whats more beneficial :
12.0 incline @3.0 mph for 45 min holding onto the grips on the machine
or
3.0 incline @ 3.3 mph for 45 min not holding onto the machine.
Either way you look at it I keep my hr between 115 and 122 bpm. I know that Ill be burning more calories during the 12.0 incline but Im looking to burn as much fat as possible. Any comments?