Patients who accept to participate will complete web-based questionnaires distributed via smart phones or e-mail, once a week the first 6 weeks, every second week up to 3rd month, every month up to 1 year and every second month up to 3 years after initial injury. The length of the questionnaires varies from very short (approximately 10 questions that take 2 minutes to fill in) to longer at specific critical time points. Each time the patient has contact with an orthopedic surgeon, the patient, orthopedic doctor and physiotherapist (if the patient has contact with one) will be asked to answer a questionnaire about choice of treatment (surgery or not). In addition, when the patient reports that they are back to sport activity, the patient and the physiotherapist will be asked to answer a questionnaire about the decision to return to sport. Patients who will have ACL reconstruction will be followed up with new baseline from the time of reconstruction.