Prevalence of childhood obesity and health problems resulting from a lack of physical activity are in a position to increase in most developed countries. Scientific evidence of the relationship between physical activity levels and health problems resulting from inactivity not fully studied. Levels of physical activity for young people and teenagers are insufficient. There is little evidence of positive results in relation to interventions with children. In general, interventions achieved significant changes in physical activity levels of approximately 13% in moderate and vigorous physical activity. Most interventions are not significant in children although teenagers. In the case of children is effectively a direct influence over the type of physical activities that are proposed, with a high recreational component and multicomponent interventions course include families and supporting institutional campaigns. For adolescent interventions must also be multicomponent and focus on environmental intervention center to have some assurance of effectiveness.
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