Results 191 to 200 of about 14,293 (220)
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In reply to “On the phase definitions of countermovement jumps”
Scandinavian Journal of Medicine & Science in Sports, 2023Ben Hoffman, Brent Raiteri
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Differences in the utilisation of active power in squat and countermovement jumps
European Journal of Sport Science, 2017AbstractThe aim of this article was to understand how active power is used in squat and countermovement jumps. A simple empirical model comprising a mass, a spring, an active element and a damper, together with an optimisation principle, was used to identify the mechanical factors that maximise performance of jumps without countermovement (squat jumps,
Damián Ferraro, Gabriel Fábrica
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The effects of added mass on the biomechanics and performance of countermovement jumps
Journal of Sports Sciences, 2019This study examined the kinetic and temporal differences between countermovement jumps (CMJs) and eccentrically loaded CMJs. A survey of 109 coaches and athlete showed that 87% of respondents regularly used jumps with added mass within training. Sixteen male and thirteen female track and field athletes from sprinting, hurdling and jumping events ...
Andrew J. Harrison +2 more
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Training Specificity of Hurdle vs. Countermovement Jump Training
Journal of Strength and Conditioning Research, 2011The objective of this study was to compare bilateral and unilateral hurdle jumps with traditional countermovement jumps (CMJs). Thirteen athletes were tested during continuous forward bilateral and unilateral hurdle jumps and single CMJ. Countermovement jump height was used to establish the hurdle height. Subjects jumped forward over 4 hurdles with the
Dario F, Cappa, David G, Behm
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Reliability and Factorial Validity of Squat and Countermovement Jump Tests
The Journal of Strength and Conditioning Research, 2004The primary aim of this study was to determine reliability and factorial validity of squat (SJ) and countermovement jump (CMJ) tests. The secondary aim was to compare 3 popular methods for the estimation of vertical jumping height. Physical education students (n = 93) performed 7 explosive power tests: 5 different vertical jumps (Sargent jump, Abalakow'
Marković, Goran +3 more
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Scandinavian Journal of Medicine & Science in Sports, 1999
Six male subjects, three professional ballet dancers and three elite volleyball players, performed maximal vertical jumps from 1) a static preparatory position (squat jump), 2) starting with a countermovement (counter‐movement jump) and 3) a specific jump for ballet and for volleyball, respectively.
Ravn, Susanne +5 more
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Six male subjects, three professional ballet dancers and three elite volleyball players, performed maximal vertical jumps from 1) a static preparatory position (squat jump), 2) starting with a countermovement (counter‐movement jump) and 3) a specific jump for ballet and for volleyball, respectively.
Ravn, Susanne +5 more
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Vertical jump performance is affected by the velocity and depth of the countermovement
Sports Biomechanics, 2019This study aimed to explore the effect of the velocity and depth of the countermovement on vertical jump performance and the shape of the force-time curve. Seventeen university students performed two blocks of 18 countermovement jumps (CMJ) being instructed to jump for maximum height after performing the countermovement at a self-selected (SS-CMJ) or ...
Alejandro Pérez-Castilla +3 more
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Jump Performance Enhancement Induced by Countermovement
2015The execution of a countermovement prior to the main movement, during which the agonist muscles experience a stretch–shortening cycle (shortening after being lengthened) enhances the exercise performance outcome (countermovement effect). During the stretch–shortening cycle, the fascicles and tendons exhibit a unique behavior; much of the length changes
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