Lie supine on section of bench furthest away from pads to each side. Position body so shoulders and elbows are aligned to fulcrum on each side. Place wrists or hands on under lower set of pads to each side of head.
Pull lever arms upward and toward each side of torso as far as possible by simultaneously rotating upper arms. Lower lever arms to original position and repeat.
Those with shorter forearms whose wrists do not make contact with pad would utilize Wrist Flexors as stabilizer to keep wrists ridged while hands move pads.