Air quality and temperature effects on exercise-induced bronchoconstriction.

摘要: Exercise-induced bronchoconstriction (EIB) is exaggerated constriction of the airways usually soon after cessation exercise. This most often a response to airway dehydration in presence inflammation person with responsive bronchial smooth muscle. Severity related water content inspired air and level ventilation achieved sustained. Repetitive hyperpnea dry during training associated inflammatory changes remodeling. A exercise that pollution or allergen considered EIB. Ozone particulate matter are widespread pollutants concern for exercising population; chronic exposure can lead new-onset asthma Freshly generated emissions less than 100 nm harmful. Evidence acute long-term effects from while inhaling high levels ozone and/or exists. Much evidence supports relationship between development disorders chlorinated pool. Swimmers typically do not respond pool; however, large percentage responds challenge. Studies support oxidative stress mediated pathology more severe occurs asthmatic. Winter sport athletes swimmers have higher prevalence EIB, remodeling other general population. Because fossil fuel powered ice resurfacers rinks, rink shown rates EIB asthma. For athlete urban environment, low traffic hours areas suggested.