Episode: 579: “AC Joint Seperation Rehab” . Demonstrated here are 3️⃣ example exercises that could be incorporated in a late-stage acromioclavicular joint separation injury rehabilitation program. . Acriomioclavicular joint (ACJ) separation injuries are a common shoulder girdle injury in athletes. This is due to the mechanism of injury, which is usually a direct force to the acromion with the arm in an adducted position. Think of this as landing on your shoulder with your arm by your side, which