@debbraw, @jillypooh : I read this ancient post/question while browsing for another subject. Anyway, for what it’s worth at this point in time: I had right TKR in Sept. 2018. Pretty decent recovery, nothing out of the ordinary, except it took months for me to get full extension. Flex was easy. PT basically forbade me from walking until leg was at 0 to prevent hip issues. Fast forward: I did lots of swimming, some recumbent biking, not too much walking for exercise. Suspended indoor pool membership end of May, transitioned to lots of walking. Hip bursitis! On and off. PT exercises did not help. Cortisone shot did, some. Mid July suddenly problems with gait. Could not take a full stride with my left (good!) leg. Legs measured, TKR leg is about 1/3” longer than the other. Not sure if it was like that before, but never had problems, so it MIGHT have been result of surgery. Working with orthotic inserts now, big improvement. I did have to do 2 weeks of specific exercises to make sure it’s not a muscle imbalance or tendon issue before being fitted for orthotics, but repeat measurement after those 2 weeks still showed the same leg length difference.