I am a new Crossfitter (4 months) and I have been following the Zone for about 2 months now. Initially I started on a 5-5-2-5-2 blk. I log my food on Fitday.com, and basically I found out I was not taking in equal cal as I was burning, and I was hungry all the time. I am in the military and we do morning PT, so naturally I was hungry right after, so I decided to add a 1 blk snack in the morning. So far, it seems to be working, I am maintaining my BW the same. Days when I don't work out, I take it out of my meal plan. I find it's all about how you feel and how you adjust. Of course, if someone is trying to lose weight then it's gotta be more strict and regimented, but for anybody else concerned about just getting the proper nutrition, then personal feel and adjustments are the way to go in my opinion. That is why I like that Fitday.com site. It is a great tool to log your food. It calculates your % of each macronutrient, gives you your cal intake, you can log in all your daily activities, as well as personal goals in terms of weight and such. I recommend it to everyone.