This study investigated the predictors of aerobic fitness (VO2PEAK) in young children on a population-base. Participants were 436 children (229 boys and 207 girls) aged 6.7 ± 0.4 yrs. VO2PEAK was measured during a maximal treadmill exercise test. Physical activity was assessed by accelerometers. Total body fat and total fat free mass were estimated from skinfold measurements. Regression analyses indicated that significant predictors for VO2PEAK per kilogram body mass were total body fat, maximal heart rate, sex, and age. Physical activity explained an additional 4–7%. Further analyses showed the main contributing factors for absolute values of VO2PEAK were fat free mass, maximal heart rate, sex, and age. Physical activity explained an additional 3–6%.
Dencker is with the Dept. of Clinical Physiology, Malmo University Hospital, Malmo, Sweden. Hermansen, Bugge, Froberg, and Andersen are with the Institute of Sport Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark. Andersen is also with the Dept. of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway.