The general rule is that healthy, athletic elders are about as rare as hen's teeth. So statistical studies are almosr meaningless.

But there is some applicable biology that gives an insight to what is happening to us. What no study has done or, in my opinion, can do, is tell us how rapidly changes occur. That is variable based on many factors impacting our mind and body in for the most part unknown ways, in detail.

We elders are already so far out of thegeneral population others don't quite know what to do about us.

So, keep up the good attitude; keep pushing hard and let others benefit from your leadership.