Elbow flexion and extension
If this exercise causes numbness, tingling, or pain in your hand, ease off of the stretch. You should not have symptoms as you stretch. If you cannot back off enough so that you can do the exercise without symptoms, stop doing the exercise right away.
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Stand with your arms relaxed at your sides.
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With your affected arm, gently bend your elbow up toward you as far as possible.
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Then straighten your arm as much as you can.
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Repeat 2 to 4 times.