I am having two total knee replacements with the first in 3 weeks towards the end of Jan or early Feb. I have also read what you are saying about causing the inflamation and will be more aware of it.I had to learn this over the summer/fall while rehabbing from my knee replacement. I was recovering very quickly early on, so I kept pushing the rehab. (A lot of that is because the exercises seem so ... tiny, as if how could this possibly be helping??) But it was just resulting in inflammation and basically stalling recovery. After adding two full days a week of rest, things started progressing again.