The Original Ab MatThe Original Ab Mat The Original AbMat. Still made with the highest quality that thousands have come to love and expect, the Original AbMat is essential for any core development program. The Original AbMat is an abdominal exerciser and core trainer designed for athletes that desire an all inclusive abdominal muscle group workout. Offering a variety of exercises that isolate the upper and or lower abs, as well as the oblique? s and lower back muscles.