Abstract: An exercise apparatus for use in developing abdominal muscle. The exercise apparatus includes a supporting structure adjustably mounted on a platform and a lever structure mounted on the upper end of the supporting structure for pivoting about a horizontal axis. The lever structure has a first arm which is connected to a handle and a second arm which supports an impact member such as a medicine ball. The exercise apparatus is used by an individual by standing on the platform and pulling the handle toward his or her chest. The individual then pushes the handle away from his or her chest which causes the impact member to swing toward the individual's abdomen. The supporting structure is adjustable so that the impact member can be positioned to strike the abdomen of individuals of different height.