Abstract：
:Talpey, SW, Young, WB, and Beseler, B. Effect of instructions on selected jump squat variables. J Strength Cond Res 30(9): 2508-2513, 2016-The purpose of this study was to compare 2 instructions on the performance of selected variables in a jump squat (JS) exercise. The second purpose was to determine the relationships between JS variables and sprint performance. Eighteen male subjects with resistance training experience performed 2 sets of 4 JS with no extra load with the instructions to concentrate on (a) jumping for maximum height and (b) extending the legs as fast as possible to maximize explosive force. Sprint performance was assessed at 0- to 10-m and 10- to 20-m distances. From the JS jump height, peak power, relative peak power, peak force, peak velocity, and countermovement distance were measured from a force platform and position transducer system. The JS variables under the 2 instructions were compared with paired t-tests, and the relationships between these variables and sprint performance were determined with Pearson's correlations. The jump height instruction produced greater mean jump height and peak velocity (p < 0.05), but the fast leg extension instruction produced greater (p < 0.05) peak force (3.7%). There was a trivial difference between the instructions for peak power output (p > 0.05). Jump height was the variable that correlated most strongly with 10-m time and 10- to 20-m time under both instructions. The height instruction produced a stronger correlation with 10-m time (r = -0.455), but the fast leg extension JS produced a greater correlation with 10-20 time (r = -0.545). The results indicate that instructions have a meaningful influence on JS variables and therefore need to be taken into consideration when assessing or training athletes.
journal_name
J Strength Cond Resjournal_title
Journal of strength and conditioning researchauthors
Talpey SW,Young WB,Beseler Bdoi
10.1519/JSC.0000000000000435subject
Has Abstractpub_date
2016-09-01 00:00:00pages
2508-13issue
9eissn
1064-8011issn
1533-4287journal_volume
30pub_type
杂志文章abstract：:Young, WB and Murray, MP. Reliability of a field test of defending and attacking agility in Australian football and relationships to reactive strength. J Strength Cond Res 31(2): 509-516, 2017-Defending and attacking agility tests for Australian football do not exist, and it is unknown whether any physical qualities c...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
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更新日期：2017-02-01 00:00:00
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journal_title：Journal of strength and conditioning research
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journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
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abstract：:Longitudinal information requires the notion of repeated measurements throughout time. Such data is important because it allows the determination of the effectiveness of an intervention program. Research in competitive swimming has given special emphasis to energetics and biomechanics as determinant domains to improve...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章,评审
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更新日期：2012-07-01 00:00:00
abstract：:Circulating creatine kinase (CK) levels are often monitored as an indirect biomarker of muscle damage after resistive exercise. The purpose of the present investigation was to evaluate whether capillary whole-blood sampling, a simpler and less invasive method for obtaining a venous blood sample, would allow for a reli...
journal_title：Journal of strength and conditioning research
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更新日期：2010-12-01 00:00:00
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journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
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更新日期：2011-07-01 00:00:00
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更新日期：2012-01-01 00:00:00
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journal_title：Journal of strength and conditioning research
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更新日期：2018-11-01 00:00:00
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journal_title：Journal of strength and conditioning research
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journal_title：Journal of strength and conditioning research
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：2001-11-01 00:00:00
