The present invention relates to prevent displacement along with the support of the back muscles of the body at the time of the sit-ups, promote the provision of sit-ups aid to facilitate the bending and stretching motion further advantage of the high repulsive force of made vinyl chloride. A sit-ups aid of the present invention 10 includes a rectangular laying the mat 20 having a predetermined size to be laid on a floor surface, a cylindrical backing mat 22 having a repulsive force that promotes sit-ups a back support storage bag 21 having stretchability said back against the mat 22 is accommodated, in the configuration, and laying the mat 20 and the back support storage bag 21 is detachably connected via the connecting means 28 take the means.FIELD 1
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