Changes in Landing Mechanics in Patients Following Anterior Cruciate Ligament Reconstruction When Wearing an Extension Constraint Knee Brace

Butler, Robert J.; Dai, Boyi; Garrett, William E.; Queen, Robin M.

doi:10.1177/1941738114524910

Cited by 26 publications

(28 citation statements)

References 35 publications

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“…Previous studies have shown that knee braces may improve functional performance during tasks such as single limb balance in individuals with ACL injuries [12,13]. Butler et al [14] also showed changes in landing mechanics in patients following ACL reconstruction while wearing a brace. To date no study has determined the size and nature of the effects of using proprioceptive knee bracing during more dynamic tasks on 3D knee mechanics.…”

Section: Introductionmentioning

confidence: 98%

The effect of proprioceptive knee bracing on knee stability during three different sport related movement tasks in healthy subjects and the implications to the management of Anterior Cruciate Ligament (ACL) injuries

et al. 2016

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(2016) The effect of proprioceptive knee bracing on knee stability during three different sport related movement tasks in healthy subjects and the implications to the management of Anterior Cruciate Ligament (ACL) injuries. Gait and Posture, 48 . pp. 165 170. ISSN 0966 6362 It is advisable to refer to the publisher's version if you intend to cite from the work. Objective: This study aimed to explore if such improvements in stability may be seen during faster sports specific tasks as well as slower tasks. Method: Twelve subjects performed a slow step down, single leg drop jump and pivot turn jump with and without a silicone web brace. 3D kinematics of the knee were collected using a ten camera Qualisys motion analysis system. Reflective markers were placed on the foot, shank, thigh and pelvis using the Calibrated Anatomical Systems Technique. A two way ANOVA with repeated measures was performed with post-hoc pairwise comparison to explore the differences between the two conditions and three tasks. Results: Significant differences were seen in the knee joint angles and angular velocities in the sagittal, coronal and transverse planes between the tasks. The brace showed a reduction in knee valgum and internal rotation across all tasks, with the most notable effect during the single leg drop jump and pivot turn jump. The transverse plane also showed a significant reduction in the external rotation knee angular velocity when wearing the brace. Discussion: The brace influenced the knee joint kinematics in coronal and transverse planes which confirms that such braces can have a significant effect on knee control during dynamic tasks. Further studies are required exploring the efficacy of proprioceptive braces in athletic patient cohort. Acknowledgements This study is partly founded by Erasmus+ program who have sponsored two masters students. The braces were supplied by DJO Global, Inc. The suppliers played no role in the design, execution, analysis and interpretation of the data or writing of this study.2

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Section: Introductionmentioning

confidence: 98%

The effect of proprioceptive knee bracing on knee stability during three different sport related movement tasks in healthy subjects and the implications to the management of Anterior Cruciate Ligament (ACL) injuries

et al. 2016

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“…Asymmetries in loading and movement patterns between limbs can be present up to 2 years after reconstruction contributing to increased risk for ACL re‐injury to both the surgical and non‐surgical limb . ACLR patients have a tendency to land with increased knee abduction moments and knee extension, as well as decreased peak knee flexion moments, and vertical ground reaction forces .…”

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confidence: 99%

Limb asymmetry during recovery from anterior cruciate ligament reconstruction

Renner

Franck

Miller

et al. 2018

Journal Orthopaedic Research

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There is limited literature that follows a population of Anterior Cruciate Ligament Reconstruction (ACLR) patients through recovery. Our aim was to examine differences in movement and loading patterns across time and between limbs over four visits during 12 months post-ACLR. We hypothesized that kinematic and kinetic data during a stop-jump would have time- and limb-dependent differences through 12 months post-surgery. Twenty-three ACLR athletes performed five vertical stop-jumps at 4, 5, 6, and 12 months post-op with motion capture and force plate data collection. The peak knee flexion (PKF) was different between the 4 and 12, 5 and 6, and the 5 and 12 month visits with earlier months exhibiting higher PKF. The peak vertical ground reaction force (vGRF) was lower at 4 than at 5 and 6 months. The peak posterior ground reaction force (pGRF) was lower at 4 months than all other visits. Frontal knee and sagittal hip range of motion (ROM) were different between 12 months and each previous visit. Asymmetries were present in peak vGRF, peak knee extension moment and impulse up to 12 months. The loading rate and peak pGRF demonstrated between limb differences up to 6 months; limb stiffness demonstrated differences up to 5 months post-ACLR. PKF was only asymmetric at the 4 month visit. While some variables improved in the 12 months post-ACLR, limb asymmetries in peak knee extension moment, peak vGRF and impulse persisted up to 12 months. Additionally, frontal plane knee and sagittal hip ROM had not normalized at 12 months. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:1887-1893, 2018.

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“… 16 , 23 , 35 There is evidence that brace wear may improve movement mechanics during walking and running by increasing knee flexion 8 , 41 and during cutting by increasing knee flexion velocity at initial contact. 8 , 9 Additional research has shown that braces improve jumping mechanics such as bilateral landing symmetry 6 and vertical jump height. 33 One study found that hop distance symmetry improved with time and a braced condition, which suggests that both time and bracing may not only improve physical performance but also help prevent additional injury.…”

Section: Discussionmentioning

confidence: 99%

Physical Performance Improves With Time and a Functional Knee Brace in Athletes After ACL Reconstruction

Dickerson

Peebles

Moskal

et al. 2020

Orthopaedic Journal of Sports Medicine

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Background: Athletes who return to sport (RTS) after anterior cruciate ligament reconstruction (ACLR) often have reduced physical performance and a high reinjury rate. Additionally, it is currently unclear how physical performance measures can change during the RTS transition and with the use of a functional knee brace. Purpose/Hypothesis: The purpose of this study was to examine the effects of time since surgery (at RTS and 3 months after RTS) and of wearing a brace on physical performance in patients who have undergone ACLR. We hypothesized that physical performance measures would improve with time and would not be affected by brace condition. Study Design: Controlled laboratory study. Methods: A total of 28 patients who underwent ACLR (9 males, 19 females) completed physical performance testing both after being released for RTS and 3 months later. Physical performance tests included the modified agility t test (MAT) and vertical jump height, which were completed with and without a knee brace. A repeated-measures analysis of variance determined the effect of time and bracing on performance measures. Results: The impact of the knee brace was different at the 2 time points for the MAT side shuffle ( P = .047). Wearing a functional knee brace did not affect any other physical performance measure. MAT times improved for total time ( P < .001) and backpedal ( P < .001), and vertical jump height increased ( P = .002) in the 3 months after RTS. Conclusion: The present study showed that physical performance measures of agility and vertical jump height improved in the first 3 months after RTS. This study also showed that wearing a knee brace did not hinder physical performance. Clinical Relevance: Wearing a functional knee brace does not affect physical performance, and therefore a brace could be worn during the RTS transition without concern. Additionally, physical performance measures may still improve 3 months past traditional RTS, therefore justifying delayed RTS.

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Changes in Landing Mechanics in Patients Following Anterior Cruciate Ligament Reconstruction When Wearing an Extension Constraint Knee Brace

Cited by 26 publications

References 35 publications

The effect of proprioceptive knee bracing on knee stability during three different sport related movement tasks in healthy subjects and the implications to the management of Anterior Cruciate Ligament (ACL) injuries

The effect of proprioceptive knee bracing on knee stability during three different sport related movement tasks in healthy subjects and the implications to the management of Anterior Cruciate Ligament (ACL) injuries

Limb asymmetry during recovery from anterior cruciate ligament reconstruction

Physical Performance Improves With Time and a Functional Knee Brace in Athletes After ACL Reconstruction

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