Side lying dumbbell abduction trains the muscles that raise your arm sideways, mainly the middle part of the deltoid and the supraspinatus, one of the rotator cuff muscles. You lie on your good side with a light dumbbell in your top hand, rest the straight arm along your hip, and lift it until it is upright before lowering it again. Because you are on your side, gravity pulls hardest just as the arm leaves your hip, so the start of the sideways lift gets most of the work.

How to do the side lying dumbbell abduction

Lie on your good side on a bed or firm mat, head resting on your bottom arm or a pillow, legs out long with the knees slightly bent so you do not roll.
Hold a light dumbbell in your top hand and lay that arm along your side, elbow straight, with the weight resting on your hip.
Keeping the elbow straight, lift the arm up and away from your hip until your hand is right above your shoulder, pointing at the ceiling.
Pause there briefly. Your hips and shoulders stay stacked, without your body rolling backward.
Bring the weight down under control until the arm rests on your hip again, then repeat. Turn over and work the other side too if your program includes it.

What you should feel

Effort across the top and outer side of the shoulder, strongest as the weight leaves your hip and easing as the arm nears upright.

Common mistakes

Rolling your body back to swing the weight up.
Bending the elbow partway through to make the lift lighter.
Hitching the top shoulder up toward your ear.
Letting the arm drop onto your hip instead of lowering it.

How often

Many programs use 2 to 3 sets of 10 to 15 slow lifts with a light weight, 2 to 3 times a week. Your physio will adjust this.

Stop and check with your physio if

A sharp pain or a catch in the shoulder as the arm lifts, or pain, pins and needles or numbness that spreads down your arm or into your fingers.
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.
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

The first few inches off the hip are the hardest part, because the arm lies level there and gravity pulls across its full length. Choose a weight light enough to raise from the hip with a straight elbow every time, even if that means a small bottle of water. Lying on your good side also keeps your body weight off the shoulder you are working. When a sharp pain or catch cuts a set short, stop the next lifts just short of that spot and let your physio know. If you have high blood pressure, breathe steadily through every repetition and never hold your breath.

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. Weighted lifts usually come much later in rehab after a rotator cuff repair. If the arm cannot yet lift sideways without help, shoulder abduction with a stick and isometric shoulder abduction are the usual earlier steps. The standing versions of this movement are the lateral raise and shoulder abduction with a band.

If you have had a hip replacement, get the go-ahead from your surgeon or physio before you try side lying dumbbell abduction. 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 dumbbell abduction