Stand up straight with a resistance band tied in front of you above head height.
Hold the other end of the band in your arm to be exercised.
Gather up some tension in the band until your arm is straight out in front of you, slightly higher than head height.
Lengthen your neck and gently tense your abdominal muscles.
Keeping your shoulders facing directly ahead, pull your elbow into your side.
Start this movement by pulling your shoulder blades back toward one another, and then bend your arm.
Control the movement as you allow your arm to straighten back out in front of you to the starting position.
Repeat.