TY - JOUR
T1 - Anterior cruciate ligament injury alters preinjury lower extremity biomechanics in the injured and uninjured leg
T2 - The JUMP-ACL study
AU - Goerger, Benjamin M.
AU - Marshall, Stephen W.
AU - Beutler, Anthony I.
AU - Blackburn, J. Troy
AU - Wilckens, John H.
AU - Padua, Darin A.
N1 - Publisher Copyright:
© 2015, BMJ Publishing Group. All rights reserved.
PY - 2015/2/1
Y1 - 2015/2/1
N2 - Background: Information as to how anterior cruciate ligament (ACL) injury and reconstructive surgery (ACLR) alter lower extremity biomechanics may improve rehabilitation and return to play guidelines, reducing the risk for repeat ACL injury. Aim: To compare lower extremity biomechanics before ACL injury and after subsequent ACLR for the injured and uninjured leg. Methods: Baseline unilateral lower extremity biomechanics were collected on the dominant leg of participants without ACL injury when they entered the Joint Undertaking to Monitor and Prevent ACL (JUMPACL) study. Thirty-one participants with subsequent ACL injury, reconstructive surgery and full return to physical activity completed repeat, follow-up biomechanical testing, as did 39 uninjured, matched controls. Not all injured participants suffered injury to the dominant leg, requiring separation of those with ACL injury into two groups: ACLR-injured leg group (n=12) and ACLR-uninjured leg group (n=19). We compared the landing biomechanics of these three groups (ACLR-injured leg, ACLR-uninjured leg, control) before ACL injury (baseline) with biomechanics after ACL injury, surgery and return to physical activity (follow-up). Results: ACL injury and ACLR altered lower extremity biomechanics, as both ACLR groups demonstrated increases in frontal plane movement (increased hip adduction and knee valgus). The ACLR-injured leg group also exhibited decreased sagittal plane loading (decreased anterior tibial shear force, knee extension moment and hip flexion moment). No high-risk biomechanical changes were observed in control group participants. Conclusions: ACL injury and ACLR caused movement pattern alterations of the injured and uninjured leg that have previously shown to increase the risk for future non-contact ACL injury.
AB - Background: Information as to how anterior cruciate ligament (ACL) injury and reconstructive surgery (ACLR) alter lower extremity biomechanics may improve rehabilitation and return to play guidelines, reducing the risk for repeat ACL injury. Aim: To compare lower extremity biomechanics before ACL injury and after subsequent ACLR for the injured and uninjured leg. Methods: Baseline unilateral lower extremity biomechanics were collected on the dominant leg of participants without ACL injury when they entered the Joint Undertaking to Monitor and Prevent ACL (JUMPACL) study. Thirty-one participants with subsequent ACL injury, reconstructive surgery and full return to physical activity completed repeat, follow-up biomechanical testing, as did 39 uninjured, matched controls. Not all injured participants suffered injury to the dominant leg, requiring separation of those with ACL injury into two groups: ACLR-injured leg group (n=12) and ACLR-uninjured leg group (n=19). We compared the landing biomechanics of these three groups (ACLR-injured leg, ACLR-uninjured leg, control) before ACL injury (baseline) with biomechanics after ACL injury, surgery and return to physical activity (follow-up). Results: ACL injury and ACLR altered lower extremity biomechanics, as both ACLR groups demonstrated increases in frontal plane movement (increased hip adduction and knee valgus). The ACLR-injured leg group also exhibited decreased sagittal plane loading (decreased anterior tibial shear force, knee extension moment and hip flexion moment). No high-risk biomechanical changes were observed in control group participants. Conclusions: ACL injury and ACLR caused movement pattern alterations of the injured and uninjured leg that have previously shown to increase the risk for future non-contact ACL injury.
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U2 - 10.1136/bjsports-2013-092982
DO - 10.1136/bjsports-2013-092982
M3 - Article
C2 - 24563391
AN - SCOPUS:84921436660
SN - 0306-3674
VL - 49
SP - 188
EP - 195
JO - British Journal of Sports Medicine
JF - British Journal of Sports Medicine
IS - 3
ER -