Real-life, observational, monocentric, prospective, longitudinal study, carried out at the European Center for Sports Rehabilitation (CERS), France.

The data will be collected through an electronic Case Report Form completed by the physician, and some auto-questionnaire completed by the patient.

Inclusion Criteria:

• Age ≥ 15 years;

• Patient treated at the European Sports Rehabilitation Center after a first arthroscopic surgery on the external lateral ligament of the ankle for chronic instability by anatomical reconstruction:

  • With tendon graft;
  • By suture with biological reinforcement;

• Non-opposition of the patient and his/her parents (if minor) to the collection of his/her personal data.

Exclusion Criteria:

- Minor patient (age <18 years) not accompanied by one of his/her parents or legal representative during the inclusion visit;

• History of surgery on the same ankle;
• Associated complex osteochondral or internal ligament damage, syndesmosis, fracture;
• Non-anatomical reconstruction;
• Inability of the patient to understand the study protocol;
• Vulnerable person whose inclusion is not justified by the purposes of the research: pregnant woman, person undergoing psychiatric care, or adult person subject to legal protection.

Patients treated in rehabilitation at the European Sports Rehabilitation Center after anatomical surgery for chronic lateral ankle instability.