Ever tried to hike with a fat person?  Or even an out of shape person?  It's beyond frustrating how slow they go, how much they complain, how many breaks they take, and how easily they give up.  I've had to stop hikes a half mile in because they flat out couldn't handle it.  And they never do anything to get better, they just figure it's not possible.  It's pathetic that they can't walk a half mile uphill without getting dizzy and heat stroke. Yeah, fat people are so happy and healthy, my ass.