Description of Return to Sport in Amateur Athletes Who Underwent Several Functional Tests (K-STARTS, Vertical Jumps and Soleus Muscle Strength) After Initial ACL Reconstruction

ACL injuries are incapacitating for both professional and amateur athletes, with long-term repercussions on performance and return to sport (RTS). Surgical reconstruction of the ACL is the main treatment option. Despite this, recurrence rates are high. Half of all recurrences occur within 8 months of reconstruction, and 70% within the first 6 months after RTS. Decision to RTS is therefore an important one, as returning too early can increase the risk of recurrence, while returning too late delays a return to pre-injury performance levels. As described by the Bern Consensus, RTS consists of three phases : * Phase 1: Return to participation (RTp) * Phase 2: Return to sport (RTS) * Phase 3: Return to performance (RTP) RTS decision must be based on multiple factors, including psychological, athletic and functional components, as well as specific nature of the patient's activities. However, few individual tests have been associated with a specific level of RTS. Furthermore, the majority of studies rely on subjective and non-objective assessments to determine whether the athlete has returned to their pre-injury level. It would therefore be relevant to study the RTS time of patients who have performed a combination of several objective functional tests whose results could be complementary, in particular the K-STARTS, the CMJ, the DJ and the measurement of soleus muscle strength.

Inclusion Criteria: * Patient, male or female, aged between ≥ 18 and ≤ 30 years old * Amateur athlete with a Tegner score ≥ 5 * Patient with primary ACL reconstruction dating back 6 months * Patients with ACL damage in one knee only * Patients who have undergone an isokinetic strength test with results that do not contraindicate functional testing * Patients affiliated with or covered by a social security scheme * French-speaking patients who have signed an informed consent form Exclusion Criteria: * Patients treated for bilateral ACL reconstruction * Patients who are professional athletes or compete at a national level * Patients with severe associated disorders (neurological, connective tissue, congenital diseases) * Patients with multiple ligament defects or associated osteotomy * Patients already included in another study * Protected patients: adults under guardianship, curatorship or other legal protection, deprived of their liberty by judicial or administrative decision