Participants will be prospectively recruited at their first physiotherapist clinical session. On this occasion, participants will be asked to fill in a questionnaire regarding injury situation, game or training, sex, age, sport affiliation, level of sport, other aspects of sport such as participation in several teams and junior versus senior games/training. In addition, questions regarding previous injury will also be documented.
This study aims to investigate if a detailed and comprehensive survey can identify, explain and prevent the risk factors for ACL injury.~A a new questionnaire has been developed with questions to young athletes who have suffered an anterior cruciate ligament injury. The questionnaire is more detailed and provide more information about how the anterior cruciate ligament injury occurred compared with the questionnaires currently available in the literature. This careful documentation will provide new knowledge and might be used to identify, explain and prevent risk factors that cause young athletes to suffer an anterior cruciate ligament injury.