Exercise-induced bronchoconstriction
Exercise-induced bronchoconstriction (EIB) occurs when the airways narrow as a result of exercise. This condition has been referred to as exercise-induced asthma (EIA), however this term is no longer preferred. While exercise does not cause asthma, it is frequently an asthma trigger.
| Exercise-induced Bronchoconstriction | |
|---|---|
| Other names | EIA |
| Specialty | Pulmonology |
| Symptoms | Shortness of breath on vigorous exercise |
| Usual onset | Rapid, on exercise |
| Duration | For the duration of activity and some time afterwards |
| Causes | Moderate to high intensity exercise |
It might be expected that people with E.I.B. would present with shortness of breath, and/or an elevated respiratory rate and wheezing, consistent with an asthma attack. However, many will present with decreased stamina, or difficulty in recovering from exertion compared to team members, or paroxysmal coughing from an irritable airway. Similarly, examination may reveal wheezing and prolonged expiratory phase, or may be quite normal. Consequently, a potential for under-diagnosis exists. Measurement of airflow, such as peak expiratory flow rates, which can be done inexpensively on the track or sideline, may prove helpful. In athletes, symptoms of bronchospasm such as chest discomfort, breathlessness, and fatigue are often falsely attributed to the individual being “out of shape”, having asthma, or possessing a hyperreactive airway rather than EIB.