23 and 1/2 hours: What is the single best thing we can do for our health?

A Doctor-Professor answers the old question "What is the single best thing we can do for our health" in a completely new way. 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.