Ok, so I gave the one leg thing a try...not too encouraging, though the right leg went to a count of 43 and the left to a count of 32. That was rather fast counting.
I think I'll take @owasco's advice and start practicing Tai Chi :))
One thing in your favor: you haven't been pickling your brain in alcohol all these years. That trumps (damn it, can't use that word anymore) inheritance.
A count of 43? Sure you're a champion! I’ve no doubt you’ll still be entertaining and enlightening us in twenty years’ time. I have a friend of ninety-seven who’s sharp as a tack and hilarious with it.
As for Tai Chi, I gave it a go about five years ago. Much as I hate to let anything defeat me, I simply couldn’t get the movements right. I was equally hopeless at dancing and aerobics.