I'm really not quite sure what to say about this, except should I ever run for public office, I will NOT be replicating Romney's example here
Showing yourself running, sweaty and sounding a little out of breath strikes me as a funny idea-- though it does demonstrate cojones
I am tempted to wonder whether, since Romney always gets tagged with the "looking too perfect" line, maybe this is a way of shaking that perception up.
Or maybe he's subconsciously really worried about Mike Huckabee-- he's a marathon runner, and he seems to be running rather better in the polls these days, too. He's come down on Romney hard over abortion, and came second at Ames, so who knows...