Hyvinkää Childhood Obesity Study (HCOS), Randomized Controlled Clinical Trial for Effectiveness and Costs of a 1-year Lifestyle Intervention.

"The 1-year lifestyle intervention includes intensive, family-based diet and physical activity counselling. Children with their parents meet the pediatrician two times, the specialist nurse five times and the clinical nutritionist three times during the 1-year intervention. One of the meetings with the clinical nutritionist is only for parents and the child is with the nurse at the same time.~The participants in the intervention group are advised and motivated to increase their regular daily physical activity and to reduce sedentary habits. They have one group session for the training in the gymnasium with physical education instructor. The physical education instructor gives a voluntary lecture for parents about increasing physical activity and reducing sedentary time."