Physical activity in childhood has a range of benefits, including healthy growth and development, maintenance of a healthy weight, mental well-being and learning social skills. It is particularly important for bone health, increasing bone mineral density and preventing osteoporosis in later life. Although there is only indirect evidence (compared with adults) linking physical inactivity in children with childhood health outcomes, there is strong justification for encouraging young people to be physically active.
(Department of Health, Chief Medical Officer,
At least five a week: Evidence on the impact of physical activity and its relationship to health, April 2004)