Rhomboids Explained: Where They Are, What They Do, and Why They Ache

Your rhomboids are the rhomboid major and rhomboid minor. They sit under the trapezius, the large muscle across your upper back. Their main job is to draw the shoulder blade toward the spine and keep it steady while your arm moves.

Long sitting is thought to keep them in a stretched, working position. Sudden reaching or lifting can overload them. Upper-back ache has other sources, so a pattern is a clue, not a diagnosis. For the bigger picture, see how the shoulder works. Its neighbour, the middle trapezius, is often involved too.

• Strength, mobility, body composition and posture are each associated with shoulder pain and disability in adults over 60 [R28].
• A 2025 review found that scapular stabilization exercise, which trains the muscles that hold the shoulder blade steady, improved pain and function in rotator-cuff-related pain [R03].
• Progressive, resisted exercise probably makes a modest difference. Gentle movement without load probably does not move pain much on its own [R01].

1. Break up long sitting. Every 30 to 60 minutes, stand up, or sit tall and let your shoulders drift down.
2. Try a seated shoulder-blade squeeze. Sit tall and gently draw your shoulder blades together. Hold for three seconds, then release. Stop if it sharpens the ache.
3. Keep frequent items close. Reaching far adds strain.
4. Add gentle, progressive resistance. Start with movements you can do without pain, seated or standing, and build slowly over weeks.