Exercise-induced asthma (EIA) may be an anaphylactic reaction to a food rather than a response to physical activity. Doctors have discovered that quite a few cases have occurred when the sufferer has eaten certain foods before - and sometimes after - exercising.
The troublesome foods include wheat, shrimp, shellfish, chicken, nuts, apples, peaches, grapes, celery, tomato, fennel, lettuce and potato.
One nine-year-old boy's EIA disappeared after he stopped drinking cow's milk before any physical activity. He ignored the advice on two occasions, and both times he developed an asthma-like attack, which in fact was an anaphylactic reaction.
(Source: Allergy, 2007; 62: 335-6).