Lie on bench and grasp bar with narrow overhand grip. With arms extended, position bar over forehead.
Lower bar by bending elbow. As bar nears head, move elbows slightly back just enough to allow bar to clear around curvature of head. Extend arm. As bar clears head, reposition elbows to its former position until arm is fully extended. Repeat.
With arms fully extended, shoulders can be internally rotated between repetitions as needed to allow for relative release of tension in muscles.