Analysis of scale VO sub( 2)peak in obese adolescents with asthma and non-asthmatic by different methods and ergometers

The low level of fitness is characterized as a factor that predisposes asthma attacks showing a decrease in ventilatory function. This study aimed to compare the VO sub( 2)peak values obtained in treadmill and bike using the conventional and allometric method in obese asthmatics and non-asthmatics. Participated 24 obese adolescents, ten obese asthmatic group (OAG) and fourteen non-obese asthmatics group (NOAG), assessed with anthropometric, spirometric and cardiorespiratory evaluation. The diagnosis of asthma has been through clinical history and ISAAC questionnaire, and obesity as BMI above the 95th percentile. To assess cardiorespiratory tests were performed maximal treadmill and bike. The VO sub( 2)max was represented in three methods: absolute values (VO sub( 2)max-abs), the conventional method with the values for body weight (VO sub( 2)max-conv) and the allometric method (VO sub( 2)max-alo). For the absolute values, there were significant differences for the OAG and NOAG between the ergometers and groups (intra and intergroup). In the conventional method, for comparison group ergometer, differences were found for the NOAG on the treadmill compared to the OAG and NOAG on the treadmill compared on the bike. When used the method of allometric scaling, there were no significant differences in the group and ergometer used. Comparing the values of VO sub( 2)max by absolute and conventional methods differences were found between groups and ergometers in the adolescents. However, when compared by allometric method these differences are not indicated.