Knee range of motion (ROM) is one of the most important outcome in understanding the effective progression in rehabilitation process after anterior cruciate ligament (ACL) reconstruction. Early recovery of ROM not only has not negative effects as increasing effusion, emarthrosis, periarticular soft tissue edema and swelling but also can decrease morbidity of major intraarticular ligamentous procedures1 and allow the patient to a faster return to daily life activities. During the rehabilitation process patients are asked to achieve precise degrees of flexion and extension depending on the rehabilitation phase, moreover certain degrees of ROM are also required to progress in rehabilitation exercises.