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How is the rotator cuff injured?
The rotator cuff can be injured because of degeneration with aging or
inflammation due to tendinitis, bursitis, or arthritis of the
shoulder. The rotator cuff is commonly injured by trauma (such as
from falling and injuring the shoulder or overuse in sports).
Rotator cuff injury is particularly common in people who perform
repetitive overhead motions that can stress the rotator cuff. These
motions are frequently associated with muscle fatigue.