Our minds don't seem to change, but our bodies sure do. Amazing how, after a certain age, each passing year puts a dent in actual physical capacity, but not in our perceived capability.
Never one to back away from any physical challenge, during a college boxing event I volunteered to spar an exhibition round with a world heavyweight contender at the time, Cleveland "The Big Cat" Williams. (I tried not to hit him too hard, didn't want to piss him off) :)
Now, even though I still _think_ I could kick someone's ass, I'm basically tickled pink when I get a full sheet of 3/4 plywood out of the truck by myself. ;)