Protective effects of repeated short sprints in exercise-induced asthma.
Many asthmatic patients demonstrate bronchial lability with a six-minute period of exercise, which is characterised by an initial bronchodilatation followed by bronchoconstriction. This early bronchodilatation response has been further analysed by investigation of the effects of repeated 30-second sprints before and after a six-minute run. It was found that these repeated short sprints did not induce bronchoconstriction, resulted in less bronchoconstriction after a subsequent six-minute run, and caused bronchodilatation if exercise-induced bronchoconstriction was present. It is postulated that this effect may be related to an increase in circulating catecholamines or altered vagal-sympathetic balance.
D000293:Adolescent; D000328:Adult; D001249:Asthma / Q000517:prevention & control*; D001250:Asthma, Exercise-Induced / Q000503:physiopathology / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008297:Male; D005082:Physical Exertion; D012129:Respiratory Function Tests