http://www.nida.nih.gov/ Scroll down to:Companion Web sites for more information. All of this
site is very interesting but “Companion Websites” may be most helpful for the information for which you are looking.
Exercise training programs for fitness and sport. This site is located in the UK. Their
site includes approx. 30 workouts, ranging from the "6 Minute Workout" to recommendations for younger children. http://www.netfit.co.uk/wkmen.htm