References
- Centers for Disease Control and Prevention. (2016). Secular changes in physical education attendance in U.S. high school students, 1991–2013. Retrieved from https://www.cdc.gov/healthyschools/physicalactivity/pdf/Secular_Trends_PE_508.pdf
- National Physical Activity Plan Alliance. (2016). National physical activity plan. Retrieved from http://physicalactivityplan.org/docs/2016NPAP_Finalforwebsite.pdf
- National Physical Activity Plan Alliance. (2017). The 2017 United States report card on walking and walkable communities. Retrieved from http://physicalactivityplan.org/projects/walking/Walking-report-card-FINAL.pdf
- National Physical Activity Plan Alliance. (2018a). The 2018 United States report card on physical activity for children and youth. Washington, DC: Author. Retrieved from http://www.physicalactivityplan.org/projects/PA/2018/2018%20US%20Report%20Card%20Full%20Version_WEB.PDF?pdf=page-link
- National Physical Activity Plan Alliance. (2018b). Promoting walking and walkable communities — Cross-sector recommendations from the National Physical Activity Plan Alliance. Retrieved from https://health.gov/news/blog-bayw/2018/03/promoting-walking-and-walkable-communities-cross-sector-recommendations-from-the-national-physical-activity-plan-alliance/
- National Physical Education Service. (1938). Twentieth anniversary — 1918–1938 National Physical Education Service of the National Recreation Associaton. Journal of Health and Physical Education, 9, 424–458.
- Physical Activity Guidelines for Americans Midcourse Report Subcommittee of the President's Council on Fitness, Sports & Nutrition. (2012). Physical activity guidelines for Americans midcourse report: Strategies to increase physical activity among youth. Washington, DC: U.S. Department of Health and Human Services.
- U.SDepartment of Health and Human Services. (2015). Step it up! The surgeon generals call to action to promote walking and walkable communities. Washington, DC: U.S. Dept of Health and Human Services, Office of the Surgeon General. Retrieved from https://www.surgeongeneral.gov/library/calls/walking-and-walkable-communities/call-to-action-walking-and-walkable-communites.pdf