Abstract: The paper is about importance of ergonomics, in development of devices such as continuous passive motion machine. Also its effect on joint mobilization is discussed. Today the ergonomics science has broadened to every day’s task right from spoon, hand tools, knife, chairs etc. Ergonomics is applied from industrial machine to daily work. It is the faith in ergonomics that has totally changed the design scenario. Continuous passive motion (CPM) therapy is normally use as first stage exercise in the postoperative treatment of joints in the first post orthopaedic surgery. After surgery passive range of motion helps to prevent joint stiffness, Deep-vein thrombosis (DVT), edema, soft tissue contractures, muscle fiber atrophy, contractures, and osteoporosis. It is important, however, to begin physical exercising of the knee immediately to restore strength and full range of motion after postoperative treatment by CPM.

Keywords: Ergonomics, Physiotherapy, Continuous passive motion, Knee Joint.