Pilates that's performed on a specialized resistance apparatus is known as reformer Pilates. The added resistance challenges the muscles and builds strength and flexibility.
Reformers rely on a system of pulleys and springs that provide controlled resistance through each of the 500 original Pilates movements. The movements are performed in sitting, resting, kneeling, and standing positions.
Benefits of Reformer Pilates: Reformer Pilates helps train the body-specifically the core-and can improve muscle tone and posture. Reformer Pilates can also be useful for back injuries, since the machine helps properly align the spine while providing much needed support.