摘要: Exercise-induced asthma (EIA) is the name which describes transitory increase in airways resistance occurs after 6–8 min of strenuous exercise. It defined as a reduction peak expiratory flow rate (PEFR) or forced volume one second (FEV1) 10% more from preexercise level [1, 2]. If specific conductance (SGaw) rates middle half vital capacity (FEF25–75) are measured, 35% characteristic EIA [3, 4]. The values used to define an abnormal response based on changes lung function recorded exercise normal subjects [5, 6]. Under laboratory conditions 70–80% asthmatics exhibit [7, 8].