Exercise-induced asthma.

Exercise-induced asthma affects approximately 10 percent of the exercising population but often goes undiagnosed. Diagnosis is generally simple if the physician is aware of the subtle symptoms that may present during or after exercise. Preventive treatment, using a combination of exercise strategies and inhaled medications, is often successful. For patients with underlying chronic asthma that is exacerbated by exercise, long-term medication with preexercise doses is recommended.