Why can exercise trigger asthma?
It is not known exactly how exercise triggers asthma. When people exercise they breathe faster. This makes it more difficult for the nose and upper airways to warm and add moisture to the air breathed in, resulting in the air being drier and colder than usual. It is thought that this cold, dry air in the airways triggers the symptoms of exercise-induced asthma. Diagnosing exercise-induced asthma To help to diagnose exercise-induced asthma, your doctor may ask about your medical history and take peak flow tests.
