Rotator Cuff: Anatomy, Injuries, and Strengthening Exercises
The shoulder is one of the most complex and mobile joints in the human body. At the heart of this mobility lies the rotator cuff , a group of four essential muscles and their associated tendons. These structures act as a dynamic stabilizer, keeping the head of your upper arm bone firmly within the shallow socket of the shoulder blade. Whether you are lifting a heavy box, reaching for an item on a high shelf, or participating in competitive sports, these muscles are working silently to ensure your shoulder moves smoothly and safely. Understanding the Anatomy and Common Injuries The four muscles that make up this stabilizing unit are the supraspinatus, infraspinatus, teres minor, and subscapularis. Because these tendons must navigate a tight space under the shoulder bone, they are highly susceptible to wear and tear. Overuse, poor posture, or sudden acute trauma can lead to inflammation, known as tendonitis, or more severe structural damage like a tear. Common symptoms of injury in...