Objectives. Review the epidemiology of Exercise Induced Bronchospasm (EIB)Understand the pathophysiology of EIBReview the treatment and prophylaxis of EIB. Definition. Airway obstruction, and hyper responsivenessTriggered by exercise. Prevalence. 7% of general population have asthma80-95%% have EIB15-20% general population have allergic rhinitis40% have EIB3-4% of the general population with neither asthma nor allergies have EIB.