Dumbbell Lying One Arm Supinated Triceps Extension
Dumbbell Lying One Arm Supinated Triceps Extension Exercise Description
The dumbbell lying one‑arm supinated triceps extension isolates the triceps brachii by training pure elbow extension while your shoulder and torso stay stable on the bench. Performed supine with one dumbbell and a supinated grip (palm facing you), it encourages strict control of the upper arm and minimizes compensations from the shoulder. The long head, lateral head, and medial head of the triceps are the prime movers; the anterior deltoid, forearm flexors/extensors, and scapular stabilizers work isometrically to hold position. Keeping a neutral spine, retracted/depressed scapulae, and a steady upper arm helps maintain joint alignment and consistent loading through the elbow’s range of motion. This variation is useful when you want focused triceps work and precise control of the movement path next to the side of your head.
- Muscle Groups: Triceps
- Target Muscles: Triceps Brachii - Long Head
- Assisting Muscles: Triceps Brachii - Lateral Head, Triceps Brachii - Medial Head
- Stabilizing Muscles: Deltoid - Anterior, Extensor Carpi Ulnaris, Flexor Carpi Radialis, Trapezius - Lower Fibers, Trapezius - Middle Fibers
- Body Area: Upper Body
- Body Parts: Arms, Upper Arms
- Body Surface: Back
- Body Symmetry: Unilateral
- Equipment: Dumbbell
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Elbow Extensors
- Joint Involvement: Single-joint
- Muscle Location: Inner Tricep
- Movement Direction: Other
- Muscle Position: Posterior
- Gender: Male
How To Do The Dumbbell Lying One Arm Supinated Triceps Extension Exercise
‘- Lie supine on a flat bench with feet planted and ribs down; maintain a neutral spine and neutral neck.
– Hold one dumbbell directly above the shoulder with a supinated grip (palm facing you), wrist straight, knuckles toward the ceiling.
– Set the shoulder: lightly retract and depress the scapula; keep the upper arm vertical or slightly angled back toward your head.
– Tuck the elbow just inside shoulder width; keep the upper arm still throughout.
– Inhale/brace, then hinge only at the elbow to lower the dumbbell in a controlled arc toward the outside of your forehead/ear.
– Lower until your forearm is roughly parallel to the floor (or until you can maintain shoulder position without discomfort).
– Press back by extending the elbow, finishing with the arm straight without hyperextending; keep the wrist neutral.
– Keep the dumbbell’s path close to your head—no drifting over the face or toward the midline.
– Maintain even tempo and control; avoid flaring the elbow, arching the low back, or letting the shoulder migrate off the bench.
– Return the dumbbell to the start position under control, then switch arms.
Dumbbell Lying One Arm Supinated Triceps Extension Tips
‘- Keep your ribs down, feet planted, and neck neutral to maintain a stable, neutral spine on the bench.
– Start with the dumbbell directly above your shoulder, palm facing you, wrist straight, and knuckles pointing to the ceiling.
– Lightly retract and depress your scapula to set the shoulder before you begin lowering the weight.
– Keep your upper arm vertical or slightly angled back toward your head and hold it still during the entire rep.
– Tuck your elbow just inside shoulder width and avoid letting it flare out as you move.
– Hinge only at the elbow to lower the dumbbell in a controlled arc toward the outside of your forehead or ear.
– Lower until your forearm is roughly parallel to the floor, as long as you can maintain shoulder position without discomfort.
– Extend the elbow to press the dumbbell back up, finishing with a straight arm but without hyperextending the elbow.
– Keep your wrist neutral throughout, avoiding any bending as you lower and press.
– Track the dumbbell close to the side of your head and avoid letting it drift over your face or toward the midline.
Dumbbell Lying One Arm Supinated Triceps Extension Beginner Introduction
The dumbbell lying one‑arm supinated triceps extension is a bench exercise that emphasizes controlled arm work with a single weight. The lifter rests on the back, holding a dumbbell in one hand with an underhand grip, arm starting above the shoulder. From there, the motion centers on bending and straightening at the elbow while the shoulder and body remain steady against the bench, guiding the dumbbell in a close path beside the head.
This movement highlights the triceps as the main driving muscles, with the front of the shoulder, forearms, and supporting muscles around the shoulder and upper back working to stabilize the arm. Because the arm position stays fixed and the torso is braced, the elbow joint experiences a consistent challenge throughout the upward and downward phases. The exercise suits lifters who want a deliberate, precise triceps movement, with an emphasis on steady tempo, body alignment, and limiting extra swinging or shifting from other joints.