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§ L · Exercises · ChestUpdated 6/2026

Pec deck

The pec deck targets your chest and helps build strength and muscle control. It also supports your bench press and other pressing movements.

Muscle group
Chest
Equipment
Machine
Exercise type
Isolation
Technique
Basic technique

Muscles worked

§ 01 · Muscles
Primary muscle
Chest
Supporting muscles
Shoulders

How to perform

§ 02 · Steps
  1. 01

    Sit on the pec deck machine with your back and head firmly against the pad and the handles at mid-chest height.

  2. 02

    Adjust the seat height and starting position so your elbows are slightly bent and your upper arms are nearly horizontal without raising your shoulders.

  3. 03

    Brace your core lightly and keep your shoulder blades slightly pulled back and down.

  4. 04

    Bring the handles together in front of your chest in a controlled motion and briefly squeeze at the end without leaning forward.

  5. 05

    Slowly return the handles to the starting position until you feel a stretch, keeping your shoulders down and the movement under control.

Beginner's guide

§ 03 · Guide
What it works

The pec deck targets your chest and helps build strength and muscle control. It also supports your bench press and other pressing movements.

What it should feel like

You should feel it in your chest, not your front delts or arms. Keep your shoulder blades set throughout the movement.

Most common mistake

A common mistake is letting your shoulders roll forward or using too much weight. Pick a load you can return under control.

How to get started at the gym

§ 04 · SisuLift

Pec deck is ready to go in the SisuLift exercise library. The app builds you a program, suggests starting weights and shows this same animation during your workout at the gym.

  • ·A ready training program based on your goal
  • ·Starting weight suggestions and automatic progression
  • ·Set logging and rest timer at the gym
Download on the App StoreGet it on Google Play
SisuLift app workout view

Tips

§ 05 · Tips

Keep the movement focused on your chest: don't let your shoulders roll forward, and maintain support from your shoulder blades. Use a load that allows you to return slowly without your elbow angle changing noticeably.

The pec deck is an effective isolation exercise for the chest when you're aiming for consistent muscle engagement and a controlled stretch.

More exercises: Chest

§ 06 · Same muscles

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