When can I bend my knee after surgery? | Total Knee Replacement Surgery in Jaipur | Jaipurjoints At first, moving your knee and improving your range of motion may seem impossible. The good news is, IT’S NOT! A research study published in 2015 evaluated the outcomes of 145 people who participated in resettlement after their total knee replacement. This study showed us that considerable improvements in range of motion are possible up to 12 months post-surgery. However, after 12 months these individuals stopped seeing significant improvements, so we need to focus on improving range of motion early on in your recovery! At this point, you might be wondering: How can I do this? Myth: Bending of the knee or sitting on the floor is difficult even after the replacement surgery also. Fact: I don't know who has spread this, Everyone has doubts that it is difficult to bend the knee after the replacement, but it's not so true. The facts of this point are that it depends mainly on the quality of the surgery, the prosthesis used, and post-operative rehabilitation. Many types of prostheses allow the same range of movements as the normal joint.