Abstract
The effect of three methods of ROM exercise (I. ROM by a therapist, II. Prolonged stretching by a triangle block, and III. ROM by CPM) was studied by means of electromyography. Subjects of this study were 10 cases of TKR and 5 cases of arthroplasty of knee joint. The purpose of the ROM exercise on the early stage of postoperative patients is to relax of the muscle guard to avoid potential pain and to prevent the contracture. The method of ROM exercise by a therapist could not relax the muscle effectively. Prolonged stretching by a triangle block, when used for a long duration, produced pain and muscle guard. The best method is to use CPM machine in the early stage of postoperative patients.
