One measure of aerobic fitness is VO2max, which reflects your body's ability to take oxygen from air and put it in a form that helps you go. We noticed that one ranking of the best-ever VO2max scores featured five cross-country skiers in the top 10 results. So for our Winter Olympic special, host Shaun Francis and his team investigated what's so great about cross-country skiing. Including two Canadian Winter Olympians, Katherine Stewart-Jones and Emily Nishikawa, as well as McMaster exercise scientist Dr. Mark Tarnopolsky, an enthusiastic cross-country skier himself.

For links and insights with time codes, visit the Episode 103 web page.