Abstract：
:The purpose of this study was to compare the kinetics, kinematics, and muscle activation patterns of the countermovement jump, the power clean, and the jump squat with the expectation of gaining a better understanding of the mechanism of transfer from the power clean to the vertical jump. Ground reaction forces, electromyography, and joint angle data were collected from 20 trained participants while they performed the three movements. Relative to the power clean, the kinematics of the jump squat were more similar to those of the countermovement jump. The order in which the ankle, knee, and hip began extending, as well as the subsequent pattern of extension, was different between the power clean and countermovement jump. The electromyography data demonstrated significant differences in the relative timing of peak activations in all muscles, the maximum activation of the rectus femoris and biceps femoris, and in the activation/deactivation patterns of the vastus medialis and rectus femoris. The greatest rate of force development during the upward phase of these exercises was generated during the power clean (17,254 [Formula: see text]), which was significantly greater than both the countermovement jump (3836 [Formula: see text]) and jump squat (3517 [Formula: see text]) conditions (P < .001, [Formula: see text]).
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
MacKenzie SJ,Lavers RJ,Wallace BBdoi
10.1080/02640414.2014.908320subject
Has Abstractpub_date
2014-01-01 00:00:00pages
1576-85issue
16eissn
0264-0414issn
1466-447Xjournal_volume
32pub_type
杂志文章abstract：:In this study, we examined the influence of internal and external attention instructions on the performance of a pitch shot by golfers who were either highly skilled (mean handicap = 4) or low skilled (mean handicap = 26). Ten golfers in each skill group used a 9-iron to pitch a ball as close as possible to an orange ...
journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
pub_type： 杂志文章,随机对照试验
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
pub_type： 杂志文章
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journal_title：Journal of sports sciences
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更新日期：2015-01-01 00:00:00
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pub_type： 杂志文章,随机对照试验
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journal_title：Journal of sports sciences
pub_type： 杂志文章,随机对照试验
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journal_title：Journal of sports sciences
pub_type： 杂志文章,随机对照试验
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journal_title：Journal of sports sciences
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更新日期：2018-11-01 00:00:00
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journal_title：Journal of sports sciences
pub_type： 杂志文章
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更新日期：2017-08-01 00:00:00
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
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更新日期：2007-06-01 00:00:00
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