| Electromyographical Analysis of Lower Extremity Muscle Activation During Variations of the Loaded Step Up Exercise. | |
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MedLine Citation:
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PMID: 22237139 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The loaded step up exercise allows strength and conditioning practitioners to incorporate a unilateral resistance for athletes while performing extension at the hip, knee, and plantar flexion at the ankle. This study evaluated the activation of the biceps femoris, gluteus maximus, gluteus medius, rectus femoris, semitendinosus, vastus lateralis, and vastus medialis during four variations of the step up exercise in order to assess the specific muscle training stimulus of each exercise variation. The exercises included the step up, crossover step up, diagonal step up, and lateral step up. Fifteen women who regularly engaged in lower body resistance training performed the four exercises with 6RM loads on a 45.72cm (18 inch) plyometric box. Data were collected with a telemetered EMG system, and RMS values were calculated for EMG data for eccentric and concentric phases. Results of a repeated measures ANOVA revealed a variety of differences in muscle activation between the exercises (P≤0.05). Results indicated that the crossover step up elicited the greatest concentric muscle activation for the gluteus medius, while the step up elicited greatest eccentric activation for the gluteus medius, and greatest activation for the gluteus maximus, biceps femoris and semitendinosus in both concentric and eccentric phases. These findings can be used by practitioners to inform exercise selection to best target and maximally activate a variety of hip and thigh musculature. |
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Authors:
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Christopher J Simenz; Luke R Garceau; Brittney N Lutsch; Timothy J Suchomel; William P Ebben |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-10 |
Journal Detail:
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Title: Journal of strength and conditioning research / National Strength & Conditioning Association Volume: - ISSN: 1533-4287 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9415084 Medline TA: J Strength Cond Res Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Clinical Associate Professor, Marquette University Strength & Conditioning Laboratory, Department of Physical Therapy/Program in Exercise Science, Marquette University, P.O. Box 1881 Milwaukee, WI 53201-1881. 414-288-6175 christopher.simenz@mu.edu; Teaching Laboratory Assistant, Department of Physical Therapy/Program in Exercise Science, Marquette University; Department of Health, Exercise Science and Sport Management, University of Wisconsin-Parkside. |
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