section_path: Diagnosis/Classification/Exercise-induced
section_name: Exercise-induced
paragraph_text: Exercise-induced
  
  Exercise can trigger bronchoconstriction both in people with or without asthma. It occurs in most people with asthma and up to 20% of people without asthma. Exercise-induced bronchoconstriction is common in professional athletes. The highest rates are among cyclists (up to 45%), swimmers, and cross-country skiers. While it may occur with any weather conditions, it is more common when it is dry and cold. Inhaled beta agonists do not appear to improve athletic performance among those without asthma; however, oral doses may improve endurance and strength.