The below link is to a Cycling Central article that reports that study of fit amateur cyclists aged 55 to 79 has found many are physically and biologically much younger than most people of the same age.
http://www.sbs.com.au/cyclingcentral/news/57675/serious-cycling-can-keep-you-young
Explains a lot about our Supervets!
I’m thinking, a great reason to head out on the bike.