I don't really care what people call me, but I know I am much fitter at 71 than I was in my 40's and 50's, when I was eating/drinking too much and taking no exercise. My daughters just accept that I am a bit eccentric because I choose to travel alone all over the world in order to snorkel on coral, and spend hours climbing steep Alpine paths. They didn't bat an eyelid when I went white-water rafting, or roller skating and they expect me to learn to ski now I live in a ski resort. My motto is that I will be very secure when I am dead, and now I want adventure.
My ex-husband was born elderly and bored me to death, which is why he is ex.
I don't make any effort to look young, though - I gave up make-up, contact lenses, hair dye, high heels, push-up bras, etc, when I retired to a remote region of France. However, I am told that my permanent slight tan (just through walking, I never lie in direct sunlight) and thick, wavy white hair look quite good, and I have now lost just over two stones through my walking, but as I never socialise it doesn't matter anyway.
My only concern is to keep healthy so I can carry on enjoying my wonderful life and I would like to see my great-grand-daughters grow up.