Mark Sisson runs the wildly popular fitness blog Mark's Daily Apple, and is the author of a number of books including the bestseller The Primal Blueprint. He's also one of the leaders behind the growing Paleo movement.
Despite running a fitness and health business, Mark Sisson also finds the time to stay in a shape that would be the envy of anybody half his age. And he seems to enjoy every minute.
How is it possible? In this interview he shares his secrets.