Lie on decline bench with narrow overhand grip on barbell. Position barbell over shoulders with arms extended.
Lower bar by bending elbows. As bar nears head, move elbows slightly back just enough to allow bar to clear around curvature of head. Extend arms. As bar clears head, reposition elbows to its former position until arms are fully extended. Repeat.
With arms fully extended, bar can be brought back over shoulders. Shoulders can be internally rotated between repetitions as needed to allow for relative release of tension in muscles. Either straight barbell or EZ barbell can be used.