Activation Failure of Knee Extensors After Anterior Cruciate Ligament Rupture Depending on the Contraction Mode

Inclusion Criteria

• •A. ACL-injured groups (surgically or conservatively treated):
• •1. Age between 18 and 50 years
• •2. Free, informed consent signed by the participant and the investigator.
• •3. Session 1: Delay of 2 to 6 weeks after injury, with a quiet knee (range of motion 110- 0°, minimal effusion, maximal contraction pain ≤ 2/10)
• •4. Session 2: Duration of 36 to 42 weeks after injury, with a quiet knee (range of motion 110-0°, minimal effusion, maximal contraction pain ≤ 2/10)
• •5. Independent person (Unprotected: under guardianship, curatorship or other legal protection, deprived of liberty by judicial or administrative decision)
• •B. ControlGroup:
• •1. Age between 18 and 50 years
• •2. Free, informed consent signed by the participant and the investigator.
• •3. Sport practitioners: at least once per week practicing activities like collective sports, racket sports, combat sports, skiing, or on-loading activities with changing of directions.
• •4. Independent person (Unprotected: under guardianship, curatorship or other legal protection, deprived of liberty by judicial or administrative decision)