I'm new to this forum and 4 weeks post-op. I got a left TKR with a CONFORMIS custom knee. I seemed to be progressing very quickly the first three weeks, but seem to have stalled this week. This thread has reassured me that all is probably still ok. My extension is very near straight, and my flex is about 105. I can pedal an exercise bike all the way around, but slowly. I don't have a lot of pain, but my knee still feels very stiff. I kept my 2-1/2 year old grandbaby for 12 hours today so that was a knee workout of a different kind.