Thanks to Science Guy for hooking us up! Here's Fitocracy, the social game you play to level up your fitness.
It's pretty much a way to log your workouts, and get "points" that level you up. As you level up, you get quests (that challenge you to do progressively harder things and give you more points). It's basically an RPG for your fitness.
Yes, you can be lame and cheat and say you did a thousand push ups. But really, only you lose, cause your body will show it. And the really fit people will just hate on you harder. So don't be lame!
If you are interested, go to the invite link below, create a profile, then search and join the "York Muay Thai" group :)