J Phys Act Health. 2011 Mar;8(3):436-44.
The impact of dog walking on leisure-time physical activity: results from a population-based survey of Michigan adults.
Reeves MJ, Rafferty AP, Miller CE, Lyon-Callo SK.
Source: Dept of Epidemiology, Michigan State University, East Lansing, MI, USA
Fuente: Grupo de educación sanitaria y educación para la salud PAPPS