The reverse pec deck uses the same machine as the pec deck chest fly, but facing the opposite direction, to isolate the rear deltoids and upper back through a guided, stable arc — a genuinely accessible posture-focused exercise for beginners.
Resistance exercises can be valuable for strength and function, but technique, load, training history and individual health conditions matter. This exercise is often included in posture-focused programmes, but it does not treat any medical condition on its own.
Adjust the seat height so the handles align with shoulder height when facing the pad. Most pec deck machines allow you to simply turn around and face the pad to switch from the chest fly to this rear-delt version.
Keep your chest against the pad and your torso upright throughout — avoid arching your back or using momentum to swing the handles.
Exhale as you pull your arms back, inhale as you return to the starting position.
Sets
2-3 sets
Reps
12-15 repetitions
Duration
Under 15 minutes
Rest
30-60 seconds between sets
Estimated completion time: Under 15 minutes for the full set of 2-3 sets, including rest between sets.
These are general, real starting points — not an automatic prescription for every user.
Use a lighter resistance, or the seated dumbbell rear delt raise or banded face pull instead.
Increase the resistance gradually, or add a brief pause at the back of the movement.
If This Machine Isn't Available
If unavailable, the seated dumbbell rear delt raise, dumbbell reverse fly, or banded face pull all train a similar rear-shoulder pattern.
Primary Muscles
Rear deltoids, Rhomboids
Secondary Muscles
Trapezius
Movement Pattern
isolation
Use a resistance appropriate for a small-muscle isolation exercise. Stop if concerning symptoms occur, including shoulder pain.
Joint Considerations
A light-load, small-range shoulder exercise; stop if you feel pinching at the shoulder rather than pushing through it.
Suitability depends on the individual — this list isn't an absolute contraindication for everyone in these categories.
Goals
Same movement pattern, different equipment — useful if you don't have what this exercise calls for.
How often can I do this exercise?
A common starting point is 2-3 sessions per week with at least a day of rest for the same muscle group in between, but this depends on your overall programme, recovery, and goals — start conservatively and progress gradually.
What if I don't have gym machines or cables?
If unavailable, the seated dumbbell rear delt raise, dumbbell reverse fly, or banded face pull all train a similar rear-shoulder pattern.
Is this exercise safe if I have a current injury or health condition?
This exercise carries specific cautions for some people (see "Who Should Be Cautious?" above) — suitability depends on your individual situation, so check with your doctor or physiotherapist if any of those apply to you.
Is this exercise appropriate for a true beginner?
Yes — this is classified as a beginner-level exercise, though the regression above offers an even gentler starting point if needed.
References