To whomever was asking about Zone- my husband did that when he was training for triathlons and it seems very sensible. I would stick to real food though, and not the Zone bars or whatever. I think he had to eat on schedule and it was a lot of work to prepare the food and have the right stuff purchased from the grocery store-but I was thinking about that. An analogy maybe-If I bought bad gas from a gas station and my car always ran badly every time I filled up, I would not buy my gas from there anymore. I guess that translates to me putting the right things in my body with thought and consideration.