I was 55 when I had my knee scoped for a torn meniscus on the right knee. I had tolerated intermittent pain for six months before. During surgery they found a bone spur and debris under my kneecap so I got a threefer!. The first week was the hardest due to the stiffness and keeping the leg somewhat immobile. I went through about six weeks of PT including daily home exercises. Once I was back to normal I had stiffness in the mornings for the better part of a year. One day while mowing my yard I stepped in a hole and twisted my knee. After that I no longer had the stiffness. My primary MD said it probably loosened scar tissue and 14 years later I’m still doing OK. The key is the PT. Do it!