Abstract
OBJECTIVES: Obesity in children and adolescents is a worldwide dramatic health problem, for which treatment is mostly unsuccessful. Therefore, prevention is the most important measure to tackle this problem. The 'EDDY' study as an interventional cohort study with a 1-year lifestyle intervention aimed to affect the lifestyle and nutrition habits of adolescents by intervention with nutritional training and sports programs to prevent obesity. METHODS: Four Viennese schools were cluster-randomized into an intervention group and a control group. A total of 141 pupils aged 11-14 years were included. The intervention group received a comprehensive, age-appropriate training on nutrition and lifestyle exercise intervention for 12 months. Before and after intervention and at two follow-ups, subjects were anthropometrically measured. In addition, knowledge of nutritional issues and eating habits were measured with questionnaires. RESULTS: The data imply an improvement of nutrition knowledge, a significant reduction in the consumption of junk food (p = 0.01), sweets (p = 0.001) and salty snacks (p < 0.001) as well as a slight improvement of physical performance after intervention. Although there was a trend for a less increase of body fat in the intervention group, no significant changes could have been shown in the anthropometric data. CONCLUSIONS: An age-adjusted lifestyle intervention based on dietary training and exercise can improve the nutritional knowledge and eating habits of school children.