| Electromyographic comparison of standard and modified closed-chain isometric knee extension exercises. | |
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MedLine Citation:
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PMID: 11834118 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The purpose of this study was to compare electromyographic (EMG) activity during open kinetic chain (OKC) and a modified closed kinetic chain (MCKC) knee extension exercises. Both OKC and closed kinetic chain (CKC) exercises provide benefits when devising conditioning programs; however, there are no exercises that combine the benefits of both exercises. Subjects performed maximum isometric knee extensions for both traditional OKC and MCKC knee extension exercises. Surface electrodes were placed on 8 lower-extremity muscles. One second of integrated EMG activity followed 95% maximal knee extension force. The following muscles demonstrated greater EMG activity during the MCKC vs. the OKC knee extension exercises: vastus medialis, medial hamstring, lateral hamstrings, and gluteus maximus. There was no difference between force output between the 2 conditions. This study demonstrates that modifications to traditional OKC exercises demonstrate some characteristics of CKC exercises, and therefore provide another avenue of rehabilitation or strengthening. |
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Authors:
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Timothy J Brindle; John Nyland; Kevin Ford; Alfonse Coppola; Robert Shapiro |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article |
Journal Detail:
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Title: Journal of strength and conditioning research / National Strength & Conditioning Association Volume: 16 ISSN: 1064-8011 ISO Abbreviation: J Strength Cond Res Publication Date: 2002 Feb |
Date Detail:
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Created Date: 2002-02-08 Completed Date: 2002-03-28 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9415084 Medline TA: J Strength Cond Res Country: United States |
Other Details:
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Languages: eng Pagination: 129-34 Citation Subset: IM |
Affiliation:
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Biodynamics Laboratory, University of Kentucky, Lexington, Kentucky 40506, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Compressive Strength / physiology Electromyography* Exercise / physiology* Female Humans Isometric Contraction / physiology* Knee / physiology* Leg / physiology Muscle, Skeletal / physiology* Physical Education and Training / methods |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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