dc.contributor.author |
Ward, Sarah H |
|
dc.contributor.author |
Blackburn, J Troy |
|
dc.contributor.author |
Padua, Darin A |
|
dc.contributor.author |
Stanley, Laura E |
|
dc.contributor.author |
Harkey, Matthew S |
|
dc.contributor.author |
Luc-Harkey, Brittney A |
|
dc.contributor.author |
Pietrosimone, Brian |
|
dc.coverage.spatial |
United States |
|
dc.date.accessioned |
2022-02-18T03:26:36Z |
|
dc.date.available |
2022-02-18T03:26:36Z |
|
dc.date.issued |
2018-2 |
|
dc.identifier.issn |
1062-6050 |
|
dc.identifier.uri |
https://hdl.handle.net/2292/58266 |
|
dc.description.abstract |
CONTEXT: Aberrant biomechanics may affect force attenuation at the knee during dynamic activities, potentially increasing the risk of sustaining a knee injury or hastening the development of osteoarthritis after anterior cruciate ligament reconstruction (ACLR). Impaired quadriceps neuromuscular function has been hypothesized to influence the development of aberrant biomechanics. OBJECTIVE: To determine the association between quadriceps neuromuscular function (strength, voluntary activation, and spinal-reflex and corticomotor excitability) and sagittal-plane knee biomechanics during jump landings in individuals with ACLR. DESIGN: Cross-sectional study. SETTING: Research laboratory. PATIENTS OR OTHER PARTICIPANTS: Twenty-eight individuals with unilateral ACLR (7 men, 21 women; age = 22.4 ± 3.7 years, height = 1.69 ± 0.10 m, mass = 69.4 ± 10.1 kg, time postsurgery = 52 ± 42 months). MAIN OUTCOME MEASURE(S): We quantified quadriceps spinal-reflex excitability via the Hoffmann reflex normalized to maximal muscle response (H : M ratio), corticomotor excitability via active motor threshold, strength as knee-extension maximal voluntary isometric contraction (MVIC), and voluntary activation using the central activation ratio (CAR). In a separate session, sagittal-plane kinetics (peak vertical ground reaction force [vGRF] and peak internal knee-extension moment) and kinematics (knee-flexion angle at initial contact, peak knee-flexion angle, and knee-flexion excursion) were collected during the loading phase of a jump-landing task. Separate bivariate associations were performed between the neuromuscular and biomechanical variables. RESULTS: In the ACLR limb, greater MVIC was associated with greater peak knee-flexion angle ( r = 0.38, P = .045) and less peak vGRF ( r = -0.41, P = .03). Greater CAR was associated with greater peak internal knee-extension moment (ρ = -0.38, P = .045), and greater H : M ratios were associated with greater peak vGRF ( r = 0.45, P = .02). CONCLUSIONS: Greater quadriceps MVIC and CAR may provide better energy attenuation during a jump-landing task. Individuals with greater peak vGRF in the ACLR limb possibly require greater spinal-reflex excitability to attenuate greater loading during dynamic movements. |
|
dc.format.medium |
Print-Electronic |
|
dc.language |
eng |
|
dc.publisher |
Journal of Athletic Training/NATA |
|
dc.relation.ispartofseries |
Journal of athletic training |
|
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
|
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
|
dc.subject |
Knee Joint |
|
dc.subject |
Neuromuscular Junction |
|
dc.subject |
Humans |
|
dc.subject |
Reflex |
|
dc.subject |
Cross-Sectional Studies |
|
dc.subject |
Movement |
|
dc.subject |
Isometric Contraction |
|
dc.subject |
Adult |
|
dc.subject |
Female |
|
dc.subject |
Male |
|
dc.subject |
Quadriceps Muscle |
|
dc.subject |
Anterior Cruciate Ligament Reconstruction |
|
dc.subject |
Biomechanical Phenomena |
|
dc.subject |
Anterior Cruciate Ligament Injuries |
|
dc.subject |
corticomotor excitability |
|
dc.subject |
ground reaction force |
|
dc.subject |
knee flexion |
|
dc.subject |
spinal-reflex excitability |
|
dc.subject |
Adult |
|
dc.subject |
Anterior Cruciate Ligament Injuries |
|
dc.subject |
Anterior Cruciate Ligament Reconstruction |
|
dc.subject |
Biomechanical Phenomena |
|
dc.subject |
Cross-Sectional Studies |
|
dc.subject |
Female |
|
dc.subject |
Humans |
|
dc.subject |
Isometric Contraction |
|
dc.subject |
Knee Joint |
|
dc.subject |
Male |
|
dc.subject |
Movement |
|
dc.subject |
Neuromuscular Junction |
|
dc.subject |
Quadriceps Muscle |
|
dc.subject |
Reflex |
|
dc.subject |
1106 Human Movement and Sports Sciences |
|
dc.subject |
Clinical Medicine and Science |
|
dc.subject |
Injury (total) Accidents/Adverse Effects |
|
dc.subject |
Rehabilitation |
|
dc.subject |
Neurosciences |
|
dc.subject |
Musculoskeletal |
|
dc.subject |
1106 Human Movement and Sports Sciences |
|
dc.title |
Quadriceps Neuromuscular Function and Jump-Landing Sagittal-Plane Knee Biomechanics After Anterior Cruciate Ligament Reconstruction. |
|
dc.type |
Journal Article |
|
dc.identifier.doi |
10.4085/1062-6050-306-16 |
|
pubs.issue |
2 |
|
pubs.begin-page |
135 |
|
pubs.volume |
53 |
|
dc.date.updated |
2022-01-10T00:40:23Z |
|
dc.rights.holder |
Copyright: The author |
en |
pubs.author-url |
https://www.ncbi.nlm.nih.gov/pubmed/29350554 |
|
pubs.end-page |
143 |
|
pubs.publication-status |
Published |
|
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
research-article |
|
pubs.subtype |
Journal Article |
|
pubs.elements-id |
756183 |
|
dc.identifier.eissn |
1938-162X |
|