A Doctor-Professor answers the old question "What is the single best thing we can do for our health" in a completely new way. Low fitness is the strongest predictor for death and exercise is the prescription. Dr. Mike Evans is founder of the Health Design Lab at the Li Ka Shing Knowledge Institute, an Associate Professor of Family Medicine and Public Health at the University of Toronto, and a staff physician at St. Michael's Hospital. He's curating resources and information for a range of common conditions at  http://www.myfavouritemedicine.com