The Dynamax Runningpad folding treadmills with incline foldable treadmill Review treadmills fold up can be a great way to improve your fitness level, but they also take up a lot of space. Choose a model that can be folded flat to save space. Select a motor that has a power range of 2.0-2.5 horsepower if you intend to use it for walking, and occasionally a ru...