I don't like to think about age being so much a deterrent. I am 44 this year and I think Lisa is 42. I don't think in ten years I won't be hiking and running and dancing.
I am glad you did go do some boogie! I don't mind being a little sore - it means my body is stretching.
I do live in a state where I am regularly excited to see people in their 80s hiking out of the Grand Canyon. I want to be out there at one hundred. I know it won't be as effortless, but I can make smaller goals if I need to.