The anterior cruciate ligament (ACL) injury is common in athletes aged 18 to 35. ACL reconstruction (ACLR) aims to restore knee stability in the process of returning to sports. Post-surgical rehabilitation focuses on optimizing biomechanical parameters, with neuromuscular and functional tests assessing muscle strength, proprioception, and dynamic stability. Isokinetic allows the measurement of muscle strength symmetry and proprioception, while the single-leg hop and landing tasks assess functional stability and are predictive of sports resumption and injury prevention. Despite progress, concerns remain about neuromuscular factors impacting knee stability, especially during landings, which can increase the risk of secondary ACL injuries. This study proposes examining knee strength and proprioception using isokinetic dynamometry, alongside biomechanical assessments from functional tests, to explore their relationship to biomechanical features during landings, at 6-to-12 months post-ACL reconstruction. The hypothesis is that better muscle strength and proprioception correlate with improved knee control during landing tasks.
Study Type
OBSERVATIONAL
Enrollment
25
All sports patients who had a muscle evaluation in addition to functional testing at 6-12 months after ACLR since March 2024
CHU Caen Normandie
Caen, France
RECRUITINGPassive proprioceptive evaluation
Measurement of knee proprioception by the passive repositioning technique (JPS, in degrees) on isokinetic dynamometer.
Time frame: One measurement during the visit at 6 to 12 months after surgery
Strength
Measurement of knee extensors and flexors peak strength (in newton.meter, Nm) on isokinetic dynamometer.
Time frame: One measurement during the visit at 6 to 12 months after surgery
Single Hop test
Measurement of knee position during landing from a single leg hop task
Time frame: One measurement during the visit at 6 to 12 months after surgery
Single-leg landing task
Measurement of knee position during landing from a 30-cm box
Time frame: One measurement during the visit at 6 to 12 months after surgery
Single Hop for Distance
The total distance is recorded (in cm)
Time frame: One measurement during the visit at 6 to 12 months after surgery
ACL-RSI questionnaire (Anterior Cruciate Ligament-Return to Sport after Injury)
The ACL-RSI measures the patient's understanding of his knee. It comprises 12 questions with a score of 1 to 10 for each
Time frame: One measurement during the visit at 6 to 12 months after surgery
Landing Error Scoring System (LESS)
The LESS (Landing Error Scoring System) scale is a 13-item tool used to assess landing technique during a hop task.
Time frame: One measurement during the visit at 6 to 12 months after surgery
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