Isometric shoulder external rotation strengthens the muscles that turn your arm outward (rotator cuff, mainly infraspinatus and teres minor) without the arm moving. You press the back of your wrist outward into your other hand and hold. It is often used early in shoulder rehab, before the arm is ready to move against a band.

How to do the isometric shoulder external rotation

Stand tall. Bend the elbow of your sore arm to a right angle, keep the elbow close to your side, and bring the forearm in front of you.
Reach across with your other hand and place it on the outside of the wrist of the sore arm.
Keep your body still and push the wrist outward into your hand, as if turning the forearm out like a door opening. Your hand resists, so the arm does not actually move.
The effort should come from turning the arm, not from pushing the elbow away from your side.
Hold the push steady and keep breathing normally, then ease off slowly and relax.

What you should feel

Effort at the back and outside of the shoulder, sometimes spreading toward the shoulder blade. It should feel like work, not pain.

Common mistakes

Letting the elbow drift away from your side, which turns the push into a sideways lift.
Pushing so hard that the arm shakes or the shoulder hurts. Start gentle and build up.
Twisting your trunk toward the hand instead of keeping it still.

How often

Often 5 to 10 holds of 5 to 10 seconds each, once or twice a day. Start with gentle pressure and build up while it stays comfortable. Your physio may change the numbers or how hard you push.

Stop and check with your physio if

Pushing gives you a sharp pain or a catch in the shoulder.
You feel pain or tingling spread down the arm.
Pins and needles in your arm or hand that do not go away after you stop, or part of your arm or hand goes numb. Get medical advice the same day. If one side of your face or body suddenly goes numb or weak, or your speech becomes slurred or muddled, call emergency services, even if it goes away.
The shoulder aches more after the holds and is still sore a few minutes later.
A sudden pop or tearing feeling in the shoulder that brings sharp pain, new weakness or trouble lifting the arm. Stop and contact your surgical team the same day, or get medical advice the same day if you have not had surgery.
The shoulder feels as if it has slipped out of place, looks a different shape or suddenly locks so you cannot move the arm, or your hand turns cold, pale or blue. Go to an emergency department straight away, without driving yourself, and do not try to put the shoulder back in yourself.

From the clinic

This one needs nothing but your own hand, so you can do it standing at the kitchen counter or sitting at a desk. Some people tuck a small rolled towel between the elbow and their side. It gives the elbow something to stay against.

People often ask how hard to push. Start with a gentle press you could hold easily, then build up over the days if the shoulder stays settled. Do not hold your breath while you push, especially if you have high blood pressure. When the holds feel easy and pain free, a common next step is shoulder external rotation with a band, where the arm actually moves.

After shoulder surgery, including a rotator cuff repair, or after a shoulder fracture or dislocation, follow your surgeon's or physio's plan, and do only the movements and range they have cleared. Many plans allow only passive movement at first, where the arm is moved for you and its muscles stay relaxed. After a rotator cuff repair, pushing against resistance is usually held off for several weeks.

Reviewed by the PocketPhysio by VirtueLife expert physiotherapy team. Last reviewed 2026-09-25.

This page is general education, not a diagnosis or a personal treatment plan. If you have pain, an injury or a health condition, see a physiotherapist or doctor before starting new exercises.

Isometric shoulder external rotation