Since you did not have complete total knee replacements or repair, you returning to walk nine holes will be much sooner. That is usually dictated by the surgeon, procedure performed, terrain involved and just making enough progress with the PT first and foremost. Yes, it is imperative, especially with knees that you listen and follow the instruction given to you by the PT. You will be back walking and posting up on those in no time. Might get some yards back too!