Assessment of Electromyographic Activity in the Quadriceps and Hamstrings of the Operated Limb Versus the Unaffected Limb in Patients Who Have Undergone ACL Surgery, With and Without Post-operative AMI - an Exploratory Study

Traumatic injuries to the knee joint, such as an anterior cruciate ligament tear, can compromise the ability of the muscle at the front of your thigh-known as the quadriceps-to contract voluntarily, despite the anatomical integrity of the nerve and muscle structures responsible for contraction. This phenomenon, commonly known as 'arthrogenic motor inhibition' (AMI), is a major limiting factor for recovery and rehabilitation following an anterior cruciate ligament tear, as well as a potential cause of functional disability if left undiagnosed and untreated. Indeed, motor inhibition that persists during the early months of rehabilitation could lead to under-activation of the quadriceps and over-activation of the hamstrings (the muscles at the back of your thigh). It is of interest to assess, during the rehabilitation phase, the contraction capacity of the various quadriceps and hamstring muscles in the operated limb compared with the unaffected limb in patients who have undergone anterior cruciate ligament surgery and who experience post-operative motor inhibition, and in patients who have undergone anterior cruciate ligament surgery but do not experience post-operative motor inhibition. This is why this study has been initiated.

Inclusion Criteria: * Patient who has undergone ACL surgery at least 3 weeks ago * Patient with no severe knee inflammation: stroke test ≤ 1+ and pain ≤ 3/10 (EN) at rest * Patient with a Tegner score ≥ 5 * Patient with a Marx score ≥ 8 * Patient with or without a diagnosis of subjective AMI (Sonnery-Cottet et al. classification) * French-speaking patients who do not object to the use of their data Exclusion Criteria: * Patient with a previous injury or surgery to the same or opposite knee * Patient with a multi-ligament injury * Patient with an AMI \> grade 2b (Sonnery-Cottet et al. classification) * Patient with a BMI \> 30 * Pregnant or breastfeeding woman * Patient with previous or current neurological and cardiovascular disorders or diseases * Patient under legal protection: adult under guardianship, curatorship or other legal protection, deprived of liberty by judicial or administrative decision