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Increased movement variability in one-leg hops about 20 years after treatment of anterior cruciate ligament injury
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Physiotherapy. Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Physiotherapy.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Physiotherapy.ORCID iD: 0000-0002-0366-4609
2018 (English)In: Clinical Biomechanics, ISSN 0268-0033, E-ISSN 1879-1271, Vol. 53, p. 37-45Article in journal (Refereed) Published
Abstract [en]

Background: Recent studies highlight the need for understanding movement control of adjacent joints when evaluating knee function following anterior cruciate ligament (ACL) injury. However, while short-term adaptations to lower-extremity joint coupling have been studied, little is known about any potential long-term adaptations in neuromuscular control displayed by ACL-injured individuals. The aim of our study was to determine whether coordination variability of the hip-knee joint couplings during the one-leg hop is altered about 20 years after injury in two ACL-injured groups compared to healthy knee controls.

Methods: Seventy persons performed one leg hops ~23 years after ACL injury and following different treatments: 33 participants treated with physiotherapy in combination with ACL-reconstruction (ACLR); 37 participants with physiotherapy alone (ACLPT). They were compared to 33 matched controls. A vector coding procedure was used to create joint couplings for knee and hip angles on all the cardinal planes for the Take-off and Landing phases. The standard deviation of each coupling was computed as a measure of coordination variability.

Findings: Both the ACL groups differed significantly from controls on their injured side with ~50% higher knee abduction-adduction/hip internal-external rotation variability during the Take-off phase; ~33% higher knee abduction-adduction/knee flexion-extension variability and greater knee abduction-adduction/hip flexion-extension variability (ACLR 50%; ACLPT 80%) during the Landing phase. There were no major differences between injured and non-injured sides in any group.

Interpretation: Increased variability in lower-extremity joint couplings has emerged as a conspicuous feature of ACL injured persons in the very long term compared to non-injured controls, independent of treatment. Further research of the processes leading to alterations in movement variability using longitudinal studies would facilitate better understanding of the functional adaptations leading to knee dysfunction in the short- and long-term after ACL injury.

Place, publisher, year, edition, pages
2018. Vol. 53, p. 37-45
Keywords [en]
vector coding, movement variability, kinematics, ACL reconstruction, physiotherapy
National Category
Physiotherapy
Research subject
physiotherapy
Identifiers
URN: urn:nbn:se:umu:diva-144718DOI: 10.1016/j.clinbiomech.2018.02.003PubMedID: 29433043OAI: oai:DiVA.org:umu-144718DiVA, id: diva2:1182048
Available from: 2018-02-12 Created: 2018-02-12 Last updated: 2018-06-09Bibliographically approved

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Srinivasan, DivyaTengman, EvaHäger, Charlotte K.

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