Okay so I am starting to pay attention to my heart rate during exercise but have a question.. Treadmill vs "pavement pounding" If I sustain let's say 145 bpm on a treadmill for 1 hour, will it be the same as 145 bpm for 1 hour outside on the pavement? I realize the numbers (HR) are the same but are the benefits different? I know the treadmill is helping me move and I have to pick up my own weight outside. How drastic is it though? I didn't pay attention in health class.