Sling therapy is a therapeutic modality used postoperative in order to decrease stiffness and improve range of motion following the procedure.In sling therapy patient's leg is placed in a standard tubular bandage that is suspended from a cross brace fixed to the bed while lying on their back . Unlike CPM, the use of sing therapy allows the patient to perform active knee flexion and extension with their leg suspended, minimizing gravity's resistance. By actively mobilizing the joint using their own muscular strength instead of outside forces like in CPM studies show that there are clinically relevant benefits. The use of this modality is convenient and easy to set up in a hospital setting along with being less expensive than the CPM machine. This treatment should be incorporated with traditional physical therapy in the postoperative acute setting.