This publication presents information on physical activity among children and youth. Section 1 discusses physical activity patterns of young people, explaining that the issue has been a concern for educators and health professionals for several years because of the trend for children to become less and less active over time. Section 2 looks at how much physical activity is enough, presenting information from a report of the Council for Physical Activity for Children of the National Association for Sport and Physical Education. Section 3 describes the Center for Disease Control's guidelines for school and community programs to promote lifelong physical activity among young people. The guidelines are based on a premise that youngsters are more likely to develop physically active lifestyles if they are provided with physical activity experiences they enjoy and with which they can be successful. Section 4 discusses the current status of physical education in schools, noting that physical education is an entrenched component of American public education. However, exposure to physical education is uneven and declines rapidly as students progress through high school. (SM)