1. Andersen LB, Schnohr P, Schroll M, Hein HO. All-cause mortality associated with physical activity during leisure time, work, sports, and cycling to work. Arch Intern Med. 2000;160:1621–8.
2. US Department of Health and Human Services. 2008 physical activity guidelines for Americans: be active, healthy, and happy. Washington: US Department of Health and Human Services; 2008.
3. World Health Organization. Promoting sport and enhancing health in European Union countries: a policy content analysis to support action. Copenhagen: WHO Regional Office for Europe; 2011.
4. Federal Ministry of Food Agriculture and Consumer Protection, Federal Ministry of Health. IN FORM: German national initiative to promote healthy diets and physical activity. Berlin: Federal Ministry of Food Agriculture and Consumer Protection; 2013.
5. Finger JD, Tylleskär T, Lampert T, Mensink GBM. Physical activity patterns and socioeconomic position: the German National Health Interview and examination survey 1998 (GNHIES98). BMC Public Health. 2012;12:1079.