Secure the center of the tubing in the doorjamb at chest level.
Engage abdominal muscles before beginning exercise.
Facing the door, hold one handle in each hand. Step away from the door so that there is tension on the elastic when your arms are extended forward. Pelvis in neutral position, with slight bend in your knees. Pull the handles so that your elbows form right angles as you squeeze your shoulder blades together. Bring your elbows back as far as you can, keeping your spine neutral. Slowly let your arms extend back to the starting position and begin your second repetition.