Created by the Robert Wood Johnson Foundation, Active Living Research (ARL) contains a wealth of resources designed "to support and share research that can promote daily physical activity for children and families across the United States...[with a] special emphasis on research related to children of color and lower-income children who are at highest risk for obesity."
The Community Preventive Services Task Force seeks to "identify population health interventions that are scientifically proven to save lives, increase lifespans, and improve quality of life." This site reviews the effectiveness of interventions related to increasing physical activity.
"The National Physical Activity Plan Alliance is a not-for-profit organization that is committed to insuring the long term success of the National Physical Activity Plan (NPAP). The Alliance is a coalition of national organizations that have come together to insure that efforts to promote physical activity in the American population will be guided by a comprehensive, evidence-based strategic plan."
"The Physical Activity Guidelines for Americans (PAG) provide science-based guidance to help Americans age 6 and older improve their health through appropriate physical activity. Developed with health professionals and policymakers in mind."