Shape Up is the eighth episode of the fourth season of Kids World's Adventures of Full House.
D.J. is too self-conscious to don a bathing suit for a pool party. Worried that she is out of shape, D.J. goes on a crash diet and nearly kills herself in the process. Though sworn to secrecy concerning the diet, Stephanie breaks her silence to rescue D.J. before she does any more damage to Ryan, Pooh, Alvin and all of themselves. Meanwhile, Michelle faces an entirely different weight issue when she overindulges on wedding cake.