How many steps/day are enough? For older adults and special populations

Catrine Tudor-Locke, Cora L Craig, Yukitoshi Aoyagi, Rhonda C Bell, Karen A Croteau, Ilse De Bourdeaudhuij, Ben Ewald, Andrew W Gardner, Yoshiro Hatano, Lesley D Lutes, Sandra M Matsudo, Farah A Ramirez-Marrero, Laura Q Rogers, David A Rowe, Michael D Schmidt, Mark A Tully, Steven N Blair
International Journal of Behavioral Nutrition and Physical Activity 2011, 8:80 (28 July 2011)