1. School of Kinesiology, Acadia University, NS B4P 2R6, Canada.
2. Division of Kinesiology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
3. Faculty of Medicine, Department of Family Practice, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.
4. Cardiovascular Prevention and Rehabilitation Program, Toronto Rehabilitation Institute/University Health Network, Toronto, ON M5T 2S8, Canada.