What Are the Causes?
Most of the time, rotator cuff injuries are caused by repetitive stress on the rotator cuff, or degeneration caused by aging. Such repetitive stress can include injuries sustained from sports, particularly those that require a lot of shoulder movement such as baseball, tennis, swimming, weightlifting, and football.
As we age, reduced blood supply to the rotator cuff tendons means damage does not repair itself as well, and bone spurs (bony overgrowths) can also weaken the tendon and lead to tears.
Acute injuries caused by falling, using an arm to break a fall, or lifting heavy items with a jerking motion can also lead to rotator cuff tears.