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What is the Rotator Cuff?

Online Glossary / Quick Reference

Term for the group of muscles and tendons around the shoulder joint; include the supraspinatus, infraspinatus, teres minor, and subscapularis.

About Rotator Cuff

The rotator cuff is a term for the group of muscles and tendons that surround the shoulder joint. These muscles and tendons play a crucial role in stabilizing the shoulder and allowing a wide range of movements. The rotator cuff consists of four muscles: supraspinatus, infraspinatus, teres minor, and subscapularis.

Components of the rotator cuff

  • Supraspinatus: Located at the top of the shoulder, this muscle helps lift the arm away from the body.
  • Infraspinatus: Positioned at the back of the shoulder, it assists in rotating the arm outward.
  • Teres Minor: Also at the back of the shoulder, this muscle aids in the outward rotation of the arm.
  • Subscapularis: Found at the front of the shoulder, it helps rotate the arm inward.

Functions of the rotator cuff

  • Shoulder stability: The rotator cuff muscles and tendons keep the shoulder joint stable, preventing dislocations and providing support during movements.
  • range of motion: These muscles allow for a wide range of shoulder movements, including lifting, rotating, and swinging the arm.
  • Injury Prevention: A strong rotator cuff helps protect the shoulder from injuries, especially during activities that involve repetitive shoulder movements.

Common rotator cuff Injuries

  • Tendonitis: Inflammation of the rotator cuff tendons, often caused by repetitive stress or overuse.
  • rotator cuff Tear: A tear in one or more of the rotator cuff tendons, leading to pain, weakness, and limited shoulder mobility.
  • Impingement Syndrome: Occurs when the rotator cuff tendons are pinched during shoulder movements, causing pain and inflammation.

Exercises to Strengthen the rotator cuff

  • External Rotations: Using a resistance band or dumbbell, rotate the arm outward to strengthen the infraspinatus and teres minor muscles.
  • Internal Rotations: Rotate the arm inward against resistance to target the subscapularis muscle.
  • Scapular Retractions: Squeeze the shoulder blades together to improve the overall stability and function of the shoulder girdle.
  • Shoulder Abductions: Lift the arm sideways against resistance to strengthen the supraspinatus muscle.
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