[EFFECT OF A HEALTHY EATING AND PHYSICAL ACTIVITY INTERVENTION PROGRAM ON CHILHOOD OBESITY]. 
interventions aiming to develop healthy lifestyle behaviours at early age could be an effective way of reducing childhood obesity.  to evaluate the effect of a dietary and physical activity intervention on reducing childhood obesity.  312 students took part on this 5 month intervention study.  The intervention included dietary talk delivered to children and their parents in addition to 45 minutes of daily physical activity modules.  Nutritional status was assessed using the Obesity Task Force criteria.  Changes in dietary behaviours and physical activity were assessed using questionnaires administrated to the parents.  body mass index decreased significantly post intervention (-0.2 kg.m-2), however, this reduction was driven by boys (-0.3 kg.m-2).  Similarly, waist circumference shows a significant reduction in boys (-0.4 cm) but not girls.  Children with overweight or obesity shows greater reductions in obesity-related traits, which were related to changes in dietary and physical activity post interventions.  multidisciplinary interventions applied to children between 5 and 7 years old are effective on reducing body mass index and improving dietary and physical activity behaviours in overweight and obese children.