There's always tai chi or yoga.

Age is no reason to not do stuff - here I am at 30, feeling verrrry old & trying to go back to school. Granted, it's age-motivated - I'm getting too old & have too many debts to be out of the work marketplace for too long, my current job is in jeopardy, so I'm gaining some mad accounting skillz while I'm still under 35... Every time I see someone's grandmother or great-grandmother on t.v. getting a tattoo, I get a great burst of inspiration & motivation to go out & do something. I usually just end up getting my hair cut, but it's still something.