Paul Ryan workout photos roasted in David Letterman's Top 10: 'Flaccid smirk,' 'dumbbell'

Paul Ryan's not just the Republican candidate for Vice President. He's also a fitness junkie. And David Letterman had a little fun with some pictures Time released yesterday from a photo shoot Ryan did last year for the magazine's 2011 Person of the Year issue.

The goofy workout photos were meant for a good cause: encouraging healthy habits and promoting the P90X workout plan (also supported by Michelle Obama). But they're definitely not Presidential.

Letterman's "Late Show" writers imagined what might have been going through Ryan's mind when the pics were taken. It's funny stuff: