剧烈运动期间脑氧输送不足与中枢性疲劳。
Inadequate cerebral oxygen delivery and central fatigue during strenuous exercise.
作者信息
Nybo Lars, Rasmussen Peter
机构信息
Institute of Exercise and Sport Sciences and Department of Anaesthesia, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
出版信息
Exerc Sport Sci Rev. 2007 Jul;35(3):110-8. doi: 10.1097/jes.0b013e3180a031ec.
PMID:17620929
Abstract
Under resting conditions, the brain is protected against hypoxia because cerebral blood flow increases when the arterial oxygen tension becomes low. However, during strenuous exercise, hyperventilation lowers the arterial carbon dioxide tension and blunts the increase in cerebral blood flow, which can lead to an inadequate oxygen delivery to the brain and contribute to the development of fatigue.
摘要
在静息状态下，大脑受到缺氧保护，因为当动脉血氧张力降低时，脑血流量会增加。然而，在剧烈运动期间，过度通气会降低动脉二氧化碳张力，并抑制脑血流量的增加，这可能导致大脑的氧气供应不足，并促使疲劳的产生。
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