Internal rotator strengthening exercise
For this exercise, you will need elastic exercise material, such as surgical tubing or Thera-Band.
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Begin by tying a piece of elastic exercise material to a doorknob.
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Stand or sit with your shoulder relaxed and your elbow bent 90 degrees (like the angle of the letter "L"). Your upper arm should rest comfortably against your side. Squeeze a rolled towel between your elbow and your body for comfort and to help keep your arm at your side.
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Hold one end of the elastic band in the hand of the painful arm.
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Rotate your forearm toward your body until it touches your belly.
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Keep your elbow and upper arm firmly tucked against the towel roll or the side of your body during this movement.
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Repeat 8 to 12 times.