Lever Seated Reverse Fly
- Target muscle
- Deltoid Posterior
- Synergist muscles
- Deltoid Lateral, Infraspinatus, Teres Minor, Trapezius Lower Fibers, Trapezius Middle Fibers
- Equipment
- Leverage machine
- Body part
- Shoulders
- Type
- Strength
The lever seated reverse fly is a machine isolation exercise that targets the posterior deltoid, with help from the lateral deltoid, infraspinatus, teres minor, and the middle and lower trapezius. The chest pad takes your torso and lower back out of the equation, so it is one of the cleanest ways to train the rear shoulder and balance out heavy pressing volume.
How to do the Lever Seated Reverse Fly
- 1Set the seat height so the handles sit level with your shoulders when you sit upright against the chest pad.
- 2Sit facing the machine and press your chest into the pad, spine neutral and feet flat on the floor.
- 3Grasp the handles with a neutral or pronated grip, arms out in front of you with a slight bend at the elbows.
- 4Brace your core and set your shoulder blades down and slightly back before the first rep.
- 5Drive both arms out to the sides in a wide arc, leading with your elbows and holding the elbow bend fixed — do not straighten or curl the arms.
- 6Continue until your arms are roughly in line with your torso, squeezing the rear delts and mid-back for a beat at the end of the range.
- 7Return the handles under control to the starting position without letting the load rest between reps.
- 8Complete your reps, then release the handles and step away from the machine.
Form tips
- If the handles sit above shoulder height, drop the seat a notch — a high handle path lets the upper traps take over the pull from the rear delts.
- Take at least as long returning the handles as you do driving them back; the lowering phase is where much of the stimulus comes from.
- Keep your shoulders down and away from your ears for the whole set instead of shrugging them up as the reps get hard.
- A neutral (palms-facing) grip tends to widen the arc and favor the rear delt, while a pronated grip pulls in more middle trapezius — pick one and stay consistent within a set.
- Pick a load you can move through the full range for every rep; the rear delt is a small muscle and responds better to control than to weight.
Common mistakes
- Letting the load settle at the start position between reps, which dumps tension off the rear delts and makes the set easier than the rep count suggests.
- Swinging the arms back with momentum, which shortens the working range and hands the rep to the traps and lower back instead of the posterior deltoid.
- Peeling your chest off the pad to finish a rep — this turns the fly into a partial row and moves load off the rear delts.
- Forcing the handles far behind the torso, which grinds the front of the shoulder and stresses the rotator cuff rather than the deltoid.
- Death-gripping the handles, which floods the forearms with tension and makes the rear delts harder to feel; hold just tightly enough to keep control.
Frequently asked questions
What muscles does the lever seated reverse fly work?
The primary target is the posterior deltoid. The lateral deltoid, infraspinatus, teres minor, and the middle and lower trapezius fibers assist throughout the movement.
How is the lever seated reverse fly different from a dumbbell reverse fly?
The leverage machine fixes the arc and gives you a chest pad to brace against, so you can isolate the rear delt without fatiguing your lower back. Dumbbells allow a freer path but demand more stabilization and core bracing.
Should my elbows be straight or bent during the reverse fly?
Keep a slight, fixed bend of roughly 10–20°. Locked-out arms put unnecessary stress on the elbow, while a deep bend shortens the lever and shifts the work toward the middle trapezius.
How many sets and reps should I do?
Three to four sets of 12–20 reps suits the rear delt, which responds well to moderate-to-high rep ranges. Choose a weight that gets hard in the last few reps while still allowing full range of motion.
Where should the lever seated reverse fly fit in my workout?
Run it after your heavy compound work such as rows or overhead presses. As an isolation exercise it belongs near the end of a shoulder or back session, once the big lifts are done.
