I'm almost 69 and don't feel "old" or "elderly." In my head, I'm 30. But I can tell my body is beginning to change....a few more creaks and arthritis. But it doesn't keep me down.
I still mow, plow snow, exercise, and do some heavy duty work at home. I don't plan on aging into my recliner until I absolutely have to.
I see others my age who look and function like the very elderly. It may be genetics or medical issues.
Maybe I'm in denial or maybe I'm young at heart.
Aging is an individual thing and better than the alternative.