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[0] Exercise-Induced Asthma (EIA) [2] Breathing airborne pollens during exercise Breathing air pollutants during exercise Exercising with viral respiratory tract infections Exercising in cold, dry air. [3] Exercise can cause symptoms in up to 80% of people with asthma. 35-40% of people with seasonal allergies also have EIA and symptoms worsen during the spring and fall. [1] 
Triggered by vigorous physical activity. Symptoms of EIA occur to varying degrees in a majority of asthma sufferers and are likely to be triggered as a result of breathing cold, dry air while exercising.
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