great cardio and great on my weak lagging muscles calves and hamstrings
latley ive put a few boards up at the front of my treadmill, i plan on making it as steep as 45 degrees or the most i can modify it. doesnt seem to hurt the machine either
what is the most you have modified your treadmills incline to be?
the more the merrier, i like the constant exercise my hams and calves get.
a stepper is too much quads and glutes and no calves