I think, it is a kind of game. Did u search about it on google?
http://www.slideshare.net/GamerSize . have a look at this site. May be it is a kind of a game with which we can burn our extra calories. It's just a wild guess. I might be wrong..
what does "go for the burn" mean?
To 'go for the burn' is also a phrase used by people who are exercising. It means to work hard enough that one can feel a burning sensation in the target muscles.