Document Detail


Effects of progressive resistance strength training on knee biomechanics during single leg step-up in persons with mild knee osteoarthritis.
MedLine Citation:
PMID:  21514018     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: The goal of this study was to determine if increasing strength in primary knee extensors and flexors would directly affect net knee joint moments during a common functional task in persons with knee osteoarthritis.
METHODS: An exploratory single sample clinical trial with pre-post treatment measures was used to study volunteers with clinical diagnosis of mild knee osteoarthritis (OA) in one knee. Subjects participated in an individually supervised training program 3 times a week for eight weeks consisting of progressive resistive exercises for knee extensors and knee flexors. Pre and post training outcome assessments included: 1. Net internal knee joint moments, 2. Electromyography of primary knee extensors and flexors, and 3. Self-report measures of knee pain and function. The distribution of lower extremity joint moments as a percent of the total support moment was also investigated.
FINDINGS: Pain, symptoms, activities of daily life, quality of life, stiffness, and function scores showed significant improvement following strength training. Knee internal valgus and hip internal rotation moments showed increasing but non-statistically significant changes post-training. There were no significant differences in muscle co-contraction activation of the Quadriceps and Hamstrings.
INTERPRETATION: While exercise continues to be an important element of OA management, the results of this study suggest improvements in function, pain, and other symptoms, as a result of strength training may not be causally related to specific biomechanical changes in net joint moments.
Authors:
Kevin James McQuade; Anamaria Siriani de Oliveira
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2011-04-21
Journal Detail:
Title:  Clinical biomechanics (Bristol, Avon)     Volume:  26     ISSN:  1879-1271     ISO Abbreviation:  Clin Biomech (Bristol, Avon)     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-07-18     Completed Date:  2012-04-17     Revised Date:  2013-06-30    
Medline Journal Info:
Nlm Unique ID:  8611877     Medline TA:  Clin Biomech (Bristol, Avon)     Country:  England    
Other Details:
Languages:  eng     Pagination:  741-8     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
Affiliation:
Department of Rehabilitation Medicine, Physical Therapy Program, University of Washington, Seattle, WA, USA. kmcquade@u.washington.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Female
Humans
Knee Joint / physiopathology*
Male
Middle Aged
Muscle Contraction*
Muscle, Skeletal / physiopathology*
Osteoarthritis, Knee / physiopathology*,  rehabilitation*
Range of Motion, Articular*
Resistance Training / methods*
Torque
Treatment Outcome
Grant Support
ID/Acronym/Agency:
R03 HD043258-01A1/HD/NICHD NIH HHS; R03 HD043258-02/HD/NICHD NIH HHS; R03 PROJECT #04-3978-E/A 04//PHS HHS
Comments/Corrections

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