I am looking for the name of a movie that I saw about 15 years ago. It was about a foot ball (gridiron I think) team and a ballet/aerobic teacher. The football team are out of shape and are told to take these aerobic classes. Of course the head guy and the teacher fall in love. It ends with there being a "dance off" where the aerobic teacher and her class have to keep "dancing" against another class until the last one standing wins.