Here's a screen shot from a video featuring animals from Sea World in San Diego getting some exercise and eating better in the new year. I first saw it via ESPN's SportsCenter, where the clip of a walrus doing push-ups and sit-ups was one of their "top plays." The full video, available via CNN.com and titled "Walrus does sit-ups, can't reach his toes," also features a host of other animals, including these pigs who are eating some fresh fruit. (Sorry, but I can't figure out how to set up a link to the video itself at this point. I'll keep working on it). I assume that portions of this video footage (which includes a dog jumping rope as well) will appear all over the nightly news as the oddball final segment in the next couple of months.
By the way, there is another excellent clip of a walrus doing situps here