An exercise device for exercising of the abdominal muscles as well as in exercising the muscles of the upper torso, shoulders and arms while the back of the user is supported, elongated and stretched. Also provided herein are vectors and host cells comprising those nucleic acid sequences, chimeric polypeptide molecules comprising the polypeptides of the present invention fused to heterologous polypeptide sequences, antibodies which bind to the polypeptides of the present invention and to methods for producing the polypeptides of the present invention. The disclosed method provides prototype plastic injection molded parts within a twenty-four hour time period. The first contact opening stops on the silicon nitride hard mask and the second contact opening stops on the titanium silicide region. Additionally it comprises a frame construction into which said printed circuit board, keypad, display, reader for a detachable memory module and outer cover parts are mechanically coupled.