Place a flat bench near a floor pulley.
Grasp cable bar with narrow or shoulder width overhand grip. Lie on the bench face up, with your head toward the pulley. Push the bar up until your arms are fully extended and the bar is over your head.
Lower the bar by bending your elbows, keeping your upper arms still. When the bar is near your face, move your elbows slightly back to let the bar go around your head.
Slowly extend your arms up, returning your upper arms to their vertical position as soon as the bar passes your head.