The side-lying shoulder blade squeeze is a gentle exercise for the muscle in the middle of your upper back (middle trapezius). You lie on your side with your head supported and your top arm resting on a pillow, then draw the top shoulder blade back toward your spine and let it go again. Because the pillow carries the weight of the arm, it is often used as an early step before exercises that lift the arm.

How to do the side-lying shoulder blade squeeze

Lie on one side on a mat or bed with your knees slightly bent and your legs stacked. Support your head with your lower arm or a pillow so your neck stays level.
Place a pillow in front of your chest and let your top arm rest over it, fully relaxed.
Slide your top shoulder blade backward, in toward your spine. The arm stays on the pillow and just rides along with the blade.
Keep that shoulder low and your neck loose while you squeeze.
Pause briefly at the end, then let the blade glide slowly forward to where it started. Repeat, then turn over and do the other side if your program includes it.

What you should feel

A small, steady effort between your top shoulder blade and your spine. The top of the shoulder and the neck stay soft.

Common mistakes

Pulling the arm back off the pillow instead of moving the shoulder blade.
Letting the shoulder creep up toward your ear during the squeeze.
Rolling your whole body backward to make the movement look bigger.
Rushing, so the blade flicks back and forth without control.

How often

A common starting point is 10 to 15 squeezes with a 3 to 5 second hold each, for 2 to 3 sets, once or twice a day. Your physio will adjust this.

Stop and check with your physio if

A sharp pain or a clunk in the shoulder while you squeeze.
Numbness, pins and needles or pain going down either 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.
Lying on the lower shoulder hurts and moving that arm a little forward does not ease it. Stop and try the seated version instead, or ask your physio.

From the clinic

This is a small movement, easy to miss in the video. Think of sliding the shoulder blade a few centimeters toward your spine rather than pulling the arm back. For the first few tries, it helps to have someone rest a hand on your shoulder blade so you can feel it move.

When this is easy, the same squeeze can be done lying face down with the arm hanging, as in prone scapular retraction, or sitting up, as in the seated scapular squeeze. After shoulder surgery, or if the shoulder has ever dislocated, check with your surgeon or physio before you start and ask which side you may lie on.

If you have had a hip replacement, get the go-ahead from your surgeon or physio before you try the side-lying shoulder blade squeeze. Lying on your side lets the top leg slide forward or drop across the lower one, and many surgeons ask you to avoid that for the first months after some operations. A pillow between your knees helps keep the legs apart.

Written and checked by the PocketPhysio editorial team. Last updated 2026-09-28.

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.

Side-lying shoulder blade squeeze