Shoulder stability is maintained by ligaments and muscles. Damage to these structures can cause instability. Traumatic instability, typically caused by a shoulder dislocation from a fall or sports injury, often presents with visible displacement, swelling, bruising, and an inability to move the arm. Surgery may be required in some cases, with physical therapy focusing on safely strengthening and stabilizing the shoulder muscles.
Overhead athletes may experience sport-specific acquired instability due to overuse, leading to symptoms like clicking, pain during throwing, serving, or smashing, and a sudden inability to perform these movements. Treatment focuses on proper shoulder positioning and sport-specific rehabilitation.
Non-traumatic instability, often seen in hypermobile individuals or following dislocation surgery, results from overly lax shoulder structures. Symptoms include global shoulder pain, frequent dislocations or subluxations, and functional impairment. Treatment focuses on strengthening shoulder muscles and training motor control. To improve overall shoulder stability, exercises on unstable surfaces and incorporating throwing movements are beneficial.
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