Robinson Austin T, Fancher Ibra S, Mahmoud Abeer M, Phillips Shane A
Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE.
Exerc Sport Sci Rev. 2018 Jan;46(1):48-55. doi: 10.1249/JES.0000000000000130.
Endothelium-dependent vasodilation is reduced after acute exercise or after high intraluminal pressure in isolated arterioles from sedentary adults but not in arterioles from regular exercisers. The preserved vasodilation in arterioles from exercisers is hydrogen peroxide (H2O2) dependent, whereas resting dilation is nitric oxide (NO) dependent. We hypothesize chronic exercise elicits adaptations allowing for maintained vasodilation when NO bioavailability is reduced.
在久坐不动的成年人的离体小动脉中,急性运动后或腔内压力升高后,内皮依赖性血管舒张功能会降低,但经常锻炼者的小动脉则不会。锻炼者小动脉中保留的血管舒张功能依赖于过氧化氢(H2O2),而静息舒张则依赖于一氧化氮(NO)。我们推测,长期运动可引发适应性变化,从而在NO生物利用度降低时维持血管舒张功能。