Standing between the bars of a dip station, grip the bars with an overhand grip, keeping your elbows tucked in close to your body. Allow your bodyweight to hang so it is being supported by your arms and shoulders. Keep your hips straight and a flat back as you proceed to lean your chest forward slightly. Push down through your palms with your arms, lifting your body up until your arms are almost straight but being sure not to lock out your elbows. Lower your body by slowly bending your elbows, keeping them tucked in close to your body, inhaling as you do so. Continue until you feel a slight stretch in your shoulders. Pause, then push yourself back to the starting position focusing the tension on your chest and triceps and exhaling as you do so. Repeat.