I hit the gym at least 4x/wk I always do 30 minutes on the elliptical not only as my warm up but for my fat burning cardio. I due hiit with 3 mins at a moderate pace and 2 mins at an all out sprint. I was reading that your body doesnt really start burning fat until like 20-30 mins after you start your cardio as its using all your stored energy first. Now for the question ..With that theory in mind should I be doing my weight training first , will that use all my stored energy , and do cardio last ? Does it make a difference , or do I have this all wrong to begin with ?