Exercise-induced bronchospasm is a common complication of asthma. Aggressive treatment of this conditions permits patients to maintain full activity despite their illness. Since most asthmatic patients are healthy except for an intermittent respiratory problem, providing them the opportunity to exercise in all weather conditions affords a clear improvement in their quality of life. Conceptualizing exercise-induced bronchospasm as a hyperreactive airway response to rapid inhalation of cool, dry air leads logically to the primary methods used to treat this disorder.