Anterior Cruciate Ligament Injuries, Muscle Weakness
Conditions
Brief summary
Anterior cruciate ligament (ACL) tear is a frequent and devastating injury in sport, especially in pivoting-contact disciplines. In many cases, athletes will undergo an ACL reconstruction (ACL-R) for recovering knee stability, preventing further injuries and returning to sport (RTS). Among the criteria for RTS, knee muscle strength is the most used objective criteria and especially the symmetry of knee flexors and/or extensors between the operated and uninjured knee. Isokinetic testing of knee muscle strength is considered as a reference for knee muscle testing during the follow up stages after ACL-R. This evaluation allows to measure the strength (torque) of knee flexors and extensors at several angular velocities. However, there is no relevant litterature about the force-velocity (Fo-v) relationship of knee flexors and extensors after ACL-R. The present study aimed to evaluate and test the differences between the Fo-v relationship parameters between the operated and uninjured knees at 4 months and 8 months after ACL-R, using the 2-points method with isokinetic testing. Also, the investigators aimed to test the impact of the type of surgery (patellar tendon autograft vs. hamstring tendon autograft) on the Fo-v relationship after ACL-R
Interventions
OTHERFollow-up after Anterior cruciate ligament reconstruction
The patients were referred to the sport medicine department for the post ACL-R follow-up including isokinetic knee muscle strength evaluations at 4 months and 8.months after the surgery
Sponsors
University Hospital, Caen
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
16 Years to 55 Years
Healthy volunteers
No
Inclusion criteria
* Patients who have had an ACL reconstruction surgery (isolated or associated with other meniscal or ligamentary surgery) * Patient included in the sport medicine follow-up protocole with intermediate and final isokinetic muscular assessment at 4 months and8 months after surgery respectively * Patients who completed both tests at the 60°/s and 240°/s velocities
Exclusion criteria
* Patient who did not participate in all follow-up consultations and isokinetic muscular assessments * Cognitive or sensory impairment making it impossible to understand the information form * Neurological, traumatic or osteoarticular history responsible for muscle imbalance prior to surgery
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in strength | Time Frame: ACL group: Two evaluations on both injured and healthy knees: (1) 4 months after surgery and (2) 8 months after surgery; Routine practice following guidelines | Measurement of knee extensors and flexors peak strength (in newton.meter, Nm) on isokinetic dynamometer at two angular velocities of 60°/s and 240°/s respectively |
| Change in the force-velocity relationship | Time Frame: ACL group: Two evaluations on both injured and healthy knees: (1) 4 months after surgery and (2) 8 months after surgery; Routine practice following guidelines | Calculation of the corresponding slope and maximal force (Y-intercept) of the regression line of the force-velocity curve |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Individual characteristics | Time Frame: ACL group: Two evaluations on both injured and healthy knees: (1) 4 months after surgery and (2) 8 months after surgery; Routine practice following guidelines | Personal characteristics recorded in the medical report as age, gender, type of sport and sport level of practice and return to sport after the surgery |
| Injury characteristics | Time Frame: ACL group: Two evaluations on both injured and healthy knees: (1) 4 months after surgery and (2) 8 months after surgery; Routine practice following guidelines | Injury characteristics recorded in the medical report as the type of injury (ACL only, ACL and meniscus, ACL with other ligament injury, recurrent ACL injury) the time before surgery, the type of rehabilitation before and after surgery |
| Surgery characteristics | Time Frame: ACL group: Two evaluations on both injured and healthy knees: (1) 4 months after surgery and (2) 8 months after surgery; Routine practice following guidelines | Surgery characteristics recorded in the medical report as the type of surgery, the surgery duration and tourniquet time |
Countries
France
Outcome results
None listed