Tolerance, Efficacy, revAlidation, Myostim

Inclusion Criteria: * Male between the age of 18 and 40 * BMI (Body Mass Index) ≤ 27 * Candidates for ACL reconstruction surgery of DIDT (Droit Interne et du Demi Tendineux) type * Able to follow the instruction of the study, to go to the postoperative visits to the investigator, to go to the isokinetic and to the MRI visits * Having signed an informed consent Exclusion Criteria: Related to the pathology: * Patient who have undergone previous ACL reconstruction surgery on the same knee * Patient who have participated to a therapeutic clinical study 3 months before inclusion * Patient who plan to follow a workout or a revalidation program after surgery different from classical physiotherapy prescribed by the orthopedic surgeon * Contralateral limb suffered from trauma, surgery, fracture, tear, tendinopathy, sepsis or immobilization for more than 3 weeks during the last 5 years Related to treatment: * Patient who have eaten doping substances or food supplement building mass and muscle strength during 3 months before inclusion excepted for creatine and beta-alanine for which the washout period is of 6 month before inclusion * Patient who were treated with antibiotics in the month preceding the inclusion * Patient treated with pharmacologic agents like statins, immunosuppressors or anti-malaria * Patient taking androgens (steroids…) * Patient under treatments which may interfere with the neuromuscular system * Patient who were treated with analgesic or non-steroidal anti-inflammatory drugs (NSAIDS) 24 hours before inclusion visit Related to associated diseases: * Patient with associated uncontrolled severe disease: severe liver or kidney disease, severe and uncontrolled cardiovascular disease, HIV, B or C hepatitis, tumor * Patient with thromboembolism disorders * Patient with inflammatory bowel disease * Anorexic patient * Diabetic patient * Patient with traumatic, neurologic or rheumatic history of the lower limbs Related to patient: * Allergy or contraindication to soy, milk, gluten, nuts or wheat * Forecasting a high protein diet during the study * Under guardianship or judicial protection Related to MRI counter-indication: * Patient with a pacemaker, an implantable defibrillator, neurosurgical clips, a neurostimulator, cochlear implant, a stent from less than 3 weeks, an insulin pump * Patient with a ferromagnetic splinter in the body, or having wire sutures * Serious mobility problem (Parkinson, tremors) * Claustrophobia Related to impedancemeter test: • Patient with a metal plate at the right ankle