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在人类的动态炼过程中,对全身热交换进行剂量依赖的非热调节
Sean R Notley1, Ashley P Akerman1, Andrew W D'Souza1
1Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada.
概括
运动期间的非热因素通过减少干热损失和增加蒸发热损失来影响热交换. 这些相反的效应在动态运动期间不会显著改变身体的整体热量储存.
科学领域:
- 运动生理学 运动生理学
- 热调节 热调节 热调节
- 人体生理学 人体生理学
背景情况:
- 在运动期间保持热平衡对于表现和健康至关重要.
- 皮肤的血液流动和出汗是热交换的关键机制,由热和非热因素调节.
- 运动期间非热因素和热调节之间的相互作用尚未完全理解.
研究的目的:
- 为了研究非热刺激对动态运动期间全身热交换的剂量依赖作用.
- 量化非热因素对干燥和蒸发热量损失的影响.
- 了解非热因素如何与热调节相互作用以保持热平衡.
主要方法:
- 直接热量计用于测量全身热量交换.
- 8名参与者在受控的环境条件下 (30°C,20%RH) 进行了自行车运动.
- 应用不同水平的下肢压缩 (0-90 mmHg) 来调节非热刺激.
主要成果:
- 干燥热量损失随着压缩压力增加而降低 (2W/m2每30mmHg增量).
- 蒸发热损失随着压缩压力增加而增加 (5W/m2每30mmHg增量).
- 身体的热量储存和食道温度在所有条件下保持不变.
结论:
- 非热因素对运动期间的干燥和蒸发热量损失产生相反的,剂量取决于剂量的影响.
- 热交换机制中的这些调制不会显著改变整体热平衡.
- 这些发现提供了对身体活动期间调节体温的因素复杂相互作用的新见解.
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