The purpose of this study was to analyse the effect of a valgus knee orthosis designed for patients with knee osteoarthritis on the electromyographic activity (EMG) of seven muscles of the lower limb during gait. Twelve patients with medial knee osteoarthritis walked on a treadmill in three different conditions: without orthosis, with a knee orthosis in 4° valgus adjustment and with an orthosis in a neutral flexible adjustment. Root-mean-square (RMS) was analysed in each condition during a 150 ms pre-activation phase and during the stance phase of gait, which was divided in four sub-phases. In addition, co-contraction ratios (CCRs) were calculated between extensor/flexor, medial/lateral muscles and between agonist and antagonist muscle pairs. Significant decreases in muscle activity and CCRs were observed with the use of the knee orthosis in both adjustments compared to the condition without orthosis. Using the valgus brace, medial/lateral CCR decreased significantly during the late stance and the flexor/extensor CCR decreased significantly during the loading phase and late stance. Decreases of muscle pairs CCRs were observed with the neutral flexible adjustment. The results support the theory of a possible beneficial effect of knee braces in reducing knee loading by decreasing muscle activation and co-contraction levels, which could contribute to decelerate disease progression in patients with knee osteoarthritis.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jelekin.2012.10.007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Phase 3, 28-week, multicentre, randomised, double-blind, placebo-controlled trial (OA-10) to evaluate the efficacy and safety of a single injection of lorecivivint in the target knee joint of moderately to severely symptomatic osteoarthritis patients.
Clin Exp Rheumatol
January 2025
UMass Chan Medical School and UMass Memorial Medical Center, Boston, MA, USA.
Objectives: To assess the efficacy and safety of an intra-articular (IA) CLK/DYRK inhibitor, lorecivivint (LOR), for the treatment of moderate to severe symptomatic knee osteoarthritis (OA).
Methods: This was a Phase 3, 28-week, multicentre, double-blind, placebo-controlled study evaluating the efficacy and safety of a single IA injection of LOR. Patients with ACR-defined knee OA, Kellgren-Lawrence (KL) grades 2-3, and pain Numeric Rating Scale (NRS) ≥4 and ≤8 in the target knee were randomised (1:1) to receive LOR 0.
Phase 3, 56-week, randomised, double-blind, placebo-controlled study utilising patient-reported and radiographic outcomes evaluating the efficacy and safety of a lorecivivint injection in patients with moderate to severe knee osteoarthritis: OA-11 Study.
Clin Exp Rheumatol
January 2025
UMass Chan Medical School and UMass Memorial Medical Center, Boston, MA, USA.
Objectives: To determine the efficacy, safety, and tolerability of intraarticular (IA) lorecivivint (LOR) in the treatment of knee osteoarthritis (OA).
Methods: Patients with American College of Rheumatology criteria-defined knee OA, Kellgren-Lawrence (KL) grades 2-3, and medial Joint Space Width (JSW) by radiograph between 1.5 and 4 mm in the target knee were enrolled in this phase 3, 56-week, multicentre, double-blind, placebo-controlled study.
Introduction Total knee arthroplasty (TKA) is a widely accepted surgical intervention for patients with advanced knee osteoarthritis, aimed at reducing pain and improving functional mobility. Preoperative radiological evaluations, including assessments of joint space narrowing, osteophytes, varus/valgus deformities, and subchondral sclerosis, are essential for planning the surgery and predicting postoperative outcomes. Although extensive research has been conducted internationally, data focusing on populations in Saudi Arabia remain limited.
View Article and Find Full Text PDFKnee joint extension limitation in female patients with knee osteoarthritis affects the infrapatellar fat pad hardness and hemoglobin concentration by isometric quadriceps exercise.
Osteoarthr Cartil Open
March 2025
Graduate School of Health Sciences, Morinomiya University of Medical Sciences, Osaka, Japan.
Objective: To investigate whether there is a difference in hardness and hemoglobin concentration changes in the infrapatellar fat pad (IFP) during isometric quadriceps exercise (IQE) in patients with knee osteoarthritis (KOA) between those with and without knee extension limitation.
Design: In this cross-sectional study, data were collected at an orthopedic clinic from March 2022 to April 2023. Among patients diagnosed with KOA, those with knee joint extension range of motion <0° and >0° were defined as the limited group (n = 16) and non-limited group (n = 13), respectively.
Corrigendum to "Integrated skin metabolomics and network pharmacology to explore the mechanisms of Goupi Plaster for treating knee osteoarthritis" [J Tradit, Complementary Altern Med 14 (6) (2024) 675-686].
J Tradit Complement Med
January 2025
Key Laboratory of Basic and Application Research of Beiyao, Heilongjiang University of Chinese Medicine, Harbin, 150040, China.
[This corrects the article DOI: 10.1016/j.jtcme.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!