Best Folding Treadmills Running a few miles from your couch is one of the best things you can do for your health. The treadmills that fold let you run at your own your home. If you are a athlete, zack foxworth select a treadmill that has a maximum speed of 12 mph. If you love exercising uphill, choose a model with an incline. 1. NordicTrack Commercial 2450 T...