Dumbbell One Arm Y Elevation
- Target muscle
- Deltoid Lateral, Deltoid Posterior
- Synergist muscles
- Infraspinatus, Teres Minor, Trapezius Lower Fibers, Trapezius Middle Fibers
- Equipment
- Dumbbell
- Body part
- Shoulders
- Type
- Strength
The dumbbell one arm Y elevation is a single-arm raise that targets the side and rear deltoids, lifting the arm up and out at roughly a 45-degree Y angle. The infraspinatus, teres minor, and the middle and lower trapezius fibers assist to control the shoulder blade. It's a light, shoulder-health movement that builds rear-delt and scapular strength and improves posture.
How to do the Dumbbell One Arm Y Elevation
- 1Stand or sit tall holding a light dumbbell in one hand, arm hanging in front of your thigh with a neutral or slightly turned-in grip.
- 2Set your shoulder blades down and back, brace your core, and keep a small bend in your elbow.
- 3Raise the dumbbell up and out at roughly a 45-degree angle from your body, forming a Y shape with your torso.
- 4Lead with your hand and lift until your arm is in line with the Y, keeping your thumb pointing up and slightly away.
- 5Pause briefly at the top while keeping the shoulder blade pulled down, not shrugged toward your ear.
- 6Lower the dumbbell under control along the same path back to the start.
- 7Complete all reps on one side, then switch the dumbbell to the other hand and repeat.
Form tips
- Use a light dumbbell — this is a control exercise, and going heavy turns it into a swing that loses rear- and side-delt tension.
- Keep your shoulder blade pulled down and back throughout so the lower and middle traps do the stabilizing, not your upper traps.
- Move slowly and deliberately, feeling the work in the back and side of your shoulder rather than the front.
- Keep your torso still and avoid leaning or twisting to help lift the weight.
Common mistakes
- Using too much weight, which forces you to swing the dumbbell up with momentum and removes tension from the delts.
- Shrugging the shoulder toward your ear at the top, which shifts the work to the upper traps and can strain the neck.
- Lifting the arm too far in front or straight out to the side instead of holding the 45-degree Y angle, which misses the target muscles.
- Leaning or rotating your torso to heave the weight up, which cheats the rep and stresses the lower back.
Frequently asked questions
What muscles does the dumbbell one arm Y elevation work?
It primarily targets the side (lateral) and rear (posterior) deltoids, with the infraspinatus, teres minor, and the middle and lower trapezius fibers assisting to stabilize and control the shoulder blade.
How heavy should the dumbbell be?
Go light. This is a shoulder-health and control movement, so pick a weight you can raise smoothly through the full Y angle without swinging or shrugging — often lighter than you'd expect.
Is the dumbbell one arm Y elevation good for beginners?
Yes. It's a low-load, single-arm exercise that builds rear-delt and scapular strength and reinforces good posture, making it a safe and useful addition for newer lifters.
How many sets and reps should I do?
Because it's a light accessory move, 2 to 3 sets of 12 to 15 reps per arm works well. Focus on slow, controlled reps rather than heavy weight.
Where should I feel this exercise?
You should feel it in the side and rear of your shoulder and across the middle of your upper back, not in your upper traps or neck. If you feel it shrugging up, lighten the load and keep the shoulder blade pulled down.
