I said only that execise was PROBABLY more important. Seems there will be different personal experiences which lead us to prefer one over the other. Tsayonah had no luck with exercise (Paleo exercise? or the usual gym stuff?) and noticed a big improvement in her health when she switched to Paleo food. Perhaps her diet was in worse shape than her all-up exercise/activity regime. Think of people at the other extreme - Olympic athletes whose diets are way off Paleo, but whose physical achievements are among the world's finest. Really, my own way of thinking is that exercise is often under-rated because adjusting one's food intake to the Paleo model is easier than establishing one's activity/sleep/stretching regime to the P aleo. (I'm not implying that any subscriber to this list fits this model - I'm making a general statement, based on observations of people I have known closely, not over the internet) So, although exercise is under-rated in comparison to diet, I regard it as critical that the two go together. Some of the theory you'll find in Rob Faigin's book: Natural Hormonal Enhancement in which he shows how hormones are critical to our well-being and that both exercise and dietary affect hormone levels and profiles. I'd take it a step further. Paleo diet and Paleo exercise make sense only in a Pleistocene environment. This is not to advocate a return to the stone age; it means rather that we need to take an active interest in our physical environment, particularly degradation of that environment which affects our health. Keith