1. Grasp the chin-up bar using an underhand grip just outside of shoulder-width apart.

2. Pull your body up to the collarbone, driving the elbows down and back, feeling the shoulder blades coming together. Pause at the top for 5-10 seconds.

3. Slowly extend the arms and return to the starting position.

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Note: If performing the initial chin-up is too difficult, use a jump for assistance.