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  • Mechanism of Anterior Cruciate Ligament Loading during Dynamic Motor Tasks

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    Nasseri476076-Accepted.pdf (617.1Kb)
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    Accepted Manuscript (AM)
    Author(s)
    Nasseri, Azadeh
    Lloyd, David G
    Bryant, Adam L
    Headrick, Jonathon
    Sayer, Timothy
    Saxby, David J
    Griffith University Author(s)
    Nasseri, Azadeh
    Saxby, David J.
    Headrick, Jonathon
    Lloyd, David
    Year published
    2021
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    Abstract
    INTRODUCTION: This study determined anterior cruciate ligament (ACL) force and its contributors during a standardized drop-land-lateral jump task using a validated computational model. METHODS: Three-dimensional whole-body kinematics, ground reaction forces, and muscle activation patterns from eight knee-spanning muscles were collected during dynamic tasks performed by healthy recreationally active females (n=24). These data were employed in a combined neuromusculoskeletal and ACL force model to determine lower limb muscle and ACL forces. RESULTS: Peak ACL force (2.3±0.5 BW) was observed at ~14% of stance during the ...
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    INTRODUCTION: This study determined anterior cruciate ligament (ACL) force and its contributors during a standardized drop-land-lateral jump task using a validated computational model. METHODS: Three-dimensional whole-body kinematics, ground reaction forces, and muscle activation patterns from eight knee-spanning muscles were collected during dynamic tasks performed by healthy recreationally active females (n=24). These data were employed in a combined neuromusculoskeletal and ACL force model to determine lower limb muscle and ACL forces. RESULTS: Peak ACL force (2.3±0.5 BW) was observed at ~14% of stance during the drop-land-lateral jump. The ACL force was primarily generated through the sagittal plane and muscle was the dominant source of ACL loading. The main ACL antagonists (i.e., loaders) were the gastrocnemii and quadriceps, while the hamstrings were the main ACL agonists (i.e., supporters). CONCLUSION: Combining neuromusculoskeletal and ACL force models, the roles of muscle in ACL loading and support were determined during a challenging motor task. Results highlighted the importance of the gastrocnemius in ACL loading, which could be considered more prominently in ACL injury prevention and rehabilitation programmes.
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    Journal Title
    Medicine & Science in Sports & Exercise
    DOI
    https://doi.org/10.1249/MSS.0000000000002589
    Copyright Statement
    © 2021 LWW. This is a non-final version of an article published in final form in Medicine and Science in Sports and Exercise 2021. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal link for access to the definitive, published version.
    Subject
    Biomechanical engineering
    Biomechanics
    Human biophysics
    Sports medicine
    Publication URI
    http://hdl.handle.net/10072/403462
    Collection
    • Journal articles

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