| In-shoe center of pressure: Indirect force plate vs. direct insole measurement. | |
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MedLine Citation:
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PMID: 22938890 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: In-shoe center of pressure (COP) measurement is essential in biomechanics. COP can be measured directly utilizing pressure-sensitive insoles, or calculated indirectly via force plate-generated data. While the latter does not require the use of additional measurement hardware (shoe insoles), its precision at calculating in-shoe COP has not been determined. Our purpose was to ascertain the precision of force plate in-shoe COP calculations and enhance their accuracy through a mathematical algorithm. METHODS: Twelve male students participated in the study. In-shoe COP was measured synchronously via the Pedar-X insole system and AMTI force plates, comparing the measurements of both systems. A mathematical algorithm was created to improve agreement between the systems and comparisons were recalculated. RESULTS: The two methods showed different measurements of in-shoe COP. The medio-lateral (ML) and anterior-posterior (AP) Pearson correlation coefficients between systems were 0.44±0.35 and 0.99±0.01, and the ML and AP RMS errors were 6.3±3.0mm and 43.0±12.5mm, respectively. Using a mathematical algorithm, the differences between the measurements of each system could be reduced significantly (all P<0.001). CONCLUSIONS: Without adjustment, force plates give an approximate location of the COP. Using an adjustment model greatly improves the accuracy of the COP trajectory during stance. |
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Authors:
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Eytan M Debbi; Alon Wolf; Yulia Goryachev; Ziva Yizhar; Elhanan Luger; Ronen Debi; Amir Haim |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-8-28 |
Journal Detail:
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Title: Foot (Edinburgh, Scotland) Volume: - ISSN: 1532-2963 ISO Abbreviation: Foot (Edinb) Publication Date: 2012 Aug |
Date Detail:
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Created Date: 2012-9-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9109564 Medline TA: Foot (Edinb) Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 Elsevier Ltd. All rights reserved. |
Affiliation:
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Biorobotics and Biomechanics Lab, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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