Prevalence of exercise-induced bronchoconstriction in teenage football players in Tunisia (original) (raw)

2009, Annals of Saudi Medicine

E xercise-induced bronchoconstriction (EIB) also referred to as exercise-induced airway hyperre-sponsiveness in athletes, is a common, but often unrecognized condition because it is underdiagnosed, occurring in both known asthmatic and healthy athletes. 1 Sparsely studied, the EIB is defined as the occurrence of a transient airway obstruction, immediately to 30 minutes after vigorous exercise, while exercise-induced asthma is used to describe this condition in subjects who have previously diagnosed respiratory symptoms. 1,2 EIB affects 4% to 20% of the general population and 40% to 90% of asthmatic patients. 1,3 The prevalence of EIB among athletes trained for high level endurance competitions (cross-country skiers, ice skaters, cyclists, swimmers or long distance runners) ranges from 10% to 55%. 1-4 EIB in amateur athletes has not been well documented, but was reported at a lower prevalence of 5.3% in amateur endurance-trained athletes. 5 The pathogenesis of EIB is not clearly defined, but there is general agreement that inhalation of large volumes of cold, dry air during exercise leads to a loss of heat and water from the bronchial mucosa leading to

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