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  5. Chest
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  7. Seated Alternate Dynamic Chest Stretch On A Chair

Exercise guide

Seated Alternate Dynamic Chest Stretch On A Chair

  • Beginner
  • Isolation
  • Timed hold
  • Chest
  • Shoulders

This dynamic stretch improves chest and shoulder mobility by actively lengthening the pectorals and anterior deltoids. It is an effective movement to counteract 'hunched' posture and increase blood flow to the upper body while seated.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Seated Alternate Dynamic Chest Stretch On A Chair demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Pectorals

Secondary

  • Serratus anterior

Equipment

  • Body weight

Setup

  1. Sit tall on the edge of a sturdy chair with your feet flat on the floor, hip-width apart.
  2. Engage your core and maintain a neutral spine with your shoulders rolled back and down.
  3. Rest your hands on your thighs to begin.

How to do it

  1. Inhale and extend one arm out to the side at shoulder height, reaching back until you feel a gentle stretch in your chest.
  2. Exhale as you slowly bring the arm back to the starting position in a controlled motion.
  3. Repeat the movement on the opposite side, alternating arms in a fluid, rhythmic pattern.
  4. Maintain a steady tempo, spending approximately 2 seconds on the reach and 2 seconds on the return.

Form checklist

  • Keep your chest lifted and avoid rounding your shoulders forward.
  • Ensure your shoulders stay down and away from your ears to avoid shrugging.
  • Keep your hips and knees facing forward; the movement should originate from the shoulder and upper back.
  • Move through a comfortable range of motion without bouncing or forcing the stretch.

Pro tips

  • Focus on the 'opening' sensation in the pectoral muscle rather than just swinging the arm.
  • Imagine reaching your fingertips toward the back corner of the room to maximize the dynamic lengthening of the chest fibers.

Make it harder

  • Add a slight thoracic (upper back) rotation toward the reaching arm to deepen the stretch.
  • Perform the reach with your thumb pointing upward and slightly backward to emphasize the stretch on the anterior deltoid.

Frequently asked

What muscles does the seated alternate dynamic chest stretch on a chair work?
The seated alternate dynamic chest stretch on a chair primarily targets the pectorals, and also works the serratus anterior as secondary muscles.
What equipment do you need for the seated alternate dynamic chest stretch on a chair?
The seated alternate dynamic chest stretch on a chair requires no equipment — just your body weight.
Is the seated alternate dynamic chest stretch on a chair good for beginners?
Yes. The seated alternate dynamic chest stretch on a chair is a beginner-friendly movement and a strong foundation to build on.

Related exercises

  • Air Punches MarchBeginner · calves, pectorals, and quadriceps
  • Alternate Front Kick In Place With Arm CirclesBeginner · abs, calves, deltoids, and pectorals
  • Archer Push-UpAdvanced · pectorals
  • Arm CrossoverIntermediate · deltoids and pectorals

Train it with Crucible Fit.

Every movement in this library is in the app with video and instructions, ready for your own sessions on the days between Crucibles. Your first Crucible is on us.

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