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在竞争性运动员中,加热的环境抵消了对长时间划船运动的心血管反应
Igor V P Dos S Barreto1, Gabriel D Rodrigues2, Josie de S Oliveira1
1Laboratory of Experimental and Applied Exercise Physiology, Department of Physiology and Pharmacology, Federal Fluminense University, Brazil.
Journal of thermal biology
|June 16, 2023
概括
热应激显著损害了划船性能,并增加了长时间运动期间感知到的劳动力. 心血管反应发生变化,中风体积减少,心率增加,在炎热条件下影响耐力运动员.
科学领域:
- 运动生理学 运动生理学
- 环境生理学环境生理学
- 运动科学 运动科学 运动科学
背景情况:
- 长时间的划船对竞技运动员至关重要,通常涉及在具有挑战性的环境中进行训练.
- 了解热应激对生理的影响对于优化运动表现和安全至关重要.
研究的目的:
- 为了检查热应激对体力表现,乳酸盐水平和长时间运动期间竞争手的心肺呼吸反应的影响.
- 为了比较热应激下的生理和感知反应与热舒适条件.
主要方法:
- 十二名有竞争力的划船员在两种热应力下 (大约12公里) 完成了12公里的划船练习. 30°C) 和热舒适度 (22°C) 的条件.
- 记录了包括心率,中风量,心脏输出,氧气吸收,乳酸度和感知劳力的评级在内的生理测量.
主要成果:
- 热应激导致工作负荷和氧气吸收减少,并在划船练习的后期阶段增加了感知力的评分.
- 在热应激下观察到心血管漂移,其特点是中风体积减少和心率增加,而不会改变心脏输出.
- 在热应激条件下,与热舒适相比,观察到面部温度升高.
结论:
- 热应激会对长时间的划船性能产生负面影响,并增加竞争力划船者的感知力度.
- 在热应激下心血管调整表明耐力运动期间存在显著的生理应力.
- 长时间在炎热的天气下划船的最后阶段对于表现和感知到的精力是特别关键的.
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