There's no doubt our exercise and diet habits have drastically changed since the hunter-gatherer days.  We now exercise in machines and have immediate access to high-carb, high-calorie foods. These changes, although convenient, are harming your health more than you think.  Today's guest, Mark Sisson, explains why and what to do about it.  Mark has been advocating for a healthy lifestyle rooted in the way our ancestors moved and ate since 2006 in his popular blog Mark's Daily Apple. He became a leader in the Paleo community, popularized his eating philosophy called The Primal Blueprint, and recently turned into a vocal supporter of the ketogenic diet.  He has published books about primal living and ketosis and created his own primal supplement line.  In this episode, we chat about why he switched endurance exercise for fun strength and power workouts, how he first got into paleo primal living, how to make the leap from the paleo diet to ketosis, and much more.