WhatWorksWhat.
Chest

Machine Chest Press

Pure chest, with the stability cost removed.

Complexity · Lowhypertrophybeginner+Selectorized machine
  • Chest
  • Chest - Middle (sternal)
  • Front delts
  • Triceps
  • Upper (clavicular)
  • Middle (sternal)
  • Lower (costal)

PrimarySecondary

What it hits

Parts of the target muscle.

  • Upper (clavicular)

    Not hit

    Targeted on incline pressing/flys.

  • Middle (sternal)

    Hit

    Targeted on flat pressing.

  • Lower (costal)

    Not hit

    Targeted on decline pressing and dips.

The movement

Get it right, not roughly right.

Optimal form

3:03· Colossus Fitness

How to PERFECT The Pec Deck | (CHEST FLY MISTAKES & TIPS)

Bottom (stretch)

Lockout

Adjust the seat so the handles align with mid-chest. Press out without locking the elbows hard. Lower until you feel a chest stretch - usually slightly past the line of the chest.

Common mistakes

  • Seat too high - turns into a downward press, shoulders take over.
  • Bouncing reps in the bottom.

Where you should feel it

Pure chest, with the stability cost removed.

Injury risk · 1/10

Variations

Same movement, moved emphasis.

Ranked by how directly each variation still trains chest. 80%+ means the target barely changes. Below 60%, the emphasis has meaningfully shifted — useful for variety, but less precise for the specific part. The label calls it at a glance.

  • Hammer Strength chest press

    Plate-loaded converging press.

    100% on target

    On target

    Same target, minor adjustment.

  • Iso-lateral chest press

    One arm at a time.

    100% on target

    On target

    Same target, minor adjustment.

Compare with another exercise

Cool-down

Worked it. Walk it back down.

A couple of minutes here pays back in soreness avoided tomorrow. Browse the full library.

  • Doorway Pec Stretch

    Forearm against doorway, elbow at shoulder height. Step the same-side foot through. 45s per side.

    ChestFront delts

  • Cobra Pose

    Lying face-down, hands under the shoulders. Press the chest up by extending the back. Hips stay on the floor. 30s. Antidote to a long day of crunches and sitting.

    AbsFront deltsChest

  • Downward Dog

    Hands and feet on the floor, hips in the air making an inverted V. Press the heels toward the floor. Pedal the heels alternately for a stronger calf stretch. 45s.

    CalvesHamstringsLatsFront delts

Coach note

Underrated. The lack of stability lets the chest take the full load - great late in a session when you can't risk free weights.