hey guys i was just wondering for those of you who have used these two or even just clen , what`s the best fat burning results youve got when using a certain type of cardio i.e. slow cardio, medium, or HIT

at the moment im doing about an hour of walking after my workouts at 4.0mph but im thinking im not taking advantage of the temeperature raising effects of clen. However walking burns less muscle and more fat so the idea is to keep as mch muscle as possible obviously.
anyone ?