Photo: Xurble, Flickr

Or, to be more specific, get fit the Superman way -- with Superman push-ups. Once you've mastered regular push-ups and are looking for a new way to challenge yourself, check out this novel new approach to an exercise that's as old as time. Doing Superman push-ups regularly will help you build enough strength and stamina to stop a speeding bullet -- or at least change outfits in a phone booth in mere seconds with nary a hair out of place.

Push-ups not your thing? Interval training will help you slim down in no time.