Happy Birthday, George
Don't be depressed. Look at it this way, I am almost 52 (no, sorry, 62, where the hell did those 10 years go?) and I was "playing" with some real nice young things during my recent job assignment in Beijin

.
You met my father. He is 87 and my Retirement Calculation is based on 105.
Keep doing those katas and mix in a few golf sessions a week, have green tea after lunch and California Merlot with your dinners, and a trip to China once in a while

. When I am 105 you will only be 112, still not quite old enough to get on the Guiness Book of Record but I will buy everyone here a round.
Have a great Birthday!!
Henry Thom