By Roy J Shephard, MD, PhD, DPE, Professor Emeritus of Applied Physiology, Faculty of Physical Education and Health and Department of Public Health Sciences, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
By Roy J Shephard, MD, PhD, DPE, Professor Emeritus of Applied Physiology, Faculty of Physical Education and Health and Department of Public Health Sciences, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
