Well at 80 I'd say you're doing great. I'm 68 and had both knees replaced last year. With a good surgeon and a lot of time in the gym I'm doing fine. I know that's not the case for all.

I'm curious though - are you suggesting the TKR has something to do with your sciatica? I thought sciatica starts with pinched nerves in the lumbar region. I've had it twice, many years ago. One time it resolved but the other time a disc exploded into the spinal canal at L-5, S-1. I had a laminotomy at S-1, L-5, and L-4 to remove the disc fragments and "sand down" arthritic spurs and make more room in the spinal canal. I didn't require fusion and I'm doing a ton of core work to keep it that way. So far so good. But damn, sciatica can be hell on the legs.

But I don't know why a TKR would affect or cause sciatica, unless your gait was affected and that in turn affected your lower spine. Can you clarify?

Thanks and keep up the good work. At 80, I'd say you're doing a hell of a good job!