This project will determine whether exposing youths to a "fitogenic" after-school
environment that emphasizes vigorous exercise and healthy snacks will have a favorable
effect on body composition (i.e., less fat tissue and more lean tissue), cardiovascular
fitness and cardiovascular disease risk profile. The environmental intervention will be
provided in nine schools in Augusta, Georgia, with another nine schools serving as
non-intervention comparison schools. Children in the 3rd grade will be recruited to
participate. They will be followed for 3 years, through the 5th grade. Measurements will
be made at the beginning and end of each school year. The 2-hour after-school intervention
will be offered every school day. It will consist of three components: (1) homework
assistance; (2) a healthy snack; and (3) exercise designed to improve skills and fitness.
3rd graders in schools chosen to participate.