I did not realize how important this was- as my knee hurt so badly fully extended. I ended up having to have an MUA at 11 weeks (manipulation under anesthesia) as scar tissue had built up so much, hindering extension and flexion. If and when I have my second knee done, I will be reevaluating all that I do. I thought I was following post-op instructions and doing as much physical therapy as recommended.
Best wishes.