降的生物标志物,在寒冷环境下进行低极限运动时与短暂的回暖
Brandon M Roberts1, Christopher L Chapman, Erica A Schafer
1United States Army Research Institute of Environmental Medicine (USARIEM), Natick, MA.
Medicine and science in sports and exercise
|April 23, 2025
概括
暴露于寒冷会显著损害身体表现和灵敏度,特别是在0°C. 短暂的回暖期部分恢复了性能,但唾液生物标志物没有预测这些变化.
科学领域:
- 身体生理学 身体生理学
- 环境医学 环境医学
- 运动科学 运动科学 运动科学
背景情况:
- 暴露于寒冷会对身体表现产生负面影响.
- 性能降低的程度与冷应变的严重程度相关.
- 确定冷菌株的损伤值和非侵入性生物标志物至关重要.
研究的目的:
- 调查不同程度的寒冷暴露对身体表现的影响.
- 评估寒冷暴露期间温度调节和唾液生物标志物的变化.
- 评估短暂的回暖期对表现和生理标志物的影响.
主要方法:
- 14名参与者在交叉设计中经历了三种寒冷条件 (0°C,10°C,20°C).
- 使用明尼苏达州完整敏捷性测试 (CMDT) 和手握强度 (HGS) 测量体力表现.
- 温度调节 (皮肤和核心温度),热感和唾液生物标志物 (α-氨酶,皮质醇) 被监测.
主要成果:
- 皮肤温度在0°C和10°C发生显著降低,特别是在前臂和手指.
- 身体表现 (CMDT和HGS) 在0°C和10°C下显著下降,在0°C下最大的损害.
- 唾液α-氨酶和皮质醇水平没有显著变化;然而,在23°C进行10分钟的加热提高了性能,并减少了不适.
结论:
- 在0°C和10°C的寒冷暴露显然会损害身体表现.
- 10分钟的热身时间可以部分恢复失去的体力表现.
- 在这项研究中,唾液生物标志物并不是寒冷引起的性能损害的有效预测因素.
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