| Electromyographic and kinetic analysis of traditional, chain, and elastic band squats. | |
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MedLine Citation:
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PMID: 12423183 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study examined mean integrated electromyography (I-EMG) for the quadriceps and hamstring muscle groups, as well as mean and peak vertical ground reaction forces (GRFs), for 3 conditions of the back squat. Conditions included (a) squat with barbell and weight plates, (b) squat with barbell and weight plates plus chains hung on each end of the barbell to replace approximately 10% of the squat load, and (c) squat with barbell and weight plates plus elastic bands offering resistance equivalent to approximately 10% of the squat load. Weight plates equal to the load added by either the chains or elastic bands were removed for the latter 2 squat conditions. Vertical GRFs were obtained during a single testing session for all 3 squat conditions. The tests were performed on a 2-cm thick aluminum platform (0.76 x 1.0 m) bolted directly to a force plate (OR6-5-2000, AMTI, Watertown, MA). Surface electrode I-EMG data from the quadriceps and hamstrings were recorded at 500 Hz. The exercise order was randomly determined for 11 NCAA Division I athletes who had experience using these types of squats. A repeated measures analysis of covariance revealed no differences in I-EMG and GRF during the eccentric or concentric phase for any of the 3 squat conditions. Analyses showed that mean GRF and I-EMG was significantly different between eccentric and concentric phases for all groups. The results question the usefulness of performing squats combining barbell and weight plates with chain and elastic resistance. |
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Authors:
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William P Ebben; Randall L Jensen |
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Publication Detail:
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Type: Comparative Study; 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 Nov |
Date Detail:
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Created Date: 2002-11-08 Completed Date: 2003-03-18 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: 547-50 Citation Subset: IM |
Affiliation:
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Department of Physical Therapy/Exercise Science Degree Program, Marquette University, Milwaukee, Wisconsin 53201, USA. webben70@hotmail.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Electromyography* Exercise / physiology* Female Humans Kinetics Lower Extremity Male Multivariate Analysis Muscle Contraction / physiology Muscle, Skeletal / physiology* Physical Endurance / physiology Probability Sensitivity and Specificity |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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