脑血流和心脏功能的性别差异,以应对在炎热的运动
João Carlos Locatelli1, Juliene G Costa1, Kristanti W Wigati1,2
1School of Human Sciences, The University of Western Australia, Crawley, Western Australia, Australia.
Experimental physiology
|October 25, 2025
概括
男人和女人在热运动期间,大脑血流发生类似的变化. 然而,男性心脏功能下降,心脏和大脑血流变化之间的联系更强.
科学领域:
- 身体生理学 身体生理学
- 运动科学 运动科学
- 心血管生理学心血管生理学
背景情况:
- 在炎热的条件下炼会带来生理上的挑战.
- 了解心血管和脑血管反应的性别差异对于运动安全和表现至关重要.
- 以前的研究还没有完全阐明热运动对心脏和大脑血液动力学的性别特异性影响.
研究的目的:
- 为了研究运动期间在炎热条件下大脑血流和左心室 (LV) 功能的性别差异.
- 探索男性和女性对热运动的脑血管和心脏反应之间的关系.
主要方法:
- 38名健康的成年人 (19名男性,19名女性) 在40°C的热室中进行了90分钟的跑步机步行 (5公里/小时,2%的倾斜).
- 通过中脑动脉速度 (MCAv) 评估大脑血液流动,使用横多普勒.
- 使用全球纵向应变 (GLS) 通过斑点跟踪回声心脏学来评估左心室缩功能.
主要成果:
- 两种性别都表现出类似的中脑动脉速度变化模式,最初的非显著增加随后在60分钟和90分钟显著下降.
- 60分钟和90分钟后,男性的LV全球纵向应变显著减少,而女性没有显著变化.
- 与女性相比,男性的GLS和MCAv变化之间的相关性在男性中更强.
结论:
- 男性和女性表现出可比的脑血管反应,以运动在热.
- 性差异出现在心脏功能 (GLS) 和其与热应激期间大脑血流的关系中.
- 这些发现表明,在炎热的环境中炼期间,潜在的性别特异机制会影响心血管和脑血管的合.
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