Normal values for cardiopulmonary exercise testing in children

We want to thank Dr Hager for his valuable comments. We agree that many cardiopulmonary exercise data are largely influenced by the onset or progress of puberty. We therefore kindly take the opportunity to present our data as related to height as well (Table 1 and Figures 1−4). Although it would be appropriate to take the actual stage of puberty into account, this was not noted during our study, and therefore height will be a valuable alternative parameter. In addition we will also present the individual data in separate figures, giving the values for boys and girls separately. Regression equations for all height-dependent variables. The equations for boys and girls are given separately. All equations are significant at p < 0.001. No significant relation was found between height and VO2peak for the girls (VO2peak was constant with height) Height, body height (cm); HR01perc, percentage heart rate recovery at 1 minute (HRmax−HRpresent)/(HRmax−HRrest)*100%; SD, standard deviation; SEE, standard error of the estimate; VE/VCO2, slope of respiratory minute volume to CO2 production; VO2peak, maximal oxygen uptake (ml/kg/min); Wpeak, work rate at peak exercise (Watt); Wpeak/kg, Watt/kg at peak exercise. Regression equations for all height-dependent variables. The equations for boys and girls are given separately. All equations are significant at p < 0.001. No significant relation was found between height and VO2peak for the girls (VO2peak was constant with height) Height, body height (cm); HR01perc, percentage heart rate recovery at 1 minute (HRmax−HRpresent)/(HRmax−HRrest)*100%; SD, standard deviation; SEE, standard error of the estimate; VE/VCO2, slope of respiratory minute volume to CO2 production; VO2peak, maximal oxygen uptake (ml/kg/min); Wpeak, work rate at peak exercise (Watt); Wpeak/kg, Watt/kg at peak exercise. The relation between height and the maximal work rate for the individual subjects is shown. The mean value as well as the 95% prediction interval of work rate related to height are shown. Upper panel, boys; lower panel, girls. The difference between boys and girls is significant. The relation between height and the power/kg for the individual subjects is shown. The mean value as well as the 95% prediction interval of power/kg related to height are shown. Upper panel, boys; lower panel, girls. The difference between boys and girls is significant. The relation between height and the VE/VCO2 slope for the individual subjects is shown. The mean value as well as the 95% prediction interval of VE/VCO2 slope related to height are shown. Upper panel, boys; lower panel, girls. The relation between height and the HR recovery at 1 minute for the individual subjects is shown. The mean value as well as the 95% prediction interval of HR recovery at 1 minute related to height are shown. Upper panel, boys; lower panel, girls.