Stand up straight with one end of a resistance band placed firmly under your foot.
Hold the other end of the tensioned band in your affected hand with your palm facing backward.
Keeping your arm by your side, slowly bend your elbow, pulling against the resistance of the band.
Stop this movement when your elbow is at 90 degree.
Control the movement as you lower your arm back down to the start position.
Pause, and then repeat.
