As many as 90% of all people who have asthma will experience symptoms of EIB during exercise. For teenagers and young adults, this may be the most common cause of asthma symptoms.

Is EIB normal?

As many as 90 percent of people with asthma also have EIB, but not everyone with EIB has asthma. Many elite and world-class athletes have EIB – including Olympic medal winners in sports like cross country skiing, figure skating and ice hockey.

How common is exercise-induced asthma?

Exercise-induced asthma, sometimes called exercise-induced bronchospasm or sports-induced asthma, is common. About 90% of people with asthma have symptoms of asthma during or after exercise. But people who don't have asthma can get EIB too. Around 10% of people without asthma have exercise-induced asthma.