I'm gonna say uh alie i should say alie crumb who's um down the street from you at stanford would and in the psych department I think did that really interesting work it's a small effect which has been it's a very strong finding. Over a month if you have a different mentality about the opportunity to get exercise at your job that that could that could add up to losing a pound. If you individually feel like you can't achieve something you're not going to try, he says.