I was listening to NPR and a guy at some university hired a student to nag him, and then bet a friend that if he couldn't lose x amount of weight in an eight week period, he would pay that friend 500 bucks. He lost the weight.

Loss aversion thereapy works pretty well. How about for the next challenge, everyone agrees that if they don't lose a certain amount of weight or body fat, they donate x amount to charity?

Just a thought.... I'm about 5 lbs over what I'd like to be weight-wise, and the jeans are snug, so I would be in on this one.

Although... I'm biking three days a week for commuting and I think a lot of the weight is muscle weight... my body is definitely different this time at this weight than it was last time I weighed this amount. I seem stockier.