Physical activity among children and youth.

The positive influence of physical activity on chronic disease has been well established for the adult population. Much less is known about the relationship between physical inactivity and risk factors for coronary heart disease in children. It has not been clearly established how active children are, nor do we know the factors that determine physical activity patterns among youth. The purpose of this brief review is to describe different techniques used to assess physical activity that are consistent with the operational definition of physical activity. Descriptive information from the National Children and Youth Fitness Studies related to children's level of physical activity is provided which indicates that children are physically active. Nevertheless, it is suggested that the importance of regular physical activity should be emphasized to our youth to promote lifetime activity participation for long-term health and well-being.