Lie supine on section of bench nearest pads to each side. Position body so shoulders and elbows are aligned to fulcrum on each side. Place wrists or back of hands on under upper set of pads to each side.
Pull both lever arms back and down as far as possible to each side of head 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 Extensors as stabilizer to keep wrists ridged while back of the hands move pads.