The single-arm barbell lateral raise is an isolation exercise performed with one hand gripping the center of a barbell that trains the lateral deltoid with a heavy stability demand. Because the bar is long, any tilt of the wrist tips one end down, so your forearm and rotator cuff must hold the bar level for the whole rep while the side delt lifts it. That balancing requirement forces a slower, stricter raise than the dumbbell version and punishes swinging. Lifters use it as a shoulder accessory late in a push or shoulder session.
What Muscles Does the Single-Arm Barbell Lateral Raise Work?
- Primary: Lateral deltoid (side delt)
- Secondary: Supraspinatus, anterior deltoid, upper trapezius
- Tertiary: Wrist flexors and extensors (forearms), obliques, serratus anterior
How Do You Set Up for the Single-Arm Barbell Lateral Raise?
Find the exact center of a light barbell and pick it up with one overhand grip so it balances level at your side. Set your feet hip-width apart with a soft knee bend and rest your free hand on your hip or a rack upright. Let the working arm hang with a slight elbow bend, the bar parallel to the floor, shoulder blades down and ribs stacked over your hips.
How Do You Perform the Single-Arm Barbell Lateral Raise?
- Set the bar level at your side with your wrist neutral and your elbow bent a few degrees.
- Raise your arm out to the side in a slow arc, leading with the elbow and keeping the bar horizontal.
- Stop when your hand reaches shoulder height and the bar sits level in line with your shoulder.
- Hold the top for one second, squeezing the side delt while checking that neither end of the bar has dipped.
- Lower under control over two to three seconds along the same arc until the bar hangs at your thigh.
- Pause at the bottom without letting the bar rest against your leg, then begin the next rep from the same level position.
What Are the Key Form Cues?
- Lead with your elbow, not your hand: the elbow should stay slightly higher than the wrist throughout the lift.
- Pour from a jug: tip your thumb a fraction downward at the top so the delt, not the front shoulder, finishes the rep.
- Keep the bar parallel to the floor by gripping its center hard and locking your wrist through the arc.
- Push your shoulder down away from your ear as the arm rises so the trap does not shrug the bar up.
- Brace the obliques on the opposite side against the load rather than letting your torso lean away.
What Are the Most Common Mistakes?
- Using a bar too heavy to raise without a hip swing: the momentum carries the bar past the delt's working range, choose a load you can pause at the top.
- Gripping off-center: one end drops, the wrist fights the tilt and the delt loses tension, mark the center of the bar with tape before the set.
- Leaning the torso away from the working arm: this shortens the lever and hands the work to the obliques, keep your ribs stacked over your hips.
- Raising above shoulder height: the upper trap takes over and the humerus can pinch the rotator cuff under the acromion, stop at shoulder level.
- Dropping the bar on the way down: the eccentric is where the delt is loaded most, lower over two to three seconds every rep.
What Are the Best Single-Arm Barbell Lateral Raise Variations?
- Dumbbell lateral raise: removes the balance demand so you can load heavier, and is where to learn the arc.
- Cable lateral raise: keeps tension on the delt at the bottom of the rep where a free weight goes slack.
- Leaning single-arm lateral raise: hold a rack upright and lean away for a longer arc at the bottom.
- Landmine lateral raise: the bar pivots from the floor, giving a fixed arc for irritable shoulders.
- Seated single-arm barbell lateral raise: sitting removes leg drive and makes swinging almost impossible.
How Do You Progress the Single-Arm Barbell Lateral Raise?
- Add 2.5 pounds to the bar once you finish all sets at the top of the rep range with the bar level on every rep.
- Work from 10 reps per arm up to 15 before adding any load.
- Add a fourth set per arm before the next weight jump.
- Add a two-second pause at shoulder height, then a three-second lowering phase, before returning to a normal tempo at a heavier load.
How Should You Program the Single-Arm Barbell Lateral Raise?
Program the single-arm barbell lateral raise as an accessory after your overhead press, two times per week on push or shoulder days. Perform 3 to 4 sets of 10 to 15 reps per arm, resting 45 to 60 seconds between arms or alternating arms without rest. It complements a rear delt raise in the same session so both sides of the shoulder are trained. Start each set with the weaker arm and match its reps.