Given that you were dealing with a bad knee for 20+ years, you probably need more time for it to get to 0. I would also think that having your hip replaced can only help.
Walking heel to toe, and taking a longer stride, if you can, can help gently stretch the back of the leg and improve extension over time.
In the early months I would be sitting on my couch with my legs up on an ottoman in front of me, and I would pushed the back of my knee down towards the couch. I didn’t use a rolled towel anywhere, just my leg, the couch and the ottoman, which was actually a couple of inches lower than the couch.
But I hadn’t really had any issues with extension before surgery, other than being in my 60s and not the least athletic. It wasn’t perfect, but it didn’t bother me and I didn’t even know what extension was until after my surgery when my surgeon kept checking it. I was never worried about my extension, it was my bend I was very concerned about.
Walking heel to toe, and taking a longer stride, if you can, can help gently stretch the back of the leg and improve extension over time.
In the early months I would be sitting on my couch with my legs up on an ottoman in front of me, and I would pushed the back of my knee down towards the couch. I didn’t use a rolled towel anywhere, just my leg, the couch and the ottoman, which was actually a couple of inches lower than the couch.
But I hadn’t really had any issues with extension before surgery, other than being in my 60s and not the least athletic. It wasn’t perfect, but it didn’t bother me and I didn’t even know what extension was until after my surgery when my surgeon kept checking it. I was never worried about my extension, it was my bend I was very concerned about.