A treadmill can be a great cardio machine, but it can also take up serious real estate—that’s why a folding treadmill can be a great option. When it folds upright, you can stow your treadmill a closet or in a corner. A folding treadmill can accommodate any athlete, from someone just getting back into shape to a weekend warrior who is training for a marathon. The right folding treadmill for you depends on how you plan to use it—a low-key walker may not need the incline and speed capabilities of a varsity track star. And of course, as with any piece of exercise equipment, the best model for you is one that you’ll actually use (for something more active than a clothes rack).