yes this is tru but dont take too many carbs or fast carbs like juice. oatmeal is a good thing to have 30min-1hr before workout. then cardio then protien.
(for me thow i use high amount of sugar right after work out with protein but im bulking up so we dont have the same goals.
some will tell you do cardio on an empty tummy with maybe some bcaa's. but if your goign to do lifting then cardeo i think a bit of oat meal would be a good idea before you start for energy.