适度强度有氧运动在低氧和热条件下对内皮功能的影响
Takuma Morishima1, Keiichi Yamaguchi2, Kazushige Goto2
1Faculty of Liberal Arts and Sciences, Chukyo University, Aichi, Japan.
Clinical physiology and functional imaging
|June 26, 2024
概括
在热和低氧条件下进行有氧运动会增加交感神经活动,但不会改善内皮功能或血液流动. 这项研究探讨了极端环境中的运动反应.
科学领域:
- 环境生理学环境生理学
- 运动生理学 运动生理学
- 心血管生理学心血管生理学
背景情况:
- 内皮功能对心血管健康至关重要.
- 低氧和热环境对炼反应的影响尚不清楚.
- 以前的研究已经独立研究过缺氧或热量,但没有研究它们在运动期间对内皮功能的综合作用.
研究的目的:
- 为了研究有氧运动在低氧和热环境中对内皮功能的影响.
- 为了比较在normoxic,hypoxic,hot以及hypoxic和hot条件下对运动的生理反应.
- 为了确定组合环境压力因素是否比单个压力因素更加强内皮功能.
主要方法:
- 12名健康的男性在50%的最大氧气摄入量下进行了30分钟的自行车运动.
- 测试了四种环境条件:正常氧 (NOR),缺氧 (HYP),热 (HOT) 和组合缺氧和热 (HH).
- 心血管变量,血液标记物和内皮功能的流媒扩张 (FMD) 在运动前,运动期间和运动后被评估.
主要成果:
- 在组合低氧和热 (HH) 试验中,心率显著更高.
- 与其他试验相比,HH试验中的血类甲醇胺水平 (上腺素,北上腺素,多巴胺) 显著升高.
- 在运动后的四种条件中,没有观察到腕动脉血流,剪切率或口病的显著差异.
结论:
- 在热和低氧环境中进行有氧运动,会更强烈地激活交感神经系统活动.
- 这种结合的环境不会导致血液流动,剪切率或内皮功能显著改善.
- 通过将热应激添加到缺氧中,内皮功能适应运动并没有进一步改善.
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