Yep, first thing I thought, too. I'm terrified of age-related degeneration, so I try to stay active and mentally alert, just like my father did. He got out and played golf every chance he had, did duo-lingo to try to learn to speak Spanish, played bass in his church band, kept working even though he didn't need the money... and still got Alzheimers. Now he can't drive, can't be trusted to go out and take a walk by himself, can't even work the TV, so all he can do is sit and watch DVD's that my mom changes for him - at least while she still can.

I'm still going to try to fight it for myself, though.