| (华南师范大学 体育科学学院，广东 广州510631) 摘要：综述了有关不同强度和形式的运动，以及特殊环境下运动对脑血流和脑自动调节影响的研究。结果说明中小强度的运动可引起脑血流速度的升高，而高强度运动则使其降低。与动力性运动不同，静力性运动不改变脑血流速度。运动中血流的改变与交感激活引起的血管舒缩和二氧化碳改变有关。通常脑血流自动调节能力不因运动而改变，但力竭运动可使之减弱。热环境下运动时脑血流速度加快以增加散热，但高热下运动时脑血流速度会因过度通气而下降，从而使脑内热积聚，导致疲劳。低氧环境下运动时脑血流速度明显加快以保证大脑足够的氧供，但急性低氧暴露可抑制运动对脑血流的增加效应。 关键词：脑血流速度； 脑自动调节； 运动强度； 热环境； 低氧暴露 中图分类号：G8042文献标识码：A文章编号：1006-7116(2006)04-0057-04 |
GUO Hong
| (College of Physical Education,South China Normal University，Guangzhou 510631,China) Abstract:This review summarized the effect on cerebral blood flow (CBF) and cerebral autoregulation (CA) of different kind of exercises with different intensity or under special environment. CBF is increased during moderate exercise but decreased in heavy exercise,as well as augmented in dynamic exercise yet maintained in static exercise.The change of CBF is due to the sympathetic activation and carbon dioxide change during exercise.Also,CA is not changed with the exercise,but might be impaired by exhaustive ones. CBF is enhanced for the heat remove during exercise in heat,yet reduced with hyperthermia because of the hyperventilation. And exercise under hypoxic exposure causes the more rapid CBF to provide adequate oxygen to brain, though acute hypoxic exposure inhibits this reaction. Key words:cerebral blood flow velocity; cerebral autoregulation; exercise intensity; hyperthermia; hypoxic exposure |
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