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Joel M. Garrett, Stuart R. Graham, Roger G. Eston, Darren J. Burgess, Lachlan J. Garrett, John Jakeman and Kevin Norton

. Rodano R , Squadrone R . Stability of selected lower limb joint kinetic parameters during vertical jump . J Appl Biomech . 2002 ; 18 : 83 – 89 . doi:10.1123/jab.18.1.83 10.1123/jab.18.1.83 23. Atkinson G , Nevill AM . Statistical methods for assessing measurement error (reliability) in

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Patrick Ward, Aaron J. Coutts, Ricard Pruna and Alan McCall

this approach may be useful when analyzing performance testing data for groups of athletes (eg, vertical jump for athletes in each position group of an American Football team), the magnitude of between-subject SD falls victim to the heterogeneity of the group 15 limiting its utility to detect changes

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Anthony N. Turner, Geoff Marshall, Angelo Noto, Shyam Chavda, Nathan Atlay and David Kirby

considered a better indicator of lunging performance than vertical jumping ability 6 ; it is thus more pertinent to fencing. The SBJ was measured using a flexible tape measure, placed along the ground. Fencers had to jump as far forward as possible, keeping their hands on their hips. If the fencers fell

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Johan Cassirame, Hervé Sanchez and Jean-Benoit Morin

JF , Gouge S , Nussbaumer S , Stauffacher S , Impellizzeri FM , Maffiuletti NA . Validity and reliability of Optojump photoelectric cells for estimating vertical jump height . J Strength Cond Res . 2011 ; 25 ( 2 ): 556 – 560 . doi:10.1519/JSC.0b013e3181ccb18d 20647944 10.1519/JSC.0b

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Jason D. Vescovi and Greig Watson

, F.A. , Kenefick , R.W. , Ely , B.R. , Cheuvront , S.N. , & Goulet , E.D. ( 2015 ). Effect of hypohydration on muscle endurance, strength, anaerobic power and capacity and vertical jumping ability: A meta-analysis . Sports Medicine, 45 ( 8 ), 1207 – 1227 . PubMed ID: 26178327.doi:10

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Mayur K. Ranchordas, George King, Mitchell Russell, Anthony Lynn and Mark Russell

), 683 – 690 . PubMed ID: 23135367 doi:10.1249/MSS.0b013e3182797637 10.1249/MSS.0b013e3182797637 Bloms , L.P. , Fitzgerald , J.S. , Short , M.W. , & Whitehead , J.R. ( 2016 ). The effects of caffeine on vertical jump height and execution in collegiate athletes . The Journal of Strength and

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Kelly Pritchett, Robert C. Pritchett, Lauren Stark, Elizabeth Broad and Melissa LaCroix

trials have reported improved performance measures (isometric strength, vertical jump, and 10-m sprint time) following supplementation dosages of 2,000–5,000 IU/day of vitamin D 3 over 8 weeks to 4 months during the winter season ( Close et al., 2013 ; Wyon et al., 2014 ). Similarly, Ward et al. ( 2009

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Nick Dobbin, Richard Hunwicks, Ben Jones, Kevin Till, Jamie Highton and Craig Twist

. PubMed doi:10.1519/JSC.0000000000001830 10.1519/JSC.0000000000001830 22. Thomas C , Jones PA , Rothwell J , Chiang CY , Comfort P . An investigation into the relationship between maximum isometric strength and vertical jump performance . J Strength Cond Res . 2015 ; 29 ( 8 ): 2176 – 2185

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Alexander T. Latinjak, Marc Masó and Nikos Comoutos

instructional self talk on improving motor performance . The Sport Psychologist, 14 , 253 – 271 . doi:10.1123/tsp.14.3.253 10.1123/tsp.14.3.253 Tod , D.A. , Thatcher , R. , McGuigan , M. , & Thatcher , J. ( 2009 ). Effects of instructional and motivational self-talk on the vertical jump . The

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Tom Clifford, Will Abbott, Susan Y. Kwiecien, Glyn Howatson and Malachy P. McHugh

system (Bolzano, Italy). Participants started the movement upright with hands fixed to their hips and after a verbal cue, descended into a squat prior to performing a maximal effort vertical jump. Participants performed 3 maximal efforts, separated by approximately 60 seconds of standing recovery; the