NordicTrack treadmills includes a well-known line of commercial and personal home workout machines. They have quite a wide assortment of treadmills and elliptical machines perfect for walking or running workouts. It has been found that walking exercise is a great way to get in shape. Ask any long distance runner on the brutal pounding their legs bear from running on concrete. There are many upsides and downsides with the debate of outdoors running and running on a padded treadmill machine. NordicTrack treadmill machines have numerous upgrade features which we will discuss.