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Unexplained respiratory symptoms during exercise are often incorrectly considered secondary to exercise induced asthma/bronchospasm.
An important diagnosis on the differential should be exercise-induced laryngeal obstruction (EILO).
Of 91 athletes referred for asthma workup, 35% had EILO.
The presence of inspiratory symptoms did not differentiate athletes with and without EILO.
61% of athletes with EILO used regular asthma medication at referral.