The purpose of this study was to determine if the regression formula developed for the 20-m shuttle run test (20 MST) for children and adolescents with mild mental retardation (MR), used to predict cardiovascular fitness (V̇O2peak), is valid for adolescents with Down syndrome (DS). Twenty-six adolescents (mean age = 15.3 ± 2.7 yr) with DS (15 males, 11 females) completed a maximal treadmill protocol (measured V̇O2peak) and a 20 MST (predicted V̇O2peak). There was a significant difference (p < .01) between the means of the measured (25.5 ± 5.2 ml·kg-1-·min-1) and the predicted (33.5 ± 3.9 ml·kg-1·min-1) V̇O2peak, respectively. In addition, there was a low relationship between measured and predicted values (r = .54). The results of this study indicate that the regression formula developed for children and adolescents with MR to predict V̇O2peak was not valid in this sample of adolescents with DS.
Myriam Guerra is with the Physical Activity and Sports Science Department at Fundació Blanquerna, University Ramon Llull in Barcelona, Spain. Kenneth Pitetti is with the Department of Physiology in the College of Health Professions at Wichita State University, Wichita, KS 67260. E-mail: email@example.com. Bo Fernall is with the Department of Exercise Science at Syracuse University in Syracuse, NY 13244.