Proper form is essential with this ab-blasting move. Attach a rope or bar to a high-pulley cable and kneel down, facing the machine. Grasp the attachment and place it behind your neck in an overhand grip. Keep your hands close to your head and your elbows pointing to the floor. Using your ab muscles, exhale and pull the weight downward so that your elbows and chest move toward your thigh. Slowly return to the start position and repeat. TOP TIP: Use a lighter weight so that you focus more on the tension in your abdominals.

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