I had a TKR on my right knee on 6/11 and am progressing normally, I'm thinking. The main problem I'm having is a tightening of the muscles (I guess) around the knee. It drives me NUTSO!!! The minute I get up to walk, they tighten up. This happened following my patellar resurfacing surgery in '09 also. Has anyone experienced this and is it normal?? Also ~ any advice on relaxing those muscles??