Granted some have physical problems that kind of render them old. But some of us, Im 76, are ticking right along. I have never been in a hospital or had an operation. With a some minor exceptions I dont feel much different than I did 25 years ago. I normally ride somewhere between 2 and 3 thousand miles a year, which does not include the 4 or so coldest months of the year. As I have stated in other threads on this forum, I contribute my good health to the fact I stay active, and mainly because I bike. I fully believe it is what keeps me young. I also believe if you set you rust.