Stomach muscle builder

An apparatus to assist a user in building stomach muscles by performing situps on a horizontal surface with said apparatus, said apparatus comprising:

• (a) first and second anchoring means, each of said anchoring means having a front surface, a top surface, a bottom surface, an adjacent side surface, and an outer side surface disposed opposite said adjacent side surface;
• (b) spacing means to position said first and second anchoring means at a selected distance apart;
• and
• (c) attaching means disposed on the front surface of each of said anchoring means, said attaching means for releasably attaching first and second feet of the user to the outer working surface of said first and second anchoring means, respectively, to hold said first and second feet of said user relatively immobile, and to hold said first and second feet in a selected foot position which is selected from a first position wherein said first and second feet are disposed in a substantially horizontal plane, and from a second position wherein said first and second feet are disposed in a substantially vertical plane;
• said attaching means comprising first and second vertical channel shaped members mounted to said front surfaces of said first and second anchoring means, respectively, said vertical channel shaped members having vertical side walls;
• and first and second shoes having, respectively, first and second upper portion attached to first and second lower slide portions, said slide portions being releasably engageable with said vertical side walls to position said feet in the selected foot position.