سحر استادرحيمي

The anterior cruciate ligament (ACL) re-injury following reconstruction is more probable in professional football players. These injuries have significant affects on athletes’ career. In previous studies, different test procedures have been proposed to determine whether or not to return to sport after the ACLR in order to enhance the injury prevention and rehabilitation programs. however, the athletes' readiness to return to sport is still challenging because there are no standard objective measures to determine the patients' readiness. Six professional male football players voluntarily participated in this study whom three of them had experienced ACL injury with Hamstrings graft reconstruction. This cross-sectional study characterized the knee joint flexion angle, knee reaction force and muscle activation force deference between the lower limbs after the ACLR and the non-injured group using in-vivo biomechanical simulations. It was observed that that all three ACLR subjects experienced the injury in their dominant leg. there was a significant difference between the peak knee flexion angle (PKFA) of the gait cycle in the ACLR and control groups and the contact force loading from the tibia on the femur was more in the dominant leg compared to the non-dominant leg in both ACLR and control groups. Also, in the control group had higher biceps femoris, vastus lateralis, and gastrocnemius medialis and lower rectus femoris activity in their non-dominant leg compared to the dominant leg, whereas the subjects in the ACLR group had higher biceps femoris, vastus lateralis, and rectus femoris and lower gastrocnemius medialis their non-dominant leg compared to the dominant leg. We presented an index for assessing the risk of ACL injury in professional football players and a solution by grouping patients in a safe, Low and high-risk groups to prevent them from experiencing re-injury after the ACL reconstruction. The limitations of this study need to be taken into consideration before drawing any conclusions. Thus, future research could eva‎luate the differences in the autograft rest length in each subject using an MRI test before performing the simulation and examine more athletes with all types of autografts and may make the suggested IRI more comprehensive and general for the assessment of the return to sport status of athletes with ACL injury.

بازسازي رباط صليبي قدامي , آناليز گيت , بازگشت به ورزش , شبيه سازي اسكلتي-عضلاني , اوپنسيم

ACLR , Gait analysis , Return-to-sport , Musculoskeletal Simulation , Opensim

Sahar Ostadrahimi

Siavash Kazemirad