| Acute effects of heavy-load squats on consecutive squat jump performance. | |
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MedLine Citation:
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PMID: 18438248 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Postactivation potentiation (PAP) and complex training have generated interest within the strength and conditioning community in recent years, but much of the research to date has produced confounding results. The purpose of this study was to observe the acute effects of a heavy-load back squat [85% 1 repetition maximum (1RM)] condition on consecutive squat jump performance. Twelve in-season Division I male track-and-field athletes participated in two randomized testing conditions: a five-repetition back squat at 85% 1RM (BS) and a five-repetition squat jump (SJ). The BS condition consisted of seven consecutive squat jumps (BS-PRE), followed by five repetitions of the BS at 85% 1RM, followed by another set of seven consecutive squat jumps (BS-POST). The SJ condition was exactly the same as the BS condition except that five consecutive SJs replaced the five BSs, with 3 minutes' rest between each set. BS-PRE, BS-POST, SJ-PRE, and SJ-POST were analyzed and compared for mean and peak jump height, as well as mean and peak ground reaction force (GRF). The BS condition's mean and peak jump height and peak GRF increased 5.8% +/- 4.8%, 4.7% +/- 4.8%, and 4.6% +/- 7.4%, respectively, whereas the SJ condition's mean and peak jump height and peak GRF decreased 2.7% +/- 5.0%, 4.0% +/- 4.9%, and 1.3% +/- 7.5%, respectively. The results indicate that performing a heavy-load back squat before a set of consecutive SJs may enhance acute performance in average and peak jump height, as well as peak GRF. |
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Authors:
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Kurt R Weber; Lee E Brown; Jared W Coburn; Steven M Zinder |
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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: 22 ISSN: 1533-4287 ISO Abbreviation: J Strength Cond Res Publication Date: 2008 May |
Date Detail:
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Created Date: 2008-06-06 Completed Date: 2008-08-07 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: 726-30 Citation Subset: IM |
Affiliation:
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Human Performance Laboratory, California State University, Fullerton, California, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Cohort Studies Humans Male Muscle Contraction / physiology Muscle Strength / physiology* Physical Education and Training / methods* Physical Endurance / physiology* Posture Probability Sensitivity and Specificity Task Performance and Analysis Track and Field / physiology* Weight-Bearing / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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