The MedX Rotary Torso is one of the five pieces of the MedX Core Spinal Equipment line. This equipment is often used for rehab. This equipment increases strength, flexibility, stability, and endurance. – all vital factors necessary for a healthy back. At Austin Fitness Trainers and New Orleans Personal Trainers we have all the MedX Core equipment plus full lines of MedX strength training equipment. The equipment and the protocol we use has contributed to our success working with those who have back problems