← Back to Library

Chest Expansion

Modern Repertoire Upper Body & ArmsCore Integration
open chest
Schematic — Chest Expansion

⚠️ Clinical Contraindications

  • Shoulder Impingement: Opening the arms behind the body can pinch the shoulder. Keep the arms at shoulder height or below and use a lighter spring.

Apparatus Setup

Reformer

Spring Tension 1 Red or 1 Blue Spring
Footbar Position Medium
Gear Bar Normal
Stopper Normal
Headrest Medium

Target Muscles

Deltoids (Secondary)Pectorals (Secondary)Rhomboids (Primary)Trapezius (Primary)

Setup Instructions

Stand on the carriage facing the footbar with feet hip-width apart, holding a strap in each hand at shoulder height with arms long in front.

Execution Instructions

Inhale to open the arms wide and back, expanding the chest and squeezing the shoulder blades; exhale to return the arms forward with control. Keep the ribs down.

Teaching Cues

Breath

"Inhale to open the arms wide, exhale as they return forward."

Alignment

"Keep the shoulders down and the ribs soft — no arching the low back."

Form

"Squeeze the shoulder blades toward each other as the arms open."

Modifications & Progressions

Reduced Opening (Regression)

Open the arms to a narrower range with a lighter spring, keeping the elbows soft.

Shoulder Impingement (Injury Modification)

Keep the arms at or below shoulder height and limit the stretch behind the body.