Dumbbell lateral raises: the form guide

Dumbbell lateral raise: which muscle are you working?

The dumbbell lateral raise targets the lateral deltoid, the outer part of the shoulder. That's the head that gives your upper body its width. The other deltoid heads barely contribute.

Other muscles help out. The upper traps stabilise, the core holds your position, the forearm keeps the hand in place. This muscle group is small: there's no point loading it like a press.

• Lateral deltoid: prime mover
• Rear deltoid: brought in if you lean forward
• Upper traps: stabilisers, active when the weight is too heavy

This is an isolation lifting exercise. It complements heavy movements like the incline dumbbell press, which recruits far more chest and front delt.

How to do it: starting position and movement

Stand with your feet about shoulder-width apart, a dumbbell in each hand. Arms hang by your sides, palms facing your thighs. Chest tall, eyes straight ahead.

From this starting position, raise your arms out to the sides, keeping the movement in the lateral plane. Go up to shoulder height, no higher. Lower over 2 to 3 seconds, without dropping the dumbbells at the bottom.

Don't lock your elbows out, keep them slightly bent from start to finish. That angle stays constant: if your elbows open and close, you turn a raise into a pressing movement.

In the gym, nine lifters out of ten go too high and swing the weight up with their legs. Cutting the load in half fixes both problems in a single session.

Three things keep the movement honest: no hip drive, no shrugging, and a path that stops at horizontal. If you have to lean back to get your arms up, the dumbbells are too heavy.

Standing, seated or on an incline bench?

Standing dumbbell lateral raise

The standing version is the most common. It lets you handle slightly more weight and change tempo easily. The downside: cheating is easy, a small body swing is all it takes to finish the set.

Seated dumbbell lateral raise

Seated on a bench, back straight, you take the legs out of the equation. The lateral deltoid works on its own. Expect to drop 2 to 4 kg compared to standing, that's normal.

On an incline bench

Lying on your side on a bench set to 45 degrees, the tension shifts. The muscle is loaded right from the bottom of the movement, exactly where the standard lateral raise is easiest. One arm at a time, with a light dumbbell.

What weight should you use for dumbbell lateral raises?

The question comes up constantly: what weight for this one? Ballpark figures from the gym floor: 2 to 5 kg for a beginner woman, 4 to 8 kg for a beginner man, 8 to 12 kg after a year or two of training. Past 14 kg, form almost always falls apart.

The test is simple. If you can't hold 12 clean reps with a clear stop at horizontal, the weight is too heavy. Move up in 1 kg steps, not 5.

• Hypertrophy: 3 to 4 sets of 12 to 20 reps
• Rest between sets: 60 to 90 seconds
• Frequency: 2 shoulder sessions per week

Dialling these numbers in to your own level takes time when you train alone. Our programmes built around your profile set your sets, loads and progression for you, week after week.

Try it for 14 days

Dumbbells or cable: which one?

Both work. The difference is the resistance curve. With dumbbells, there's no tension at the bottom and the most at horizontal. On a low cable, it stays constant through the whole range.

In practice, keep dumbbells as your main movement and add the cable at the end of the session. Both build the lateral deltoid, but together they cover the full range.

Common mistakes and variations

The first mistake is the weight. The second: raising your arms above shoulder height, which hands the work over to the traps. The third: bending then straightening your elbows mid-set.

To mix things up, change the hand rotation. Thumb tilted slightly down isolates the lateral delt more; palm up shifts the tension. The front raise, on the other hand, lifts the arms in front of the body and works the front delt: it's a different exercise, not a substitute.

The library of filmed exercises shows every variation on video, which beats vague descriptions when you're already under the bar.