Dumbbell One Arm Reverse Fly (With Support)
Dumbbell One Arm Reverse Fly (With Support) Exercise Description
The dumbbell one-arm reverse fly (with support) targets the posterior deltoid while coordinating the scapular retractors, including the middle trapezius and rhomboids, with assistance from the lower trapezius. Using the free hand on a bench for support reduces momentum and trunk demand so you can focus on precise shoulder horizontal abduction. The movement lifts the upper arm out to the side in line with the shoulder while keeping a neutral spine and a quiet torso. Expect the rotator cuff to stabilize the humeral head throughout the arc. Performed correctly, this drill helps develop the back of the shoulder and upper-back musculature with controlled scapulothoracic motion and minimal shrugging.
- Muscle Groups: Delts, Shoulders
- Target Muscles: Deltoid - Posterior
- Assisting Muscles: Rhomboid Major, Rhomboid Minor, Trapezius - Lower Fibers, Trapezius - Middle Fibers
- Stabilizing Muscles: Infraspinatus, Subscapularis, Supraspinatus, Teres Minor
- Body Area: Upper Body
- Body Parts: Shoulders
- Body Surface: Back
- Body Symmetry: Unilateral
- Equipment: Dumbbell
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Shoulder Extensors
- Joint Involvement: Single-joint
- Muscle Location: Rear Shoulder
- Movement Direction: Other
- Muscle Position: Posterior
- Gender: Male
How To Do The Dumbbell One Arm Reverse Fly (With Support) Exercise
‘- Stand side-on to a flat bench. Place your non-working hand on the bench under your shoulder; feet staggered, hips hinged, torso near parallel to the floor, spine neutral.
– Hold a dumbbell in the working hand below the shoulder, palm facing in (neutral grip). Keep a slight, fixed bend in the elbow and a neutral wrist.
– Set the shoulder blade gently down and toward the spine; brace your trunk.
– Sweep the arm out to the side in a smooth arc, leading with the elbow, until the upper arm is roughly in line with your torso.
– Keep ribs down, avoid torso rotation, and do not shrug.
– Pause briefly at the top without hyperextending the low back.
– Lower the weight under control along the same path, maintaining the elbow angle and neck relaxed.
Dumbbell One Arm Reverse Fly (With Support) Tips
‘- Place your non-working hand on the bench directly under your shoulder to stabilize and reduce momentum.
– Stagger your feet and hinge at the hips so your torso stays near parallel to the floor with a neutral spine.
– Let the dumbbell hang below your shoulder with a neutral grip, slight fixed bend in the elbow, and neutral wrist.
– Gently set the shoulder blade down and toward the spine before lifting, and brace your trunk.
– Sweep the arm out in a smooth arc, leading with the elbow, until the upper arm is roughly in line with your torso.
– Keep your ribs down and torso quiet; avoid any rotation as the arm moves.
– Do not shrug; keep the neck relaxed and shoulders away from the ears throughout the movement.
– Pause briefly at the top without hyperextending the low back, then lower the weight under control along the same path.
Dumbbell One Arm Reverse Fly (With Support) Beginner Introduction
The dumbbell one-arm reverse fly (with support) is a bent-over free-weight exercise that emphasizes the back of the shoulder along with the upper-back muscles around the shoulder blades. With one hand resting on a flat bench, the body gains extra balance, which limits swinging and lets the lifting side drive the motion more deliberately. The working arm travels outward away from the torso in a wide arc, roughly in line with shoulder height, while the spine stays long and the trunk relatively still. This trains the rear shoulder and upper back to guide the arm without excess help from the neck.
Throughout the lift, the small stabilizers around the shoulder joint remain active so the upper arm moves smoothly in relation to the torso. The emphasis is on controlled movement rather than heaving the dumbbell, encouraging the shoulder blade to glide toward and away from the spine in a coordinated way. When performed with this kind of precision, the pattern helps build strength and awareness across the back of the shoulders and upper back.