There were a couple of articles on Yahoo yesterday about living to 100, including the prophecy that more and more of us will and ways to help make it happen.
Do you want to live to 100?
Do you see yourself cycling until what age, then? What kind of cycling?
( by the way, if I'm living to 100 I certainly don't want to think of myself as "old" at 50. That would mean that I will spend almost half of my life thinking of myself as old, rather than middle-aged)
I hope that I never stop cycling. If my body rebels too much, maybe I will eventually ride a recumbent trike!