get into shape
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 The president won the election on his promise to get the economy into shape by overhauling outdated or inefficient legislation.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 in(to) shape
To work to have good, robust health; to become strong or fit. Boy, I really need to get into shape. Ten years working behind a desk has given me quite a belly! Wow, Jim has really gotten in shape lately.