I'm going to win $250!!!!

At work we have decided to bet who could lose the most weight in the next 2 months. This is our way of finding the motivation to go workout, eat right and stuff like that. We put in $50 each and whoever loses the most weight by May 22nd with get the pot of money. I really want to win this bet because I need the money but I also want to loose a few extra pounds ( I need it just to make me feel better, isn't that bad!?!).