and while I'm certainly not quite as spry as I once was, I'm in remarkably good shape for someone who almost never exercises. I can still do a head stand if I want.
Can't the torn meniscus be treated surgically?
I also want to say that cataracts were the best things that ever happened to my eyes. In first grade I couldn't see the blackboard, even from the front row. Ever since then I've worn glasses or contact lenses. Until two years ago when the cataracts that had been slowly growing for ten years suddenly made the jump to needing surgery. Hoo boy! I see better than ever and it is so amazing to wake up in the morning and to be able to see!
I do have plans for my 97th birthday. There's a total eclipse of the sun on August 12, 2045 that I want to see, and I've already made my sons promise that if I'm still around, and I'm not so ga-ga I don't know my own name, they need to make sure I get somewhere along the path of totality.
While physical condition certainly matters a lot, I think mental attitude can be just as important. If people start thinking of themselves as "old" they will get that way a lot quicker, everything else being equal, than someone who doesn't think that way. But it is important to pay attention to your body. Please, ellenrr, try not ever again to "forget" you shouldn't be doing extraneous walking. At least not until you are fully healed.