30/05/2026
There’s a muscle on the back of your shoulder that can make reaching overhead feel completely different.
Most people never realise it’s this muscle.
It’s called the infraspinatus. One of your rotator cuff muscles.
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Research shows rotator cuff-related shoulder pain is one of the most common causes of shoulder symptoms, with the infraspinatus playing an important role in shoulder stability and rotation (Lewis, 2016).
When this muscle becomes overworked, people often notice:
• A deep ache at the back of the shoulder
• Discomfort reaching or rotating the arm
• Stiffness with overhead movement
How someone can help you:
• Lie face down
• Find a tender spot on the back of the shoulder blade
• Apply tolerable pressure
• Stretch your arm out next to your head with your thumb pointing toward the floor
• As you bring the arm back down, rotate so the thumb points toward the ceiling
• Repeat 5–10 times
You should feel pressure, not sharp pain.
Stop if you feel:
• Sharp pain
• Numbness down the arm
• Worsening symptoms
📌 DISCLAIMER:
This content is for educational purposes only and is not medical advice. It is not intended to diagnose or treat shoulder pain, rotator cuff injuries, or any condition, or to replace consultation with your doctor or qualified healthcare professional. All viewers are advised to consult their doctor regarding specific health concerns. Dr Mo does not accept responsibility for any health consequences arising from the use of information presented here.
References:
• Lewis, J. (2016). Rotator cuff related shoulder pain. British Journal of Sports Medicine
