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Some people can actually be clinically allergic to exercise

It's a fact!

If you’re feeling the burn as you work your body back up to fitness, there might be more than just muscle pain at play, particularly if you’re experiencing nausea, cramping, or even hives. There are a couple of rare forms of anaphylaxis (acute allergic reaction) that have been linked to exercise. Exercise-induced anaphylaxis (EIAn) is a disorder in which physical exertion triggers a reaction, and Food-dependent, exercise-induced anaphylaxis (FDEIAn) is the slightly-easier-to-manage form in which the reaction is found to be triggered by eating specific foods in the hours leading up to exercise.

These disorders are more common among adolescents and younger adults, and straight-up EIAn is rare and difficult to diagnose. However, the Food-dependent form can sometimes be diagnosed by an allergist using a combination of the usual skin and blood tests plus a careful history of the anaphylactic episode.

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Raymond Lepage, PhD, Doctor in Biochemistry
Raymond Lepage, PhD, Doctor in Biochemistry
Science popularizer