Airway Responsiveness and Inflammation in Adolescent Elite Swimmers: a 3-Year Prospective Follow-up Study

Previously the investigators have found that adolescent elite swimmers, who have been involved in competitive swimming for only a few years, have not developed respiratory symptoms, signs of airway inflammation or airway hyperresponsiveness exept for a slight increase in airway responsiveness to eucapnic voluntary hyperpnea. In the current study, the investigators will be doing a 3-year follow-up study on the swimmers studied previously.