Dumbbell Seated One Arm Shoulder Press
Dumbbell Seated One Arm Shoulder Press Exercise Description
The Dumbbell Seated One-Arm Shoulder Press is a unilateral vertical press that targets the deltoids (especially anterior and medial) and the triceps brachii. Sitting upright with back support reduces lower-body contribution so you can focus on controlled shoulder motion. The rotator cuff and scapular upward rotators (serratus anterior and upper/lower trapezius) stabilize the shoulder as you press overhead, while your trunk muscles resist side-bending and rotation. Using one dumbbell encourages a smooth overhead path and helps you notice side-to-side differences in control. Keep a neutral spine, a steady ribcage, and a vertical forearm to promote efficient mechanics and shoulder comfort throughout the lift.
- Muscle Groups: Delts, Shoulders
- Target Muscles: Deltoid - Anterior, Deltoid - Lateral
- Assisting Muscles: Triceps Brachii - Lateral Head
- Stabilizing Muscles: External Obliques, Infraspinatus, Serratus Anterior, Trapezius - Lower Fibers, Trapezius - Upper Fibers
- Body Area: Upper Body
- Body Parts: Shoulders
- Body Surface: Front, Side
- Body Symmetry: Unilateral
- Equipment: Dumbbell
- Exercise Patterns: Push
- Exercise Type: Strength
- Functional Grouping: Shoulder Abductors, Shoulder Flexors
- Joint Involvement: Multi-joint
- Muscle Location: Front Shoulder, Side Shoulder
- Movement Direction: Vertical
- Muscle Position: Anterior, Lateral
- Gender: Male
How To Do The Dumbbell Seated One Arm Shoulder Press Exercise
‘- Set an upright bench with back support. Sit tall with feet flat, knees about 90°, ribs stacked over pelvis, and a light abdominal brace.
– Hold one dumbbell at shoulder level on the working side. Wrist straight, forearm vertical, elbow slightly in front of the torso (scapular plane).
– Choose a comfortable grip (neutral or palm-forward) that keeps the forearm vertical and the wrist stacked.
– Keep a long neck and relaxed upper traps; let the shoulder blade move naturally into upward rotation as you press.
– Press the dumbbell straight up until the arm is fully straight without forcefully locking the elbow; biceps finish near the ear.
– Avoid rib flare and excessive low-back arch; keep glutes lightly engaged against the bench.
– Lower the dumbbell under control to shoulder height, maintaining a vertical forearm and elbow slightly forward rather than flared wide.
– Keep the non-working hand on your torso or the bench for stability; head neutral, eyes forward.
– Exhale during the press; inhale as you lower.
– Repeat the same movement on the other side with identical setup and range of motion.
Dumbbell Seated One Arm Shoulder Press Tips
‘- Sit tall with feet flat, knees about 90°, and ribs stacked over your pelvis with a light abdominal brace.
– Start with the dumbbell at shoulder level, wrist straight, forearm vertical, and elbow slightly in front of your torso.
– Choose a grip (neutral or palm-forward) that allows you to keep the forearm vertical and the wrist stacked.
– Keep a long neck and relaxed upper traps, letting your shoulder blade rotate naturally as you press.
– Press the dumbbell straight up so your arm finishes fully straight with the biceps near your ear, without forcefully locking the elbow.
– Avoid letting your ribs flare or your low back arch; keep your glutes lightly engaged against the bench.
– Lower the dumbbell under control to shoulder height, keeping the forearm vertical and the elbow slightly forward instead of flared wide.
– Place your non-working hand on your torso or the bench for stability, with your head neutral and eyes forward.
– Exhale as you press up and inhale as you lower the weight.
Dumbbell Seated One Arm Shoulder Press Beginner Introduction
The Dumbbell Seated One-Arm Shoulder Press is a single-arm overhead weight movement performed while sitting against a supportive bench. Because the body is anchored in a chair-like position, the legs play a smaller role and the workload shifts more clearly to the shoulders and triceps. One hand drives the weight upward, while the other can rest on the body or bench, creating a stable setup that highlights how each side moves on its own.
This vertical pressing pattern challenges the muscles around the shoulder joint, including the rotator cuff and the muscles that guide the shoulder blade, as they guide and steady the arm overhead. The core works in the background to limit leaning or twisting as the weight rises and lowers. Using just one dumbbell allows a natural path above the shoulder and helps reveal differences in strength or control between left and right sides, encouraging smooth, controlled lifting mechanics and comfortable motion through the upper body.