Just keep doing what you always have as long as you feel like it.
I am lucky--I'm 62 and i feel like a kid, I don't go to the doctor, never worn glasses, no aches or pains, ride my motorcycle all summer, eat what i want--and I ain't as fat as most of my pals!
Don't stop to think about your age--you can become obsessed.
And...
I DO NOT get the "senior coffee" at MD's (or eat that crap, either), nor do I accept senior discounts.
It's a mind game, kid.
Gotta keep that tropical state of mind!
Mahalo!!!
Tim