PMID: 9192925Jun 1, 1997Paper

Exercise performance in children with asthma: is it different from that of healthy controls?

The European Respiratory Journal
P SantuzF Zacchello

Abstract

Exercise tolerance and possible limitation in work capacity of asthmatic children is still a matter of debate. The aim of this study was to compare ventilation and gas exchange response to exercise of asthmatic children with that of healthy controls. Exercise performance was evaluated in 80 children with mild-to-moderate asthma, aged 7-15 yrs, and in 80 healthy controls matched for age, height, weight and habitual level of physical activity. The children performed a maximal exercise test on a treadmill, during which oxygen uptake (V'O2), carbon dioxide output (V'CO2) and minute ventilation (V'E) were measured continuously. No premedication was given to the asthmatic children. Forced expiratory volume in one second (FEV1) at rest was 93+/-11% of predicted in asthmatic children and 95+/-9% pred in controls. After the run, the mean fall in FEV1 was 13.9% (range 0-57%) and 1.6% (0-9%), respectively (p<0.001). The two groups achieved similar maximum oxygen uptake (V'O2,max) ((mean+/-SD) 40.3+/-8.4 and 42.6+/-9.6 mL x min(-1) x kg(-1) in asthmatics and controls, respectively; NS) and maximum minute ventilation output (V'E,max) (42.9+/-14.8 and 45.7+/-14.9 L x min(-1) respectively; NS). The kinetics of V'O2, V'CO2 and V'E during the t...Continue Reading

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