Actually, it doesn’t! WonderBack’s unique and novel design offers exclusive applications that are not offered with other products. Whether it is a foam roller, stability ball, or muscle poker gadget, WonderBack provides all the same benefits plus countless other, exclusive, applications. Additionally, when using WonderBack Pro your body is allowed to relax as you receive a self-stimulating massaging session. Unlike the other devices which require muscular strain and body balance to effectively, and safely apply, WonderBack Pro is relaxing and completely efficacious.