The rotator cuff is a group of four muscles and their tendons that surround the shoulder joint, holding the head of the upper arm bone firmly within the shallow socket of the shoulder. These muscles are responsible for nearly every movement your arm makes — lifting, rotating, reaching, and throwing.
Rotator cuff injuries range from mild tendinitis and bursitis to partial or complete tendon tears. They can occur suddenly from a single traumatic event or develop gradually from repetitive overhead activity, poor posture, or age-related degeneration.
Without appropriate treatment, rotator cuff injuries can worsen significantly — leading to chronic pain, frozen shoulder (adhesive capsulitis), muscle atrophy, and permanent loss of function. Early physiotherapy intervention is key to a full recovery.
💡 Did you know? Rotator cuff tears are one of the most common causes of shoulder pain and disability in adults. An estimated 2 million Canadians visit healthcare providers for rotator cuff problems each year.