Exercise guide
Shoulder - Transverse Extension
- Beginner
- Compound
- Timed hold
- Back
- Shoulders
This exercise isolates the posterior deltoids and mid-back muscles, improving shoulder health and posture by moving the arms horizontally against gravity. It is an effective bodyweight movement for strengthening the rotator cuff and scapular stabilizers.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Lie face down on a flat surface or mat with your legs fully extended.
- Extend your arms straight out to the sides at shoulder height, forming a 'T' shape with your body.
- Position your hands so your thumbs are pointing toward the ceiling.
- Keep your forehead resting on the floor or slightly elevated to maintain a neutral spine.
How to do it
- Exhale as you squeeze your shoulder blades together and lift your straight arms toward the ceiling.
- Focus on leading the movement with the back of your shoulders, keeping your arms parallel to the floor.
- Pause for one second at the top of the movement to emphasize the peak contraction.
- Inhale as you slowly lower your arms back to the starting position with a controlled 2-second tempo.
Form checklist
- Keep your thumbs pointed up to maximize external rotation and rear delt engagement.
- Avoid shrugging your shoulders toward your ears; keep your shoulder blades tucked down.
- Keep your forehead down or gaze at the floor to prevent neck strain.
- Ensure the movement comes from the shoulders and upper back, not by arching your lower spine.
Pro tips
- Visualize trying to pinch a pencil between your shoulder blades at the top of the lift.
- Focus on 'reaching' your hands outward toward the walls to create more tension in the posterior deltoids.
Make it harder
- Add a 3-5 second isometric hold at the top of each repetition.
- Pulse your arms in a small range of motion at the top of the movement for 10 seconds before lowering.
Frequently asked
- What muscles does the shoulder - transverse extension work?
- The shoulder - transverse extension primarily targets the deltoids, lats, rhomboids, and rotator cuff, and also works the abs and serratus anterior as secondary muscles.
- What equipment do you need for the shoulder - transverse extension?
- The shoulder - transverse extension requires no equipment — just your body weight.
- Is the shoulder - transverse extension good for beginners?
- Yes. The shoulder - transverse extension is a beginner-friendly movement and a strong foundation to build on.