Oh, how we love fitness jokes. And this little snippet from The Office that makes fun of everything from protein powder to Pilates to the hamstring curl machine? Well, we adore. And had to share. After all, Jim's right: nothing says manliness like a thigh-curl contest... After that display of hilarity and improper form, we're going to go ahead and agree that it IS all about the core. Who agrees with us? And who wants to see Jim hamstring curl it out, too? —Jenn