And as for the book "being an application of the paleo diet to an overwhelmingly CW approach to athletics", I know what you mean. I read the book three years ago and I still struggle with that concept today, although I won't go entirely into why at the moment. Regardless, the point I keep in mind is one I made in my first post...if you want general fitness you can easily forego a lot, if not ideally all, of the otherwise taboo foods Cordain permits within the guidelines of the book. As I said, I feel by and large endurance athletes (again, those pushing past the two-hour mark) need more carbohydrate. And while I may get some flak for saying so the easiest sources of carbohydrate are clearly those not permitted on a more strict Paleo or Primal nutrition plan.