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Hyun Chul Jung, Myong Won Seo, Sukho Lee, Sung Woo Jung and Jong Kook Song

small sample size ( n  = 5) in that study with inconsistent trends in performance changes (no improvement in 30-m sprint, Illinois agility, and one-repetition maximum bench press and back squat) may limit the study’s ability to determine the efficacy of vitamin D supplementation on fitness. This study

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Rafael Sabido, Jose Luis Hernández-Davó and Gabriel T. Pereyra-Gerber

:10.1249/MSS.0b013e318213f880 10.1249/MSS.0b013e318213f880 21311352 30. Hester GM , Conchola EC , Thiele RM , De Freitas JM . Power output during a high-volume power-oriented back squat protocol . J Strength Cond Res . 2014 ; 28 ( 10 ): 2801 – 2805 . PubMed doi:10.1519/JSC

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Ramón Marcote-Pequeño, Amador García-Ramos, Víctor Cuadrado-Peñafiel, Jorge M. González-Hernández, Miguel Ángel Gómez and Pedro Jiménez-Reyes

.1080/02640414.2015.1068439 10.1080/02640414.2015.1068439 26197721 7. Chelly MS , Fathloun M , Cherif N , Ben Amar M , Tabka Z , Van Praagh E . Effects of a back squat training program on leg power, jump, and sprint performances in junior soccer players . J Strength Cond Res . 2009 ; 23 ( 8 ): 2241 – 2249

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Michael J.A. Speranza, Tim J. Gabbett, David A. Greene, Rich D. Johnston, Andrew D. Townshend and Brett O’Farrell

and technique. For the back squats, players were required to perform the movement to a below-parallel-thigh position (ie, they descended to a position where the hip crease passed below the middle of the knee joint), and for the bench press it was essential for the bar to touch the chest before the

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Lee Taylor, Christopher J. Stevens, Heidi R. Thornton, Nick Poulos and Bryna C.R. Chrismas

back-squat position. Athletes were instructed to limit the dowel movement before, during, and after CMJ execution. After placing one foot on each force platform, athletes stood motionless for 3 seconds to determine body mass. They were then instructed to drop into a squat position and then immediately

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Brian J. McMorrow, Massimiliano Ditroilo and Brendan Egan

, Sanudo B , et al . Comparative effects of in-season full-back squat, resisted sprint training, and plyometric training on explosive performance in U-19 elite soccer players. J Strength Cond Res . 2016 ; 30 : 368 – 377 . doi:10.1519/jsc.0000000000001094 10.1519/JSC.0000000000001094 26. Gil S

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Michal Wilk, Michal Krzysztofik, Milosz Drozd and Adam Zajac

application of postactivation potentiation to elite sport . Int J Sports Physiol Perform . 2007 ; 2 ( 4 ): 439 – 444 . PubMed ID: 19171961 doi:10.1123/ijspp.2.4.439 19171961 10.1123/ijspp.2.4.439 9. Esformes JI , Bampouras TM . Effect of back squat depth on lower-body postactivation potentiation . J

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Jake Schuster, Dan Howells, Julien Robineau, Anthony Couderc, Alex Natera, Nick Lumley, Tim J. Gabbett and Nick Winkelman

–3 (same intensity as wk 2) 4 Very hard 5 × 2 Table 3 Sample Weekly Exercise Selection for Elite Rugby Sevens Athletes Session 1, lower-body bias Session 2, upper-body bias Session 3, whole-body bias A1 back squat 4 × 5 A1 bench press 4 × 5 A1 barbell step-ups 4 × 5 e/s A2 pull-ups 4 × 5 B1 single-leg hip

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Peter A. van de Hoef, Jur J. Brauers, Maarten van Smeden, Frank J.G. Backx and Michel S. Brink

functional tests, such as half squats, full squats, jump squats, and back squats, is highly dependent on the familiarity of the athlete with the exercises and the quality of performance, and not all studies reported familiarization protocols. 31 , 34 Only one study used the preferred reference standard

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Simon A. Rogers, Peter Hassmén, Alexandra H. Roberts, Alison Alcock, Wendy L. Gilleard and John S. Warmenhoven

back squat: a proposed assessment of functional deficits and technical factors that limit performance . Strength Cond J . 2014 ; 36 ( 6 ): 4 – 27 . PubMed ID: 25506270 doi:10.1519/SSC.0000000000000103 10.1519/SSC.0000000000000103 25506270 26. Onate JA , Dewey T , Kollock RO , Thomas KS