Reverse Pec Deck
Muscles worked
Instructions
- 1Adjust the handles so that they are fully to the rear. Make an appropriate weight selection and adjust the seat height so the handles are at shoulder level. Grasp the handles with your hands facing inwards. This will be your starting position.
- 2In a semicircular motion, pull your hands out to your side and back, contracting your rear delts.
- 3Keep your arms slightly bent throughout the movement, with all of the motion occurring at the shoulder joint.
- 4Pause at the rear of the movement, and slowly return the weight to the starting position.
table_chartRecommended sets and reps
These ranges vary depending on your training goal — adjust the load accordingly.
| Goal | Sets | Reps | Rest |
|---|---|---|---|
| Strength | 3–4 | 6–8 | 2–3 min |
| Hypertrophy | 3–4 | 10–15 | 60 s |
| Endurance | 2–3 | 15–20 | 30–45 s |
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About Reverse Pec Deck
The reverse pec deck machine isolates the rear head of the deltoid on a guided path. Seated facing the pad, chest braced, you spread the arms backward while squeezing the shoulder blades, then return under control. The machine removes the need to brace the back and manage balance, letting you focus entirely on the rear-shoulder contraction, a muscle that is often hard to recruit. It is an excellent choice for rebalancing a posture dominated by pressing. Take the handles at shoulder height, keep the elbows slightly bent and avoid shrugging.
check_circleBenefits
- check_circleIsolates the rear delt without loading the lower back
- check_circleGuided path, ideal for mastering the contraction
- check_circleEasy to load, perfect for high-rep and drop sets
- check_circleWorks well for high-rep, light-load sets at the end of a session
lightbulbExecution tips
- lightbulbSet the seat so the handles are at shoulder height
- lightbulbKeep the chest pressed against the pad
- lightbulbSweep the arms back, leading with the elbows
- lightbulbPause at the end range then return slowly
- lightbulbChoose a seat setting that lets you keep your chest firmly pressed against the pad
warningCommon mistakes
- warningSqueezing the blades and turning it into a back exercise
- warningUsing loads too heavy that shorten the range
- warningLifting the chest off the pad to cheat
- warningBending and straightening the elbows instead of a fixed angle
- warningSetting the seat too low or too high relative to the handles
tuneVariations and alternatives
- tuneDumbbell rear delt fly — a free-weight version that demands more stabilization and bracing.
- tuneLying incline rear lateral raise — eliminates any momentum cheating without needing the machine.
- tuneCable face pull — adds external rotator work on top of the rear deltoid.
- tuneReverse fly with external rotation — combines the fly and the rotation in one more complete movement.
person_checkWho it's for and level
This machine suits all lifters, especially beginners who find it hard to properly feel the rear deltoid with the free dumbbell rear delt fly, since the guided path greatly eases learning. It's also appreciated by advanced lifters for high-rep and drop sets at the end of a session, with the ease of load adjustment being a clear advantage. People with lower-back discomfort in the bent-over version benefit particularly, since the machine removes the need for lumbar bracing. Suits all levels thanks to its guided, secure path.
shieldSafety and precautions
The main risk comes from an unsuitable seat setting that places the handles too high or too low relative to the shoulders, changing the working angle and potentially creating joint discomfort. Always adjust the seat before starting so the handles sit at shoulder height, and keep the chest firmly pressed against the pad throughout the movement. Avoid lifting the chest to cheat the range with too heavy a load, which cancels out the stability advantage the machine offers. If elbow discomfort appears, check that you're keeping a fixed slight bend rather than straightening and bending them on each rep.
calendar_monthWhere to place it in your program
This machine is best programmed at the end of a shoulder or back session, as an isolation exercise for the rear deltoid, often in high-rep sets. Two to three sets of 12 to 20 reps with a moderate to light load are enough to properly stimulate this area. Two to three times a week suits it well, since this small muscle area recovers quickly between sessions. It pairs very well with the face pull and the dumbbell rear delt fly to vary the rear deltoid's working angles.
helpFrequently asked questions
Reverse pec deck or dumbbell rear fly?
The machine guides the path and removes lower-back cheating, while dumbbells demand more stability. Both target the rear delt.
Should I grip the handles high or low?
Handles at shoulder height give the most horizontal angle, which best isolates the posterior deltoid.
Should I fully straighten the arms?
No: keep the elbows slightly bent and fixed throughout. Fully straight arms change the movement and stress the elbows; the idea is to spread the arms, not lock them.
What load should I choose on this machine?
A moderate load that lets you keep the elbows fixed and properly feel the contraction, rather than chasing heavy weight.
Is this machine available in every gym?
Most well-equipped gyms have one, often combined with the classic pec deck function on the same unit.
Can drop sets be done on this machine?
Yes, it's an excellent choice for drop sets thanks to how easily the load can be adjusted between each step.
Can this be done alternating arms on the machine?
Most machines work with both arms together; an alternating execution requires a specific independent-arm model.
Does the machine version build as much rear delt size as free weights over time?
Yes, given comparable effort and progression, muscle growth is driven by tension and volume, not by whether the path is guided or free.
Can this be done at the end of a back session rather than shoulders?
Yes, it fits very well at the end of a back session as complementary rear deltoid work.
Can this machine be used early in a session as activation work?
Yes, with a very light load it works well as rear deltoid activation before pressing movements.
Is it worth doing a light activation set before the working sets?
Yes, one light set focused purely on feeling the rear delt contract helps prime the mind-muscle connection for the heavier sets after.
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