or stairstepper like on the treadmill say 4.5 speed nice lil steady jog for say like 30 minutes is that gonna burn more fat then running a faster speed for 30 minutes cause i keep hearing that lower speed is burning more fat and faster speed is just cardio i dont get it ,sorry if this is dumb question but any advice i would appreciate , i cant exactly remmeber the speed of the stairmaster but its like level 7 would be slower walk up then like 11