Anonymous wrote:Yes and no. Genetics are important but lifestyle can hugely increase (or decrease) mobility.
FWIW, knee replacements can be beneficial but are also incredibly painful and require incredible amounts of PT afterwards. You are saying that your parents can barely walk a mile - that's very decent compared to my mother who can barely walk from the car to the ride-on cart at the grocery store anymore (due to back problems, the knee replacement and subsequent PT was a success). And more broadly, that's decent for anyone, let alone someone in their 70s with knee problems.
OP here. They can’t walk a mile. Like I think they can grocery shop but even that’s not easy anymore. My in laws are upper 70s and mid 80s and they are so much more fit and mobile than my parents. The contrast is staggering. I hope being more active in my 50s will lead me to have a better outcome. It’s also frustrating that they’ve just given up and don’t seem out more PT etc.