High incidence of exercise-induced bronchoconstriction in triathletes of the Swiss national team.

Aim: To assess the progression of bronchial reactivity (BR) and incidence of bronchial hyperreactivity (BH), exercise-induced bronchoconstriction (EIB) and asthma in triathletes over 2 years.

Methods: Subjects were seven athletes from the Swiss national triathlon team (mean (SD) age 24.3 (4.