| The effect of stance width on the electromyographical activity of eight superficial thigh muscles during back squat with different bar loads. | |
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MedLine Citation:
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PMID: 19130646 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Many strength trainers believe that varying the stance width during the back squat can target specific muscles of the thigh. The aim of the present work was to test this theory measuring the activation of 8 thigh muscles while performing back squats at 3 stance widths and with 3 different bar loads. Six experienced lifters performed 3 sets of 10 repetitions of squats, each one with a different stance width, using 3 resistances: no load, 30% of 1-repetition maximum (1RM), and 70% 1RM. Sets were separated by 6 minutes of rest. Electromyographic (EMG) surface electrodes were placed on the vastus medialis, vastus lateralis, rectus femoris, semitendinosus, biceps femoris, gluteus maximus, gluteus medium, and adductor maior. Analysis of variance and Scheffè post hoc tests indicated a significant difference in EMG activity only for the gluteus maximus; in particular, there was a higher electrical activity of this muscle when back squats were performed at the maximum stance widths at 0 and 70% 1RM. There were no significant differences concerning the EMG activity of the other analyzed muscles. These findings suggest that a large width is necessary for a greater activation of the gluteus maximus during back squats. |
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Authors:
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Antonio Paoli; Giuseppe Marcolin; Nicola Petrone |
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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: 23 ISSN: 1533-4287 ISO Abbreviation: J Strength Cond Res Publication Date: 2009 Jan |
Date Detail:
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Created Date: 2009-01-07 Completed Date: 2009-05-05 Revised Date: - |
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: 246-50 Citation Subset: IM |
Affiliation:
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Department of Human Anatomy and Physiology, Section of Physiology, University of Padova, Padova, Italy. antonio.paoli@unipd.it |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Anthropometry Electromyography* Exercise / physiology Humans Male Muscle Contraction / physiology* Muscle Strength / physiology Muscle Weakness Muscle, Skeletal / physiology* Probability Resistance Training / methods* Thigh Weight Lifting / physiology Weight-Bearing Young Adult |
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