Is physical activity in middle-income countries driven by necessity or choice? Exploring the roles of motor-vehicle ownership and socioeconomic status on transport-based physical activity in Cuernavaca, Mexico, and Chennai, India.

Deborah Salvo (Washington University in St. Louis, The University of Texas at Austin)

D. Adlakha (Washington University in St. Louis)

Aaron Hipp (University of North Carolina)

Ross C. Brownson (Alvin J. Siteman Cancer Center, Washington University in St. Louis)

Michael Pratt