I have been using CK off and on over a couple of years. The thing that always stresses me out is on the days I exercise it wants me to eat the additional calories that I burned off in the gym. I work out pretty hard and this can mean an additional 400-700 calories. My daily target is 1350, which on most days I feel like is plenty of food. I am afraid to eat more than that plus I question whether I have really burned that much in the gym. I figure an hour of high intensity exercise is about 600 calories max. So my question to you is do you really consume those extra calories on the days you exercise? If you do, do you notice a difference when you don't?