clen works but it is tuff on your heart .. i have prob used it to much and have ditched it .. if u insist use it with t3 and cycle it 2 weeks on and off use benadryl to get your recpetors st8 inbetween ...u can do cardio and should .. u will be hungry but prob a little less then usual.. atleast in my case but i can eat like a horse so who knows..last 2 questions cant help u with .. not sure