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Glu298, AMPD1 C, UCP2 Ala55, BDKRB2 −9 and impulse force of arms free vertical jump in 77 elite Czech football players. We did not find statistically significant association (P > 0.05) in impulse force between carriers of power/strength alleles and non-carriers allels. Our results did not

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Eric S. Rawson, Mary P. Miles and D. Enette Larson-Meyer

supplementation on muscle function have been described as equivocal, with discrepancies in research in part caused by differences in baseline 25-hydroxyvitamin D concentrations prior to supplementation ( Close et al., 2016 ). For example, Close, Russell, et al. ( 2013 ) showed improved sprint time and vertical

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Kevin L. de Keijzer, Stuart A. McErlain-Naylor, Antonio Dello Iacono and Marco Beato

exercise in terms of the kinematic and kinetic variables associated with the movements and the muscle actions involved. 8 , 9 Among other methodologies, eccentric overload (EOL) exercise has consistently proven to be effective for acutely improving horizontal and vertical jumping performance. 5 , 10 , 11

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Daniel Boullosa, Marco Beato, Antonio Dello Iacono, Francisco Cuenca-Fernández, Kenji Doma, Moritz Schumann, Alessandro Moura Zagatto, Irineu Loturco and David G. Behm

.1002/mus.24533 25504211 10.1002/mus.24533 22. Dello Iacono A , Beato M , Halperin I . The effects of cluster-set and traditional-set postactivation potentiation protocols on vertical jump performance . Int J Sports Physiol Perform . 2020 ; 15 ( 4 ): 464 – 469 . PubMed ID: 31614331 doi:10

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Philip X. Fuchs, Andrea Fusco, Jeffrey W. Bell, Serge P. von Duvillard, Cristina Cortis and Herbert Wagner

-18%20High%20School%20Athletics%20Participation%20Survey.pdf . Accessed June 20, 2019. 2. Ziv G , Lidor R . Vertical jump in female and male volleyball players: a review of observational and experimental studies . Scand J Med Sci Sports . 2010 ; 20 ( 4 ): 556 – 567 . doi:10.1111/j.1600

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Malachy P. McHugh, Tom Clifford, Will Abbott, Susan Y. Kwiecien, Ian J. Kremenic, Joseph J. DeVita and Glyn Howatson

-Sensor 2; BTS Bioengineering, Brooklyn, NY). As described previously, participants started the movement standing upright with hands on their hips, and after a verbal cue, descended into a squat (countermovement) prior to performing a maximal effort vertical jump. Participants performed 3 maximal efforts

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Fernando Pareja-Blanco, Eduardo Sáez de Villarreal, Beatriz Bachero-Mena, Ricardo Mora-Custodio, José Antonio Asián-Clemente, Irineu Loturco and David Rodríguez-Rosell

, 30-m sprint time. Resisted Running Sprints and Vertical Jump Tests Regarding resisted sprint time, G0% showed significant reductions in T10 ( P  = .010) and T20 ( P  = .014) with sled load of 20% BM (Figure  1 ). The G40% group attained significant decreases with 20% (T10: P  = .019, T20: P  = .008

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Amin Daneshfar, Carl J. Petersen, Majid S. Koozehchian and Daniel E. Gahreman

). Acute improvement in vertical jump height following a single caffeine ingestion has reported roughly equivalent to 4 weeks of plyometric training ( Grgic et al., 2018 ; Markovic, 2007 ); however, other studies have reported no improvements in anaerobic performance following caffeine consumption

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Daniel Boullosa, César C.C. Abad, Valter P. Reis, Victor Fernandes, Claudio Castilho, Luis Candido, Alessandro M. Zagatto, Lucas A. Pereira and Irineu Loturco

; RSI, reactive strength index. Procedures Vertical-Jump Assessments The DJ and countermovement jump (CMJ) assessments were performed following previous standard protocols 9 on a contact platform (Elite Jump; S2 Sports, São Paulo, Brazil). Warm-Up Protocols The standard warm-up protocol consisted of 10

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Matthew A. Wyon, Roger Wolman, Nicolas Kolokythas, Karen Sheriff, Shaun Galloway and Adam Mattiussi

.2165/00007256-200434100-00003 15335242 16. Thomas C , Comfort P , Jones PA , Dos’ Santos T . A Comparison of isometric midthigh-pull strength, vertical jump, sprint speed, and change-of-direction speed in academy netball players . Int J Sports Physiol Perform . 2016 ; 12 ( 7 ): 916 – 921 . PubMed ID: 27918677 doi:10