Childhood obesity has been growing at an alarming rate and is the most common nutritional problem among children (WHO, 2000). Several reports already showed high and increasing rates of overweight and obesity among preschool children living in developing countries (de Onis & Blössner, 2000). The most common causes are lack of physical activity, unhealthy eating patterns, high level of inactivity or sedentary behaviour, genetic factors, or a combination of these factors. For more information on our study, click here.