Exercise-Induced Bronchoconstriction

Airway contraction associated with exercise is a phenomenon frequently observed in endurance athletes and notably in those engaging in winter sports. The pathophysiology of exercise-induced bronchoconstriction (EIB) is thought to be related to hyperventilation & inhalation of cold air. Whether it be running, cross country skiing, skating, etc., cold hyperventilation load is an important factor in the development of EIB. Hypernea in dry air further places significant environmental stress on the airways. Water loss from the bronchial airway surface leads to airway cooling and mucosal dehydration both of which contribute to EIB. 

Effective non-pharmacological preventative approaches to minimize the risk of such a condition include implementing a very thorough warm up before breathing hard in the cold & using a cloth over the mouth & nose when having to exercise in harsh winter conditions. The latter will serve to both warm and humidify the air. Have a refreshing workout & mask up!