Broncoespasmo induzido por exercício em corredores brasileiros de longa distância de elite

Abstract

Objective: To determine the prevalence of exercise-induced bronchoconstriction among elite long-distance runners in Brazil and whether there is a difference in the training loads among athletes with and without exercise-induced bronchoconstriction. Methods: This was a cross-sectional study involving elite long-distance runners with neither current asthma symptoms nor a diagnosis of exercise-induced bronchoconstriction. All of the participants underwent eucapnic voluntary hyperpnea challenge and maximal cardiopulmonary exercise tests, as well as completing questionnaires regarding asthma symptoms and physical activity, in order to monitor their weekly training load. Results: Among the 86 male athletes recruited, participation in the study was agreed to by 20, of whom 5 (25%) were subsequently diagnosed with exercise-induced bronchoconstriction. There were no differences between the athletes with and without exercise-induced bronchoconstriction regarding anthropometric characteristics, peak oxygen consumption, baseline pulmonary function values, or reported asthma symptoms. The weekly training load was significantly lower among those with exercise-induced bronchoconstriction than among those without. Conclusions: In this sample of long-distance runners in Brazil, the prevalence of exerciseinduced bronchoconstriction was high.Keywords: Athletes; Asthma, exercise-induced; Exercise test. ResumoObjetivo: Determinar a prevalência de broncoespasmo induzido por exercício em corredores brasileiros de longa distância de elite e se há uma diferença na carga de treinamento entre atletas com e sem broncoespasmo induzido por exercício. Métodos: Estudo transversal com corredores de longa distância de elite sem sintomas atuais de asma e sem diagnóstico de broncoespasmo induzido por exercício. Todos os participantes foram submetidos ao teste de hiperventilação voluntária eucápnica e ao teste cardiopulmonar de esforço máximo e responderam a questionários sobre sintomas de asma e atividade física para monitorizar sua carga de treinamento semanal. Resultados: Dos 86 atletas do sexo masculino recrutados, 20 concordaram em participar do estudo, dos quais 5 (25%) foram diagnosticados com broncoespasmo induzido por exercício. Não foram evidenciadas diferenças entre os atletas com e sem broncoespasmo induzido por exercício em relação a características antropométricas, consumo de oxigênio de pico, valores basais de função pulmonar ou sintomas de asma relatados. A carga de treinamento semanal foi significativamente menor nos atletas com broncoespasmo induzido por exercício do que naqueles sem esse diagnóstico. Conclusões: Nesta amostra de corredores de longa distância brasileiros, a prevalência de broncoespasmo induzido por exercício foi alta. predictors of EIB and, therefore, should not be the sole basis for prescribing medications. (4,15) Interestingly, the International Olympic Committee has reported that the notification of β 2 agonist use by athletes correlates with the prevalence of asthma symptoms in all countries except Bra...

The Relationship of IL-8 and IL-10 Myokines and Performance in Male Marathon Runners Presenting Exercise-Induced Bronchoconstriction

“…This observation can be explained by the fact that, clinically, the symptoms of EIB might be confused with typical symptoms of exhaustion/dyspnea during exercise as a result of performing exercise at such intensive level, such as in a marathon. Nevertheless, the percentage of EIB+ found here in relation to marathon runners is in agreement with other studies [22,23], and is higher than in the general population [19][20][21]23].…”

“…The present study showed that the prevalence of EIB among enrolled marathon runners was 23.6%, which is in agreement with other studies [19][20][21][22]. Based on this finding, the volunteers were distributed into two groups (EIB+ and EIB−), allowing us to evaluate the differences in pulmonary and aerobic capacities, as well as in the inflammatory response between these groups, in order to correlate such responses with marathon performance.…”

Intensity of swimming exercise influences tracheal reactivity in rats

“…In light of this, the consensus is that moderate-intensity exercise is more suitable to achieve the benefits of physical training while minimizing asthma attacks in humans (33). In fact, some studies have shown a severe bronchospasm in response to high intensity exercise both in people with respiratory problems (34) and athletes (35, 36). …”

AQUA© as predictor of allergy in elite marathon runners

“…Thus, 62% of the athletes considered allergic (AQUA+) claimed shortness of breath, cough and/or itchy throat during or following exercise (AQUA © question 13). The prevalence of EIB symptoms was higher than those observed in soccer players and recreational runners (11.7% and 32%, respectively) [6,7], and was even higher than in a study previously performed by our group that assessed the prevalence of EIB, using eucapnic voluntary hyperventilation (EVH), in elite long distance runners [17]. However, the lack of an objective assessment, such as EVH, may have influenced the higher prevalence of allergic symptoms that were observed in the present study compared to our previous study [17].…”

“…However, it seemed unnecessary because the AQUA © questionnaire has been previously validated based on its association with IgE levels, and demonstrating high specificity [6]. Moreover, according to our previous experience with elite runners [17], blood collection is not well accepted either by athletes or by their coaches due to possible doping concerns.…”