Reverse Pec Deck
The reverse pec deck is a shoulders (deltoids) rear-delt movement done with a machine. It also works the upper back (lats and rhomboids). On weyt.ai it counts toward Balance as Shoulders (minimum 6 sets per 30 days) and toward Gains at the weight you log.
At a glance
| Muscle group | Shoulders |
|---|---|
| Primary muscles | shoulders (deltoids) |
| Secondary muscles | upper back (lats and rhomboids) |
| Equipment | Machine |
| Logged as | Reps per set |
| Gains scoring | Load-scored |
| Balance group | Shoulders · minimum 6 sets per 30 days |
| Strength standards | none (standards exist for barbell and dumbbell lifts with published norms) |
How weyt.ai scores it
- Balance: every logged set counts toward the Shoulders group, which needs at least 6 sets per 30 days for full credit.
- Gains: load-scored. Your best working set each session feeds an estimated one-rep max and a volume trend per lift over 8 weeks.
- Routine: any session that includes it counts toward your weekly target, the 4-week consistency window and your streak.
Scoring is deterministic code, not AI: the same sets always give the same Weyt Score. Read the method on the about page.
Also called
machine reverse fly, rear delt machine, reverse pec deck fly, machine rear delt fly
Log it under any of these names and weyt.ai resolves it to the same exercise, so your history and progression never split across spellings.
Related shoulders exercises
- Dumbbell Rear Delt Fly
- Cable Rear Delt Fly
- Machine Shoulder Press
- Machine Lateral Raise
- Landmine Press
- Barbell Overhead Press
Everything else that counts as shoulders
Dumbbell Shoulder Press · Arnold Press · Push Press · Kettlebell Press · Band Overhead Press · Dumbbell Lateral Raise · Cable Lateral Raise · Band Lateral Raise · Dumbbell Front Raise · Plate Front Raise · Pike Push-Up · Handstand Push-Up · Battle Ropes