It's probably under 30, most of the ones who brag about good health and flaunt their disgusting fat rolls are.   If they surpass 30, they complain about bad knees and other condishuns that are in no way caused by their obesity because, you know, they've been fat their whole lives and their knees didn't hurt before, so clearly their obesity didn't cause their bad knees.  Must be genetics.  Especially since their fatass parents also have bad knees.