Exercise pool...?

[ragani]

I was thinking of an idea today (prompted by an article I read in Prevention) where a group of people could support each other in the effort to exercise by creating a competitive pool. By that, I mean it would be like a betting pool that each member puts in a small amount of money, and the one who exercises the most that month gets to keep the pool amount to treat themselves to a spa visit or the like. I am not sure the best way to go about it, but it would need some way for each member to track how much they exercise, and compare the results at the end. Also, perhaps a Pay-Pal account to collect the funds for the pool. I figure think this would need at least 4 people to make it cost effective.

Has anyone done something like this before?
Anyone have any suggestions or ideas on how to make this work?