Once a patient has had ACL reconstruction surgery we recommend the first physio appointment within 3-7 days after leaving hospital.  This is to ensure your knee is able to straighten correctly- we call this extension.  Extension is usually limited by about 20 degrees after surgery, we work on getting the knee fully straight and fully extended within the first 4 weeks post-op.  Physio will usually be twice a week for the first 3-6 weeks depending on how swelling, movement of the knee and ability to walk is progressing.