The relationship between external knee moments and muscle co-activation in subjects with medial knee osteoarthritis

Selistre, LFA, Mattiello, SM, Nakagawa, TN, Gonçalves, GH, Petrella, M and Jones, R 2017, 'The relationship between external knee moments and muscle co-activation in subjects with medial knee osteoarthritis' , Journal of Electromyography & Kinesiology .

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Abstract

Purpose: External knee moments are reliable to measure knee load but it does not take into account muscle activity. Considering that muscle co-activation increases compressive forces at the knee joint, identifying relationships between muscle co-activations and knee joint load would complement the investigation of the knee loading in subjects with knee osteoarthritis. The purpose of this study was to identify relationships between muscle coactivation and external knee moments during walking in subjects with medial knee osteoarthritis. Methods: 19 controls (11 males, aged 56.6 ±5, and BMI 25.2 ± 3.3) and 25 subjects with medial knee osteoarthritis (12 males, aged 57.3 ± 5.3, and BMI 28.2 ± 4) were included in this study. Knee adduction and flexion moments, and co-activation (ratios and sums of quadriceps, hamstring, and gastrocnemius) were assessed during walking and compared between groups. The relationship between knee moments and co-activation was investigated in both groups. Findings: subjects with knee osteoarthritis presented a moderate and strong correlation between co-activation (ratios and sums) and knee moments. Interpretation: Muscle co-activation should be used to measure the contribution of quadriceps, hamstring, and gastrocnemius on knee loading. This information would cooperate to develop a more comprehensive approach of knee loading in this population.

Item Type: Article
Schools: Schools > School of Health Sciences > Centre for Health Sciences Research
Journal or Publication Title: Journal of Electromyography & Kinesiology
Publisher: Elsevier
ISSN: 1050-6411
Related URLs:
Depositing User: Prof Richard Jones
Date Deposited: 26 Jan 2017 09:34
Last Modified: 09 Aug 2017 18:57
URI: http://usir.salford.ac.uk/id/eprint/41262

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