Shoulder Dislocation or Subluxation

This observational study aims to evaluate the long-term recovery and clinical outcomes of patients undergoing minimally invasive (arthroscopic) surgeries for sports-related shoulder and knee injuries. Sports injuries, such as ligament tears, meniscus damage, and rotator cuff tears, are common and can significantly impact a person's daily life and ability to return to sports. While surgery is an effective treatment, the recovery process and final outcomes can vary greatly from person to person. Researchers will follow patients who are already scheduled for routine shoulder or knee surgery at the study center. By collecting detailed information about the patient's initial injury, the specific surgical techniques used by the doctor, and the patient's recovery progress over two years, the study hopes to identify which factors lead to the best healing and functional outcomes. Participants will be asked to complete standard questionnaires about their joint function and pain levels before their surgery, and again at 6 months, 1 year, and 2 years after surgery. The study is strictly observational; it will not change the standard medical care, surgical plan, or rehabilitation routine the patients receive.

The goal of this exploratory prospective study is to determine if an upper extremity test battery, comprised of physical performance tests, analytical tests and patient-reported outcome measures, can predict successful return to sports and quality of life in athletes (age 16-55) after shoulder dislocation. The main research questions are: * Can an Upper Extremity Physical Performance Test Battery predict successful return to sports (= return to pre-injury sports level) in athletes after shoulder stabilization procedure * Can an Upper Extremity Physical Performance Test Battery predict the quality of life in athletes after shoulder stabilization procedure Participants will: * Fill out questionnaires pre-operatively * Fill out the SIRSI questionnaire throughout the rehabilitation * Undergo a testing battery in the return to sport phase, including physical performance tests, analytical tests and patient-reported outcome measures * Fill out questionnaires every 3 months after return to sports, up to 1 year.

The goal of this clinical trial is to test the effect of a novel assessment and treatment strategy for young adults with severely disabling non-traumatic shoulder instability. The main question it aims to answer is if this treatment will substantially change the patients shoulder function to a more stable and controllable state and thereby give a higher quality of life. Participants failure in active shoulder muscle function will be assessed and exercises will be selected individually. Patients will be asked to perform the exercises twice per day. At clinical visits to a specialized physiotherapist the exercises will be upgraded to restore full dynamic stability throughout shoulder movement range. The active treatment period will be 4 months. Researchers will compare two groups. One group will start directly after a baseline assessment is fulfilled. The other group will receive the treatment with a delay of 4 months to evaluate if the selected exercises can substantially change the shoulder stability compared to no treatment, the natural course of the condition.

This study will compare functional outcomes after an arthroscopic Bankart repair between patients that underwent conventional arthroscopic Bankart repair rehabilitation, following the American Society of Shoulder and Elbow Therapists guideline and patients that underwent 'multifactorial approach training', which focusses on decreasing kinesiophobia and fear of recurrent dislocations. The study population comprises patients who will undergo Arthroscopic Bankart Repair (ABR) after a traumatic anterior shoulder dislocation at Spaarne Gasthuis Haarlem/Hoofddorp, OLVG Amsterdam, Amstelland Ziekenhuis Amstelveen, Gelre Ziekenhuizen, Medisch Spectrum Twente, or Flevoziekenhuis Almere.