1. U.S. Department of Health and Human Services: Physical activity and health: a report of the Surgeon General. 1996, Atlanta: Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion
2. World Health Organization: Global Recommendations on Physical Activity for Health. 2010, Switzerland: World Health Organisation
3. Department of Health and Ageing: National Physical Activity Guidelines for Adults. 1999, Canberra: Australian Government
4. U.S. Department of Health and Human Services: 2008 Physical Activity Guidelines for Americans. 2008, Washington D.C: Department of Health and Human Services
5. Mottola MF: Exercise in the postpartum period: practical applications. Curr Sports Med Rep. 2002, 1: 362-368.