Methods We compared functional respiratory testing in 72 asthmatic children (mean age 11.4±2.6 years) and in 70 healthy subjects (mean age 12.5±2.5 years). Each group was divided in 2 subgroups using a physical activity level cut-off (< 2 or > 3 hours spent for week), that way generating 4 study groups: asthmatic trained children, non asthmatic trained children, trained controls, non trained co...