One-Arm Incline Lateral Raise
The one-arm incline lateral raise has you lie on your side against an inclined bench and lift a dumbbell out to the side, targeting the middle deltoid without any help from your legs or torso to swing the weight up. Lying against the bench removes momentum almost entirely, which makes it one of the stricter ways to isolate that muscle and build rounder-looking shoulders.
Why it works
A standing lateral raise gives your body room to lean back or dip your knees to help launch the dumbbell, which takes real work away from the side delt without you noticing. Bracing against an incline bench pins your torso in place, so the shoulder has to lift the weight on its own with no assistance from body English, which is exactly what you want when the goal is isolating that one muscle rather than just moving the weight from A to B.
Set up
- Set a bench to roughly a 30 to 45 degree incline.
- Lie on your side against it, chest supported, with your top arm holding a light dumbbell hanging down.
- Keep a slight bend in your elbow, and let your bottom arm rest wherever it's comfortable for balance.
- Keep your torso pinned against the bench before the first rep.
How to do it
- Raise the dumbbell out to the side, leading with your elbow rather than your hand.
- Lift until your arm is roughly in line with your shoulder, no higher.
- Pause for a beat at the top, feeling the tension in the middle of your shoulder.
- Lower the dumbbell back down slowly, resisting gravity rather than letting it drop.
- Keep your torso flat against the bench the entire time, without twisting to help the lift.
- Complete your reps on one side, then switch to the other arm.
Form cues
- Elbow leads the raise.
- Stop at shoulder height.
- Torso pinned to the bench, no swinging.
- Slow on the way down.
Breathing: Exhale as you raise the dumbbell out to the side, inhale as you lower it back down.
Common mistakes
Raising the dumbbell above shoulder height.
Fix: Stop the lift once your arm is level with your shoulder; going higher shifts the work to your traps.
Letting the elbow straighten completely during the raise.
Fix: Keep a slight, steady bend in the elbow throughout, which keeps the load on the shoulder rather than the joint.
Using a dumbbell heavy enough that the torso lifts off the bench to help.
Fix: Drop the weight until your chest stays pinned to the bench for every rep.
Letting the dumbbell drop quickly on the way down.
Fix: Lower it over two or three seconds; the controlled descent is where a lot of the growth stimulus comes from.
How to program it
- Two or three sets of 12 to 15 reps per arm suits this well, since the side delt is a small muscle worked in isolation.
- With light loads and strict form, most people can train it two or three times a week without much soreness carryover.
- Do it after any heavier overhead pressing in your session, since fatigued delts make the strict form harder to hold.
- Add reps before adding weight; this exercise loses its point the moment momentum starts doing the lifting.
Safety notes
- Keep the weight light enough that your form doesn't break down before the set ends.
- Stop if you feel pinching at the top of the shoulder rather than pushing through it.
Exercise profile
- Force
- Push
- Mechanics
- Isolation
- Category
- Strength
Frequently asked questions
How many reps of the one-arm incline lateral raise should I do?
Twelve to 15 reps per arm for two or three sets is a good range, since this is isolation work best done with lighter weight and strict form.
Can I do a lateral raise without an incline bench?
Yes, a standing side lateral raise trains the same muscle, though it allows a bit more momentum than the incline version does.
One-arm incline lateral raise vs standing lateral raise, which is better?
The incline version is stricter and isolates the side delt more completely because your torso can't help swing the weight. The standing version is easier to set up and fine for most training days.
Why do I feel lateral raises in my traps instead of my shoulders?
That usually happens when the dumbbell goes above shoulder height or shrugging creeps in. Keep the raise capped at shoulder level and relax your traps as you lift.