Obesity is a pandemic of modern societies and data seem very alarming in Greece. According to a recent study of the 1st Dpt of Pediatrics of Athens University, about 20.63% and 11.8% of adolescent boys were overweight and obese respectively. The relevant numbers for girls were 14.4% και 3.65% for overweight and obese respectively. Obesity in adolescence predicts maintenance in adulthood, with various severe physical and psychological impacts.