Pec Deck Flys — chest isolation exercise in the LIFTAG library

Pec Deck Flys

Isolation · Weight × reps

Adjust the seat so the handles or forearm pads line up near mid-chest, then sit with your back supported and feet planted. With softly bent elbows, bring your upper arms forward in a controlled hugging arc until they meet or nearly meet. Keep your ribs settled and let your shoulder blades move naturally rather than forcing them flat. Do not let the stack pull your arms abruptly behind your torso; use only the pain-free range your shoulders allow. Changing the seat height slightly can make the machine's fixed path fit your shoulder structure better.

IN THE APP

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Scan the machine's QR tag and this exercise opens ready to log: sets, rest timer, PRs, and your whole progression for Pec Deck Flys.

FOUND ON THESE MACHINES

HOW TO DO PEC DECK FLYS

  1. Set the seat so the handles or pads sit at mid-chest with the shoulders down.
  2. Keep a soft bend in the elbows and the same bend the whole way. This is not a press.
  3. Bring the pads together without shrugging. Return until you feel a chest stretch, not a shoulder dump.

COMMON MISTAKES

  • Turning it into a press. If the elbows travel like a chest press, you picked the wrong machine movement. Stay in a fly arc.
  • Bouncing the stack at the stretch. The stretch is the work. Control it or reduce the pin.

VARIATIONS

PROGRESSIONS

  1. Light stack, two-second squeeze.
  2. Add load when the stretch stays quiet in the shoulder.

PROGRAMMING NOTES

Isolation after a press. 2–4 sets of 10–15. Scan the pec-deck tag so this does not land on machine chest press in the log.

FREQUENTLY ASKED QUESTIONS

Open Pec Deck Flys in LIFTAG, or tap the NFC tag / scan the QR code on the machine at a partner gym. Log each working set as weight × reps. The rest timer starts after you save the set, and PRs plus estimated 1RM update automatically.