Hey John. I'm 54, but somewhat like Larry said, I don't feel a day over 62.
I think you'd be surprised to find that most here are [or are almost] old codgers like us.
A poll was taken a few years ago, [IIRC - memory's starting to go of course], and even I was surprised to see the age group 'creeping up' higher than I would have thought.
I think you're right about moving and flexibility and stuff.
I'll have to look some of it up on-line here while I'm couch surfing. Hahaha!