Immediate and Delayed Bronchoconstriction after Exercise in Patients with Asthma

Abstract
Although an immediate asthmatic response after exercise is known to occur in some patients with asthma, the existence of a delayed asthmatic response after exercise is controversial. Accordingly, we studied 53 patients who had an immediate mean (±SD) decrease in forced expiratory volume at one second (FEV1) of 36±13 percent, which was maximal 13±12 minutes after the completion of treadmill exercise.