Fysiqal

Isolation · Beginner

Pec Deck

Isolation isolation exercise using machine.
Pec Deck demonstration (no audio).
Movement pattern
Isolation
Difficulty
Beginner
Equipment
Machine
Mechanics
Isolation
Sides
Bilateral
Main plane
Transverse

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How to do the Pec Deck

Cues reviewed by Kwabena Osei on

Setup

Seated with your back against the pad, forearms/elbows against the machine's arm pads, a slight bend in your elbows.

  1. Squeeze the pads together in front of your chest, keeping that slight elbow bend fixed throughout -- a slightly bent elbow gives a stronger chest contraction than a straight arm.

  2. Return under control to a full stretch at the sides.

Common mistakes

  • Locking the elbows straight, which weakens the contraction instead of strengthening it.

  • Using momentum to slam the pads together instead of a controlled squeeze.

Muscles worked

Primary

Secondary

How the knowledge graph models this movement

Each joint action, with the role and emphasis the graph assigns each muscle. These are qualitative anatomical labels, not measured muscle activation.

  • Shoulder horizontal adductionprimary action

    Pectoralis major (prime mover, high emphasis); Pectoralis major (prime mover, moderate emphasis); Anterior deltoid (synergist, moderate emphasis); Pectoralis minor (stabilizer, low emphasis); Serratus anterior (stabilizer, low emphasis); Biceps brachii (synergist, low emphasis)

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Educational content only — not medical advice. Consult a qualified professional for individual guidance, especially around injury, pregnancy or medical conditions.