Whether folding or non-folding treadmills are better depends on your needs. You can opt for a premium model, such as the NordicTrack Commercial Series 2450, which has the same features as many traditional treadmills. And if you don’t have a lot of space, a compact treadmill like the BiFanuo 2-in-1 Folding Treadmill is budget-friendly and is designed for both walking and running.