Abstract: An exercise apparatus designed to rock on a ground surface and support a user in one of a plurality of positions with enhanced stability and user safety is provided. The exercise apparatus includes a pair of side plates coupled together by a plurality of rods and disposed on the ground surface, each side plate having an upper surface with a concave shape and a lower surface having a convex shape that contacts the ground surface and permits a lateral rocking movement of the side plate, the lower surface of each side plate having a pair of fins extending from opposing ends toward the ground surface. The user grabs any number of the plurality of rods to maneuver the side plates within the permitted range of lateral movement, thereby enabling the user to perform the variety of exercises in the plurality of supported positions.