1- Grasp an E-Z barbell with narrow overhand grip.
2- Then lie with upper back on a bench and flex hips slightly over chest with elbows bent approximately 90°.
2- Lower the barbell back, allow it to clear around curvature of head, until the upper arm is parallel to the floor.
3- Pull the barbell back up to the starting position, and repeat.
Tips and Advises:
1- Keep hips from raising up significantly.
2- Maintain the 90° angle at the elbows.
3- You have the option to lie upper back perpendicular on bench and flex hips slightly.