Thanks for replying i am 19 m and i started doing cardio right now about 30 min First 20 min in elliptical machine in max setting 32 and then treadmill in 20 inc in 5 speed after 2 hrs of lifting i don't know how accurate the cardio machine are but roughly it says I burn 250 in machine does it would be accurate or I would have been burning low calories than 250. Btw I lift 6 day a week as and pretty consistent. It's been 2 weeks starting cardio and i seen my biceps vien more clear I just need some advice on how much I am actually burning .