Bronchospasme induit par l’exercice chez des sportifs de compétition en milieu tropical humide

Controversies and New Hypotheses on Exercise-Induced Bronchospasm in Hot and Humid Air

“…A recent work by [14] seems consistent with this strategy, as these authors highlighted a low prevalence of EIB of 7% among 54 Brazilian semi-professional football players in hot and humid climates. In contrast, previous studies by Messan et al [15], Ouattara et al [17] and Agodokpessi et al [18] found prevalence values of 42% and 42% in Ivorian and African basketball players, respectively, under hot and humid air conditions. However, the physiological adaptation of subjects to cold and dry air conditions, on the one hand, and hot and humid air conditions, on the other hand, can exacerbate or attenuate the occurrence of EIB.…”

“…Nsompi et al [16] observed 33% in Congolese runners in hot and humid condition. In another study carried out in Abidjan in the Ivory Coast, Ouattara et al [17] reported an asthma prevalence of 42.6% obtained after a stress test, with a Forced Expiratory Volume in one second (FEV) of at least 10% for sportsmen in hot (30.1 °C) and wet (82.6%) climates. Agodokpessi et al [18] found an asthma prevalence of 40% among African athletes in the hot and humid climate of Benin.…”

“…However, the authors noted that the warming effect could simply be due to the prolonged retention of the air in alveoli. On the other hand, the amount of blood circulating in the bronchi cannot justify the increased heat in the airways since this amount of blood represents only approximately 1% of the cardiac output [17] , [22].…”

Levels of Fine Particle Concentrations in Schools and Postexercise Pulmonary Function Disorders in Schoolchildren in Brazzaville

“…Based on the work of Ouattara et al [18] and Thole et al [19], a decrease in postexercise peak expiratory flow (PEF) greater than or equal to 15% compared to pre-exercise PEF was retained as a criterion for diagnosing exercise-induced bronchospasm (EIB) in subjects participating in this study. This criterion allowed us to identify the subjects who were positive or sensitive to EIB to form EIB (+) group and the subjects who were negative or not sensitive to EIB to form the EIB (−) group.…”