Primary Muscle Group: Abs
Attach a rope to an overhead pulley. Kneel down and grasp the rope with both hands. Now holding the rope in front of your forehead, bend and curl downward, rounding your back, bringing your head to your knees and feeling the abdominals crunch together. Hold the peak contraction at the bottom, then release and come back up to the starting position. Make sure the effort involved is made with the abs. Don’t pull down with the arms.