An exercise device is provided which rockingly interfaces with a support surface for performing a number of exercises and particularly is directed to performing reverse crunches. The exercise device includes a light easily foldable frame having a pair of laterally spaced curved rails movable by the action of the user's thighs when the user is positioned in a supine position on a support surface between the curved rails. The exercise device includes arcuate and rocker members which may be rotatably folded to provide a low volume storage mechanism space.
