get (someone or something) into shape
To return someone or something into acceptable condition or behavior, especially through direct, efficient, and practical means. The president won the election on his promise to get the economy into shape by overhauling outdated or inefficient legislation. What he really needs is a mentor who will get him into shape.
get into shape (or get someone into shape) become (or make someone) physically fitter by exercise.
get (yourself) (back) into ˈshape take exercise, etc. to become fit and healthy (again): After she had the baby, she started swimming every day, to get back into shape.
get/knock/lick somebody/something into ˈshape make somebody/something more acceptable or organized; improve somebody/something: Do you think you can lick this company into shape?