This report summarizes recommendations for encouraging physical activity among young people so they will continue to engage in physical activity in adulthood and obtain the benefits of physical activity throughout life. The guidelines are based on an in-depth review of research, theory, and current practice in physical education, exercise science, health education, and public health. These guidelines include 10 recommendations for school and community programs: (1) establish policies that promote enjoyable, lifelong physical activity; (2) provide physical and social environments that encourage and enable safe, enjoyable physical activity; (3) implement physical education curricula and instruction that emphasize enjoyable physical activity participation and help students develop knowledge, attitudes, motor skills, behavioral skills, and confidence to adopt and maintain physically active lifestyles; (4) implement health education curriculum and instruction that help students develop knowledge, attitudes, behavioral skills, and confidence to adopt and maintain physically active lifestyles; (5) provide extracurricular physical activity programs that meet the needs and interests of all students; (6) include parents/guardians in physical activity instruction and planning; (7) provide appropriate training for education, coaching, recreation, health care, and other school and community personnel; (8) assess students' physical activity patterns, offering counseling and referrals; (9) provide a range of developmentally appropriate community sports and recreation programs; and (10) regularly evaluate school and community physical activity instruction, programs, and facilities. (Contains 276 references.) (SM)