I too do this, use a cushion as my knees are not good and I haven't had the replacement ....just painful with PMR......it seems it must depend on the individual after knee replacement whether you can kneel or not......thank you for answering my question ...Beryl

My pain level after the TKR was bad. Why i was disappointed was i went into the surgery super strong. Worked out and had my legs very strong. Flexibility came slowly and the loud noises came from me as they pulled the knee back. The swelling has never returned to normal after 5 years. I find biking does the best exercise for me. Water therapy did not work, so i now know there is nothing to do but put up with it. I don't take pain pills because so many pills like aleve and ibuprofin kill off stem cells. I do bike 10 miles a day but whe cold weather hits its off to the fitness facility. Good luck to all who had this problem. No one ever told me about the downside. all i heard was how happy i would be. oh well, it is what it is.

@cobweb I must admit, before my first TKR I was in severe pain 24/7 so it was a huge relief to not be anymore. I had plenty of time before this one though to strengthen the surrounding muscles and help it, so I was doing pretty well. Because of that, I did not feel the huge relief I had after the first TKR. I am happy with it now though. I ride my recumbent bike about 30 - 35 minutes most days, around 6 miles, do my pool exercises, and also do gym equipment at my health club. NO KNEE PRESSES I was told by my ortho.
JK