1. Healthy People 2020. With Understanding and Improving Health and Objectives for Improving Health,2011
2. US Centers for Disease Control and Prevention. Summary Health Statistics Tables: National Health Interview Survey, Table A-14. Participation in leisure-time aerobic and muscle-strengthening activities that meet the 2008 federal physical activity guidelines among adults aged 18 and over, by selected characteristics: United States, 2014. http://www.cdc.gov/nchs/fastats/exercise.htm/.
3. Exercise and the cardiovascular system: clinical science and cardiovascular outcomes;Lavie;Circ Res,2015
4. US Department of Health and Human Services. 2008 Physical Activity Guidelines Advisory Committee report. http://www.health.gov/paguidelines/. Accessed Sept 1, 2011.
5. Executive Summary: Heart disease and stroke statistics-2013 update: a report from the American Heart Association;Go;Circulation,2013