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Tytuł:
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Suppressed quadriceps fascicle behavior is present in the surgical limbs of those with a history of ACL reconstruction.
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Autorzy:
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Davi SM; Department of Kinesiology, The University of Connecticut, Storrs, CT, United States.
Brancati RJ; University of Massachusetts, Amherst, MA, United States.
DiStefano LJ; Department of Kinesiology, The University of Connecticut, Storrs, CT, United States.
Lepley AS; School of Kinesiology, University of Michigan, Ann Arbor, MI, United States.
Lepley LK; School of Kinesiology, University of Michigan, Ann Arbor, MI, United States. Electronic address: .
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Źródło:
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Journal of biomechanics [J Biomech] 2021 Dec 02; Vol. 129, pp. 110808. Date of Electronic Publication: 2021 Oct 11.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: New York ; Oxford : Elsevier Science
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MeSH Terms:
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Anterior Cruciate Ligament Injuries*/diagnostic imaging
Anterior Cruciate Ligament Injuries*/surgery
Anterior Cruciate Ligament Reconstruction*
Humans ; Knee ; Knee Joint ; Muscle Strength ; Quadriceps Muscle/diagnostic imaging ; Torque
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Contributed Indexing:
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Keywords: Anterior cruciate ligament; Fascicle Behavior; Muscle morphology; Quadriceps weakness
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Entry Date(s):
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Date Created: 20211019 Date Completed: 20211231 Latest Revision: 20211231
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Update Code:
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20240105
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DOI:
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10.1016/j.jbiomech.2021.110808
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PMID:
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34666248
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The balance of published data have largely focused on adaptations in muscle and fiber size after anterior cruciate ligament reconstruction (ACLR), failing to account for the dynamic changes in the behavior of the muscles' contractile elements that strongly contribute to force production. To better understand the sources of quadriceps dysfunction, the purpose of our research was to determine if alterations in fascicle behavior are present after ACLR. Unilateral ACLR individuals (9 m/9f; 21 ± 3 yrs; 1.74 ± 0.12 m;71.58 ± 13.31 kg; months from surgery:38 ± 36) and healthy controls (3 m/6f; 23 ± 2 yrs; 1.67 ± 0.10 m; 63.51 ± 10.11 kg) participated. In-vivo vastus lateralis fascicle behavior was recorded using ultrasonography during three maximal isokinetic knee extensions (60°·s -1 ). Fascicle length, angle, and shortening velocity were calculated and analyzed from rest to peak torque. Peak knee extension torque was averaged between isokinetic trials (Nm·kg -1 ). Group by limb interactions were assessed using separate two-way analyses of variance and were further evaluated by comparing 95% confidence intervals where appropriate. Significant interactions were present for fascicle angle at peak torque (P = 0.01), fascicle length excursion (P = 0.05), fascicle angle excursion (P < 0.01), fascicle shortening velocity (P = 0.05) and strength (P = 0.03). Upon post-hoc evaluation, the surgical limb displayed altered in-vivo fascicle behavior compared to all limbs (P < 0.05) and reduced strength compared to the contralateral and right control limbs (P < 0.05). No other significant interactions were present (P > 0.05). Our data show that those with a history of ACLR have fascicles that are slower, lengthen less and operate with lower angles relative to the axis of force production. Altered fascicle behavior after ACLR may be an important underlying factor to explaining the protracted quadriceps dysfunction.
(Copyright © 2021. Published by Elsevier Ltd.)
