My goal is to lose fat and one can agree that Cathe's circuit dvds will definitely do the trick...but I'm a little confused on the fat loss issue because I definitely can't do Drill Max on an empty stomach (I'll faint!) Doing cardio on an empty stomach will burn more fat (or so they say...) So I'll eat a banana beforehand...now, when high intensity exercise is done, your body uses carbs for energy...if none are available then it starts eating up muscle tissue....Am I right? So how can I lose FAT while preserving my MUSCLE TISSUE??? Please someone help me understand this!