A total of 83 overweight/obese children aged7–9 years were assigned to a 1-year individual or groupbased treatment (GT); 61 children (z-score BMI (zBMI): 1.93 ± 0.28; 27 boys and 34 girls) completed the program. Anthropometric and biochemical parameters were assessed at baseline, at 6 months and at 1 year.