Every movement with step-by-step instructions, the muscles it works, common mistakes and form tips — free, no account needed.
The Dumbbell One Arm Low Fly belongs to the push family of movements and targets the shoulders with dumbbell. Because the primary movers raise and rotate the upper arm, the payoff shows up in overhead capability and shoulder joint stability. What separates this variation from other shoulders work is that it is training one arm at a time — a detail that changes which fibres take the load and how much stability the movement demands. Note the 'One Arm Low Fly' component of the name: it specifies how this variation differs from otherwise similar shoulders movements. Support comes from the traps and rotator cuff; the traps in particular help elevate and retract the shoulder blades, which is why fatigue there often shows up before the shoulders is fully worked. Training this with dumbbell allows each side to work independently, exposing and correcting strength imbalances, though it demands more stabilisation, so usable load is lower than a barbell. Most lifters place the Dumbbell One Arm Low Fly in the first half of a shoulders session. It demands established technique, adequate mobility and a base of general strength before it earns a place in your programme.
The Dumbbell One Arm Low Fly is primarily a shoulders exercise, but it is never only the shoulders doing the work.
The general rule for the Dumbbell One Arm Low Fly is simple: inhale as you lower the resistance toward you, exhale as you press it away. For heavier sets, take a breath in at the start position, brace as though bracing for a punch, and hold that pressure through the hardest part of the rep before exhaling. Getting this right stabilises your trunk and keeps blood pressure in a sensible range.
Shorten the range of motion to the portion you can control, then extend it as confidence builds. If dumbbell feels unmanageable, rehearse the same pattern with bodyweight first. Treat the Dumbbell One Arm Low Fly as skill practice at this stage — the shoulders adapts plenty from clean reps.
Increase total working sets before increasing load — volume drives most of the adaptation at this stage. Hold your Dumbbell One Arm Low Fly load for two sessions before increasing it.
Work closer to genuine failure on the final set, keeping one or two reps in reserve on the rest. Use the Dumbbell One Arm Low Fly as your accessory once your main shoulders lift is done for the day.
The Dumbbell One Arm Low Fly suits most healthy trainees, but it is not appropriate for everyone.
This is general educational information, not medical advice. If you are managing an injury or medical condition, check with a qualified professional before adding this exercise to your programme.
It primarily trains the shoulders, with the traps and rotator cuff assisting. The pattern is classified as push, so the chest, shoulders and triceps working as a unit share the workload.
It is rated advanced and assumes established technique, adequate mobility and a base of general strength. Build up with simpler push variations first.
A practical starting point is 5 sets of 3-5, resting 3-5 min between sets, roughly 2-3x per week. Adjust from there based on how you recover.
You need dumbbell. This allows each side to work independently, exposing and correcting strength imbalances, though it demands more stabilisation, so usable load is lower than a barbell.
As a general rule, inhale as you lower the resistance toward you, exhale as you press it away. Avoid holding your breath for the entire set.
Shoulder impingement when the elbows flare excessively. The simplest correction is to keep the shoulder blades set down and back so the shoulder joint stays in a safe position.
Good substitutes that train the same shoulders pattern include Band Incline Y Raise, Band Y Raise, and Cable Bent Over One Arm Lateral Raise. Pick whichever matches the equipment you have available.
Yes. Start each set with your weaker side and match the stronger side to whatever it managed — that is how you close an imbalance rather than reinforce it.
Within shoulders training, the Dumbbell One Arm Low Fly is the dumbbell variation to reach for when you want a push pattern you can repeat consistently.
The shoulders, or deltoids, cap the upper arm and are made up of three distinct heads: the anterior (front) deltoid, the lateral (side) deltoid, and the posterior (rear) deltoid. Each head pulls the arm in a different direction, so building round, capped, three-dimensional shoulders requires training all three rather than relying on pressing alone. Well-developed shoulders create the width that makes the waist look smaller and the upper body look athletic.
Overhead pressing — with a barbell, dumbbells, or in the Arnold press variation — is the primary mass builder, heavily recruiting the front delts along with the triceps and upper chest. However, the front delts also receive a great deal of work from all chest pressing, so most lifters already have well-developed fronts and underdeveloped sides and rears. That imbalance is why lateral raises, which isolate the side delt and directly widen the shoulders, are one of the most valuable exercises in any physique routine. Rear-delt work such as face pulls and reverse flyes corrects posture and completes the rounded look.
The deltoids are made up of fibres that respond well to higher volume and frequency. Pressing can be trained in moderate ranges around 6 to 10 reps, while lateral and rear-delt isolation thrives in higher ranges of 12 to 20 with controlled tempo, since these movements are about tension and consistency rather than heavy load. Training shoulders two or three times per week, with an emphasis on the side and rear heads, produces the most balanced development.
The shoulder is the most mobile and least stable joint in the body, which makes technique and warm-up especially important. Avoid pressing behind the neck, control the weight on raises rather than swinging it up with momentum, and do not chase heavy dumbbells on lateral raises at the expense of form — leading with the elbows and stopping at shoulder height keeps tension on the delt and the strain off the joint. Including rear-delt and rotator-cuff work helps keep the shoulder healthy for years of training.
Strong, balanced shoulders improve your pressing strength, protect against common gym injuries, and dramatically improve the look of the upper body. Prioritise all three heads using the popular shoulder exercises below.