i would ditch all that stuff before the cardio. just bump the pace up a lil with the cardio, then drop down to maintain the right heart rate. i personally dont like to do anything that stimulates my muscles before cardio and empty stomach..also if its ur breakfast why dont u just eat eggs instead of tuna. my first meal for cutting usually looks like this. 6 egg whites, half cup (measured dry) oatmeal, and a 40g protein shake. i like carbs in the morning.