Influence of an unloader brace on lower limb electromyographic activity in individuals with predominant lateral osteoarthritis after anterior cruciate ligament reconstruction.
Co-contraction
Electromyography
Knee brace
Offset
Onset
Walking
Journal
Brazilian journal of physical therapy
ISSN: 1809-9246
Titre abrégé: Braz J Phys Ther
Pays: Brazil
ID NLM: 101615124
Informations de publication
Date de publication:
Historique:
received:
31
10
2018
revised:
14
05
2019
accepted:
21
05
2019
pubmed:
9
6
2019
medline:
23
9
2020
entrez:
9
6
2019
Statut:
ppublish
Résumé
To determine the immediate effects of a varus unloader knee brace on lower-limb electromyographic activity in individuals with lateral knee osteoarthritis and valgus malalignment after anterior cruciate ligament reconstruction. Electromyographic data were recorded in 19 individuals with lateral knee osteoarthritis and valgus malalignment after anterior cruciate ligament reconstruction during walking under three conditions: (i) no brace, (ii) unadjusted brace (no varus adjustment), and adjusted brace (varus adjustment). Variables of interest were statistically analyzed using repeated measures analysis of variance. There were no significant differences in muscle co-contraction between the three test conditions. The adjusted brace resulted in delayed offset of gluteus maximus (mean difference [95% CI]: 72ms [24, 119]), and earlier onset of gluteus medius (59ms [21, 97]) compared to no brace. The adjusted brace delayed onset of lateral gastrocnemius compared to no brace (53ms [28, 78]) and the unadjusted brace (39ms [7, 71]) and reduced average activation amplitude of gluteus maximus (-4mV [-6, -1]) and lateral gastrocnemius (-9mV [-16, -2]) compared to no brace. The unloader brace did not produce significant changes in muscle co-contraction in individuals with lateral knee osteoarthritis and valgus malalignment after anterior cruciate ligament reconstruction. Significant changes in gluteal and gastrocnemius muscle activation timing and amplitude were observed, however, it is not clear whether these changes are of clinical importance.
Identifiants
pubmed: 31175006
pii: S1413-3555(18)30925-0
doi: 10.1016/j.bjpt.2019.05.004
pmc: PMC7352036
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
342-348Informations de copyright
Copyright © 2019. Publicado por Elsevier Editora Ltda.
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