Validation of an Upper Extremity Physical Performance Test Battery in Patients After Shoulder Dislocation

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.

Inclusion Criteria: * Practising sports with moderate to high demand on the shoulder (based on Degree of Shoulder Involvement in Sport (DOSIS) scale), minimal weekly 3 hours * Shoulder instability event (anterior direction) * Healthy contralateral shoulder * Completion of the postoperative rehabilitation protocol Exclusion Criteria: * Other upper limb pathologies/ associated injuries: e.g. posterior instability, or rotator cuff tear,... * Being pregnant * No intention to return to pre-injury sport