在高强度和中等强度的有氧运动课程后,中脑动脉的血液速度和认知功能
Henrique Nunes Pereira Oliva1, Gustavo Miranda Oliveira2, Isabela Oliveira Oliva2
1Yale University School of Medicine, Department of Psychiatry, New Haven, CT, United States of America; State University of Montes Claros (UNIMONTES), Graduate Program of Health Sciences, Montes Claros, MG, Brazil.
Neuroscience letters
|October 11, 2023
概括
高强度间歇训练 (HIIT) 改善了年轻成年人的执行功能和语义流性. 无论是HIIT还是中等强度持续训练 (MICT),都会增加乳酸,对大脑血流没有不良影响.
科学领域:
- 运动生理学 运动生理学
- 神经科学是一个神经科学.
- 运动医学 运动医学
背景情况:
- 了解不同强度运动对脑血管功能和认知表现的急性影响,对于优化训练方案至关重要.
- 之前的研究已经探讨了运动对大脑的影响,但高强度间歇训练 (HIIT) 和中等强度持续训练 (MICT) 之间的直接比较对特定的大脑血流变量和认知功能的定义较少.
研究的目的:
- 研究HIIT与MICT单次训练对中脑动脉 (MCA) 血流动力学和健康年轻人的认知功能 (CF) 的急性影响.
- 为了比较随机HIIT和MICT会话对大脑血液速度,脉动率指数 (PI),电阻率指数 (RI) 和语言流性和数字跨度等认知指标的影响.
主要方法:
- 一项交叉研究设计,涉及26名健康的年轻成年人 (24±3岁).
- 参与者完成了两个随机的运动会:MICT (60%心率储备) 和HIIT (80%心率储备).
- 测量包括MCA速度,PI,RI通过跨皮多普勒 (TCD),认知功能测试和血清乳酸水平,评估每次运动会前后立即进行.
主要成果:
- HIIT显著改善了执行功能和语义流性,提高了20% (p=0.019).
- 无论是HIIT还是MICT都导致血清乳酸水平显著增加 (HIIT:625%,MICT:238%).
- MICT导致PI (p=0.029) 和RI (p=0.023) 减少,而这些在HIIT后保持稳定. 对于这些血管指数,在HIIT和MICT之间没有观察到显著差异.
- 在HIIT后的认知改善与乳酸的增加呈正相关性 (ρ=0.436,p<0.001).
结论:
- 与健康的年轻成年人中的MICT相比,HIIT在增强执行功能和语义流性方面表现出更好的急性效应.
- 无论是HIIT还是MICT都没有引起健康年轻人脑血管循环的显著不良变化.
- 这些发现表明,运动强度会影响认知结果,在HIIT期间代谢反应 (乳酸盐) 和认知增强之间存在潜在联系.
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