Rehabilitation programs are as important in the overall success of total knee arthroplasty (TKA) as surgical technique and implant design. However, most rehabilitation protocols are based on empirical guidelines rather than on scientific facts and are seldom supervised by the surgeon. As a result, the variety of recommended programs is large and confusing in content, ranging from unsupervised walking to complete instruction in functional activities and specific exercises. Popular programs include active and passive range of motion (ROM) exercises, continuous passive motion (CPM) and isometric quadriceps strengthening.