DANCING, hoo boy. I probably had hypermobile joints even as a kid before the ballet when I was very young, but I sure did afterwards.

I lost dependably pain-free use of my foot at 43-ish (it got crushed under something)

Aaaaagh. And yeah, then the health problems when one part of your body is out of commission like that and the rest of everything is affected by it....dry bones in the valley indeed.