Play as a Method to Reduce Overweight and Obesity in Children.

The intervention consisted of physical activity based on play, with four 90-minute sessions per week for nine months (the school year). The total of sessions was 144, the minimum number of sessions to consider valid that a child has completed the intervention was 115 (80%) in order to perform the minimum level of physical activity recommended for their ages. In parallel, twice-monthly theoretical and practical sessions of nutritional advice were given to the children and their families. The study group performed the physical activity and received the nutritional advice, while the control group received only the theoretical and practical sessions on nutrition.