 All adolescents participated in a three-day per week training programme 45 minutes per training session. Training was directed by a professional teacher of physical education in a public training centre. The training program was designed according to the type and intensity of exercise that school children normally perform. Many activities were delivered as games in order to encourage enthusiasm and participation. Endurance type activities accounted for most of the time spent in training about 50 team sports and 50 running games, with attention to coordination and flexibility skills. In order to encourage adolescents behaviour change, they were instructed to add an extra 30-45 minutes of walking or other sport activity of their preference at least once a week and to reduce inactivity discouraging television watching and playing video games and encouraging the use of stairs instead of lifts and playing outdoors. 