Dumbbell Rear Fly
Dumbbell Rear Fly strengthens the rear deltoids and upper back stabilizing muscles, which helps in scapular control and improves posture. The movement reduces the strain of forward-turned shoulders and balances pulling and pushing muscles. Suitable for both warm-up and as a light strength exercise.
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Required equipment
Why Dumbbell Rear Fly?
The reverse fly with dumbbells, known in English as Dumbbell Rear Fly, is an excellent exercise for strengthening the smaller stabilizing muscles of the rear deltoids and upper back. This movement is particularly important in today's society, where many of us spend a lot of time in a forward-leaning position, such as sitting at a computer. As a result, the front deltoids and pectoral muscles become tight, while the rear deltoids and upper back weaken, which can lead to poor posture and even pain. The reverse fly helps to correct this imbalance by strengthening the very muscles that pull the shoulders back and down. Regular practice improves scapular control, stability, and overall posture. It reduces the strain caused by forward-turned shoulders and balances the body's pulling and pushing muscles, which is crucial both in daily life and in other training. This exercise is excellent for fitness enthusiasts of all levels, especially beginners, as it is relatively easy to learn and is usually performed with light weights, minimizing the risk of injury. You can include it as part of your warm-up or do it as part of upper body strength training. It helps build a stronger foundation for more effective and safer workouts and achieves better body control in the long run.
Benefits
Effectively strengthens the rear deltoids.
Improves body posture and alignment.
Reduces forward shoulder rotation.
Balances upper body musculature.
Promotes better scapular control.
Prevents shoulder and neck pain.
Supports other upper body strength movements.
Muscle groups
Primary
- deltoids9
- deltoids9
Secondary
- trapezius6
- trapezius6
- upper-back6
- upper-back6
Stabilizers
- abs3
- lower-back3
- gluteal2
- gluteal2
- hamstring2
- hamstring2
- forearm3
- forearm3
How to perform
Setup
- Choose light to moderate dumbbells that allow for controlled sets of 10-15 repetitions.
- Position yourself by hinging at the hips at about a 45-70 degree forward lean, with a slight bend in the knees and a neutral back.
- Let your arms hang straight under your shoulders, with a slight softness in the elbows. Thumbs slightly up/front (light external rotation). Engage your core.
Execution
- Gently pull your shoulder blades back and down and lift the dumbbells to shoulder height from the sides without swinging.
- Pause at the top position and squeeze between the shoulder blades for 1-2 seconds.
- Lower the weights in a controlled manner over 2-3 seconds while maintaining the back position and tension in the core. Repeat for the desired repetitions.
Coaching cues
- •Do not shrug your shoulders to your ears – pull your shoulder blades down and out.
- •The movement originates from the shoulder blades and rear deltoids, not the lower back or by swinging with your legs/back.
- •Keep your neck long and gaze at the floor – do not overextend your head.
- •Maintain a slight external rotation (thumbs slightly up) to keep the shoulder joint open.
- •Exhale while lifting, inhale while lowering; tempo 1–0–2 or 1–1–3.
Common mistakes
❌ Weights that are too heavy
Why it's wrong: When the weight is too heavy, the movement turns into a swing, and more of the trapezius or lower back muscles are engaged instead of the rear deltoids. This takes the focus away from the target muscles and increases the risk of injury.
✓ Fix: Choose light dumbbells that allow you to perform a controlled movement focusing on the contraction of the rear deltoids. Quality over quantity.
❌ Performing the movement too quickly
Why it's wrong: A fast, jerky movement relies more on momentum than muscle strength. This reduces the activation of the rear deltoids and hinders effective muscle growth.
✓ Fix: Perform the movement slowly and in a controlled manner. Focus on squeezing the rear deltoids at the top position and lowering the weights in a controlled manner.
❌ Rounding or arching the back
Why it's wrong: Losing the position of the back unnecessarily strains the lower back and can lead to pain. It also weakens the isolation of the rear deltoids.
✓ Fix: Keep your back straight and in a neutral position throughout the movement. You can lightly engage your core muscles to support your torso.
Frequently asked questions
How often should the reverse fly be performed?
The reverse fly can be included in your workout program 2-4 times a week depending on the overall amount of training and goals. If you do it as a warm-up, you can do it more often. For strength training, 2-3 times a week is a good starting point. The most important thing is to give the muscles enough time to recover.
Can the reverse fly be done at home without a bench?
Yes, absolutely! The reverse fly can be performed at home by leaning forward while standing or by supporting yourself on the back of a chair. The key is to get the upper body into a sufficiently horizontal position to effectively activate the rear deltoid muscles. Using a stability ball or the edge of a sofa is also possible.
Why should I strengthen my rear deltoids?
Strengthening the rear deltoids is vital for posture and upper body balance. They help pull the shoulders back and prevent forward-turned shoulders, which are common today. Strong rear deltoids also support shoulder health and performance in other upper body movements, reducing the risk of injury.
Is the movement safe for beginners?
Yes, the reverse fly is a very safe movement for beginners as long as light weights are used and proper technique is focused on. It is a great way to learn to engage the rear deltoid muscles and improve body control without a high risk of injury. Always start with small weights and increase the load only when the technique is solid.
Safety tips
- Always start with light weights to ensure proper technique.
- Keep your back straight and engage your core throughout the movement.
- Avoid jerky movements; perform the movement in a controlled manner.
- Do not try to lift the weights too high to avoid overloading the shoulders.
- Listen to your body and stop if you feel pain.
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