Which exercise?
I have been walking 6-6.5 miles at a 4.5 pace which takes about 70 min... or doing the step mill for 45 min. Which one is better for maximum calorie burning? I sweat a lot more on the stepper but walk at a very fast pace. Some times i am up to 4.7 for my walking pace. and I do walk outside to get the hills etc.
