A therapy apparatus to restore range of motion to joints and limbs. The apparatus is useful for elbow joints and includes a beam on which the elbow joint rests. A tension cord extends through and beyond the length of the elongated hollow beam with a handle at the distal end of the tension cord to be grasped by the user. The proximal end of the cord is pulled by the user's other hand to rotate the elbow. A ratchet clamp forming a part of the beam retains the tension on the elbow. Since it is a ratchet clamp, the cord may be freely pulled in the proximal direction to impart more tension to the elbow, but to release the tension, the ratchet clamp must be disengaged manually. The beam has segments that are telescopically extendable and retractable to accommodate limbs of different lengths and for portability and storage.