Treatment of Exercise-Induced Asthma

First-Line Treatment

• The American Thoracic Society recommends inhaled short-acting β2-agonist (SABA) administration 15 minutes before exercise for all patients with exercise-induced bronchoconstriction (EIB), with strong recommendation and high-quality evidence 1, 2
• SABA use should be less than daily on average, ideally less than 4 times per week, to prevent tolerance development, as recommended by the American Academy of Allergy, Asthma, and Immunology 3, 4

Second-Line Options for Persistent Symptoms

• The American College of Chest Physicians recommends daily inhaled corticosteroid (ICS) for patients with persistent symptoms, with strong recommendation and moderate-quality evidence 2, 5
• The American Academy of Allergy, Asthma, and Immunology recommends daily leukotriene receptor antagonist (LTRA) such as montelukast for patients with persistent symptoms, with strong recommendation and moderate-quality evidence 2, 5
• The American Thoracic Society recommends mast cell stabilizing agent before exercise for patients with persistent symptoms, with strong recommendation and high-quality evidence 5

Important Cautions and Considerations

• The American College of Chest Physicians strongly recommends avoiding daily use of an inhaled long-acting β2-agonist (LABA) as monotherapy due to serious side effect concerns, with strong recommendation and moderate-quality evidence 2, 5
• Tolerance can develop with regular use of β2-agonists, manifested as reduced duration of protection, reduced magnitude of protection, and prolonged recovery time after exercise, as reported by the Journal of Allergy and Clinical Immunology 3, 4

Non-Pharmacologic Approaches

• The American College of Sports Medicine recommends a warm-up period before exercise to induce a refractory period, with evidence from the Journal of Allergy and Clinical Immunology and the American Journal of Respiratory and Critical Care Medicine 7, 8
• The American Thoracic Society recommends wearing a mask or scarf over the mouth during cold weather exercise, with evidence from the Journal of Allergy and Clinical Immunology and the American Journal of Respiratory and Critical Care Medicine 7, 8