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Effects of a modified shoe on knee load in people with and without knee osteoarthritis.
MedLine Citation:
PMID:  23203206     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVE: To evaluate the effects of a modified shoe which incorporates both lateral wedging and a variable-stiffness sole on knee joint loading in three populations: 1) individuals with symptomatic and radiographic knee osteoarthritis (OA), 2) asymptomatic overweight individuals and 3) asymptomatic healthy weight individuals. METHODS: 90 participants (30 per group) underwent a 3-dimensional gait analysis across three testing conditions i) modified shoes, ii) standard control shoes and; iii) barefoot. For each condition, the first peak knee adduction moment (KAM) and knee flexion moment (KFM) (Nm/(BWxHT)%) and KAM impulse (Nm.s/(BWxHT)%) were determined. RESULTS: The modified shoes significantly reduced peak KAM compared to the control shoes in both the OA (p=0.002) and overweight (p=0.03) groups. For the OA group, there was no significant difference in peak KAM when walking in the modified shoe compared to barefoot (p=0.19). For the overweight and the healthy weight groups, peak KAM when walking in the modified shoe was significantly higher than when walking barefoot (p<0.001). Irrespective of group, KAM impulse was significantly reduced when walking in the modified shoe compared to the control shoe (p<0.001) and significantly higher during both shoe conditions compared to barefoot (p<0.001). There was no change in the KFM between walking conditions for any group (p>0.05). CONCLUSIONS: The findings illustrate that a shoe incorporating both a lateral wedge and variable-stiffness sole can significantly reduce parameters of medial knee joint load. Future research examining the effects of these shoes on pain, function and joint structural changes is warranted. © 2012 American College of Rheumatology.
Authors:
Kim L Bennell; Crystal O Kean; Tim V Wrigley; Rana S Hinman
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-30
Journal Detail:
Title:  Arthritis and rheumatism     Volume:  -     ISSN:  1529-0131     ISO Abbreviation:  Arthritis Rheum.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-12-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370605     Medline TA:  Arthritis Rheum     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 by the American College of Rheumatology.
Affiliation:
Centre for Health, Exercise and Sports Medicine (CHESM), Department of Physiotherapy, The University of Melbourne, Victoria, Australia. k.bennell@unimelb.edu.au.
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