Hi: I am 62 and very active. Had a bilateral TKR 5½ months ago. I am wondering if it's normal to still have soreness and stiffness after brief periods of inactivity (sitting, etc). I have worked hard to rehab, my PT said I passed the protocol faster than anyone he had before. I was cleared to start light weightlifting with my legs at 6 weeks. I have progressed well strength wise, am back to deadlifiting 300+ lbs for 6-8 reps with no pain. But I still have soreness and stiffness after - which does lessen/improves after a minute or so of walking. My surgeon is top notch and said I had no restriction as far as weightlifting (without going below parallel). Does it just take more time for the post-activity soreness/stiffness to not occur?