I currently am doing cardio 2x a week max in the pm during bulking. My am fasted cardio is for cutting only, in an effort to preserve muscle loss. My question is: Do any of you use the treadmill at an incline for a good cardio routine? I have found that (it feels) if I crank the incline to 15% and then the speed to over 4.0, even if I hold on to the rails, I get a good burn in my hammys and calves + sweat....is this an efficient means of cardio?
I mean, as opposed to swing of the arms, etc at a faster pace but less of an incline?