A device for exercising abdominal muscles comprising a platform having an upper surface and a lower surface adapted for omni-directional motion, a pair of generally longitudinal limb supporting areas positioned on said upper surface, a pair of lateral hand grips each of said pair extending from the upper surface of the platform and disposed in opposed relation laterally and outwardly from one of said limb supporting areas, and a front hand grip extending from the upper surface of the platform and disposed generally forward of the limb supporting areas. Methods for using this device are also disclosed.