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. 1980 Nov;35(11):828-32.
doi: 10.1136/thx.35.11.828.

Protective effects of repeated short sprints in exercise-induced asthma

R P Schnall, L I Landau

Protective effects of repeated short sprints in exercise-induced asthma

R P Schnall et al. Thorax. 1980 Nov.

Abstract

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.

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