When I was 29, I could run 4 miles in heavy Army boots, and full military uniform with helmet, in 27 minutes. I told my US Army Company (I was the Company Commander, a Captain), if I couldn't beat 28 minutes (my MAX score for my age to get 100 points) during a physical fitness test we all had to take, I would buy all 200+ of them drinks on me at the NCO club.
I later heard that some of my soldiers thought I was a serious runner (which I wasn't, I was never athletic), and was cheating. So I thought OK, I'll handicap myself.
The morning of our Company run I sat outside on my Orderly Room steps after addressing my troops, took off the spit-shined Corcoron jump boots I usually wore, and put on a pair of brand new, never-before worn Quartermaster issue boots that my First Sergeant handed to me. My soldiers groaned at the sight, knowing how stiff and painful they were, without being broken-in.
And those were the new boots I ran in, on a blacktop road, and still did 27 minutes in 4 miles. Only 7 other of my soldiers out of over 200 came in ahead of me, all in their teens and early 20s. I didn't have to buy anybody any drinks. I really used to be that showy.
So what do you do when it all ends? And you can't do anything anymore? It sucks. You can tell people about what you USED to do, but who the Hell cares about that?