Speaking of body fat, the Health Fair at work did a measurement a couple of years back.
I'm 5'11" @ 175#
They measured mine at 7% the lowest number of all 200+ employees, mine was the same as a competition bicycle rider and I'm muchhh bigger than this guy.
Perhaps all those years on the farm chopping wood and mending fences, chasing cows etc kept ol Doc Lean & not-so-mean