Position the bar at your upper chest height, put a 4-6" block under it. Place the bar on your shoulders and trapezius behind your neck. Grip the bar with your hands slightly wider than your shoulders. Stand with the balls of your feet about 8 inches apart on the block. Raise the bar from the supports and keep your knees straight throughout the exercise.
Lift your body up as high as possible onto your toes.
Hold this position for a moment and return to the starting position.
