Muscle Group: Abdominals
Attach a rope to an overhead pulley. Go down on your knees and grip the rope with both hands.
Keeping the rope in front of your forehead, bend and curl downward, rounding your back, bringing your head to your knees and crunching the abdominals together. Hold the crunch at the bottom, then in a controlled manner come back up to the starting position. Make sure you pull with the strength of your abs, it’s easy to cheat with your arms.