What works depends on the therapist using the right treatment modality at the right time and the right mental attitude of the patient. For example, if the knee is quite swollen and usually painful, you might have to control the synovitis first then graudally improve the ROM and endurance then strength. Unfortunately, these days this approach is no longer valid based on who is paying the treatment, which is usually the third party payers. They are not too interested in the actual outcome for the patient but mainly interested in cost containment-return to work, which is being pushed by industrial rehabilitation experts and people aligned with the insurance companies. Hit me with your best shot.