Dumbbell Seated Alternating Lateral Raise
- Target muscle
- —
- Equipment
- Dumbbell
- Body part
- Shoulders
- Type
- Strength
The dumbbell seated alternating lateral raise is a shoulder isolation exercise that targets the lateral (side) deltoid, the muscle that gives the shoulders their width. Performed seated with a dumbbell in each hand, you raise one arm out to the side at a time, alternating between left and right. Sitting removes momentum from the legs and torso, so each rep is cleaner and the side delt does the work.
How to do the Dumbbell Seated Alternating Lateral Raise
- 1Sit upright on a bench with your feet flat on the floor and a dumbbell in each hand, arms hanging at your sides with palms facing your body.
- 2Brace your core and set your shoulders down and back so your torso stays still throughout the set.
- 3Keeping a slight bend in your elbow, raise one dumbbell out to the side until your upper arm reaches roughly shoulder height.
- 4Lead with your elbow rather than your hand, and keep your wrist level so your palm faces the floor at the top.
- 5Pause briefly at the top without shrugging your shoulder up toward your ear.
- 6Lower that dumbbell under control back to your side, resisting the weight on the way down.
- 7Repeat with the other arm, alternating sides for your target number of reps.
- 8Once you finish your reps, set both dumbbells down with control.
Form tips
- Lead the movement with your elbow, not your hand, so the side delt stays in charge instead of the upper traps taking over.
- Keep a steady, controlled tempo on each arm; avoid throwing the weight up or letting it drop.
- Stop the raise at about shoulder height — going higher rolls the work onto the traps.
- Pick a weight you can lift cleanly through a full range; the lateral raise rewards control over heavy loading.
- Keep your torso upright and still between sides rather than leaning into each rep.
Common mistakes
- Swinging the torso or rocking to heave the dumbbell up, which uses momentum instead of the side delt and reduces the muscle's workload.
- Shrugging the shoulders toward the ears, which shifts the effort to the upper traps and can strain the neck.
- Raising the arm well above shoulder height, which moves tension off the lateral delt and onto the shoulder joint.
- Using too much weight so the elbow bends sharply and the rep turns into a partial cheat curl.
- Letting the dumbbell drop quickly at the bottom, wasting the lowering phase where much of the muscle tension lives.
Frequently asked questions
What muscles does the dumbbell seated alternating lateral raise work?
It primarily works the lateral (side) deltoid, the muscle on the outer shoulder responsible for shoulder width. Alternating arms while seated keeps each side isolated and reduces momentum.
Why do it seated and alternating instead of standing with both arms?
Sitting anchors your torso so you can't use leg drive or body sway to swing the weight up. Alternating arms lets you focus on one side at a time, which often improves control and mind-muscle connection.
How heavy should the dumbbells be?
Choose a weight light enough to raise smoothly to shoulder height without swinging or shrugging. The lateral raise is an isolation move, so most lifters do best with moderate weight and higher reps.
How many sets and reps should I do?
Three to four sets of 10 to 15 reps per arm is a sensible default. Since this is an accessory shoulder exercise, prioritize clean form and a full range over loading heavy.
Where should I feel this exercise?
You should feel it in the side of your shoulder (the lateral deltoid). If you mostly feel it in your neck or upper traps, you're likely shrugging or going too high — lighten the load and lead with your elbow.
