I don't know if she's a runner, but I know she's hardcore into yoga. A while ago she was on one of the late nite shows saying that's all she does as far as exercise goes.
I was also watching a show on VH1 about celebrity diets - Madonna as well as Gweneth Paltrow are on this diet (I forget what it's called) where they only eat food that originates within a certain radius of their houses. Weird, but they look hot, right?