Place a barbell in a rack at about shoulder-height. Grip the bar with the hands about shoulder-width apart and the palm facing the ceiling. Dip under the bar to bring it off the rack letting it rest across the top of the shoulders so that the palms are facing the ceiling and the elbows are pointed straight ahead. Step back, keeping the back straight and tall and press the barbell directly overhead. Slowly return the weight to the shoulders and repeat for the desired number of reps.