Stand in an upright position with a resistance band tied off behind you.
Lift your affected arm out to the side and up to a 90° angle to your body.
Bend your elbow to a right angle.
Maintaining good posture and shoulder blade control, rotate your forearm downwards from vertical to horizontal.
Your elbow should remain at a right angle, and your upper arm still.
Keep your posture straight and your shoulder blades back and down.
Slowly return to start position and repeat.
