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Thomas M. Stephens II, Brooke R. Lawson, Dale E. DeVoe and Raoul F. Reiser II

Expectations may be for both legs to function identically during single- and double-leg vertical jumps. However, several reasons might prevent this from occurring. The goals of this investigation were twofold: assess the presence of side-to-side jump height differences during single-leg jumps in a homogenous group of healthy subjects and determine if those with a jump height asymmetry possessed consistent biomechanical differences during single- and double-leg jumps. Thirteen men and 12 women with competitive volleyball experience volunteered for the study. Significance was assessed at p < 0.05. The men jumped significantly higher than the women in all conditions and possessed differences in several anthropometric, kinematic, and kinetic parameters. Based on a three-jump average, all subjects had one leg that they could jump higher with (the dominant leg, DL). The men generated significantly greater maximum ground reaction forces and ankle joint powers on their DL whereas the women had no differences during the single-leg jumps. The only side-to-side differences that existed during the double-leg jumps were in the average ground reaction forces during propulsion. These findings suggest that equality of single-leg jump performance is the exception rather than the norm, with identification of consistent biomechanical attributes difficult within a group. Furthermore, any differences are not likely to cross over to other tasks, with men and women utilizing slightly different jump techniques.

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Christina Duff, Johann Issartel, Wesley O’ Brien and Sarahjane Belton

-week period. Fundamental Movement Skills Four FMS were assessed consisting of two locomotor skills (run and vertical jump) and two object control skills (catch and overhand throw). Skills were assessed using the guidelines from the Test of Gross Motor Development-2 ( Ulrich, 2000 ) for run, catch, and

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Bethany L. Anderson, Rod A. Harter and James L. Farnsworth II

vertical jump height (in centimeters) and range of motion, measured by either sit-and-reach or goniometry. • A total of 7 studies were identified. Three studies were eliminated because they did not measure the desired outcomes for this critically appraised topic. The search identified 4 studies that met

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Alberto Franceschi, Daniele Conte, Marco Airale and Jaime Sampaio

increasing trend in vertical jump performances across the competitive phase, together with a diminished perceptual fatigue. As the competition phase approached, the training load decreased in terms of training time, sprint, and jump volume. A reduction in workload during the most important phases (ie

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James Scales, Jamie M. O’Driscoll, Damian Coleman, Dimitrios Giannoglou, Ioannis Gkougkoulis, Ilias Ntontis, Chrisoula Zisopoulou and Mathew Brown

measuring the change in power or the force-generating capacity of a muscle group. A commonly used field-based method of assessing muscle function is via a vertical jump test (VJT) due to the minimal equipment required. Indeed, a reduction in lower limb power has been observed in Royal Marine recruits

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Morgan Potter, John C. Spence, Normand Boulé, Jodie A. Stearns and Valerie Carson

(step test), musculoskeletal fitness (grip strength, push-ups, partial curls-ups, and vertical jump), and flexibility (sit and reach test). All participants were cleared for fitness testing by the Physical Activity Readiness Questionnaire ( 6 ). Before beginning the fitness testing, participants

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Michelle S. Rockwell, Madlyn I. Frisard, Janet W. Rankin, Jennifer S. Zabinsky, Ryan P. Mcmillan, Wen You, Kevin P. Davy and Matthew W. Hulver

Collegiate Strength and Conditioning Coaches Association. The participants completed a maximal-effort one-repetition parallel back squat, standing broad jump and standing vertical jump, and pull-ups and dips to failure. The testing protocols described in detail by the National Strength and Conditioning

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Carlos Marta, Ana R. Alves, Pedro T. Esteves, Natalina Casanova, Daniel Marinho, Henrique P. Neiva, Roberto Aguado-Jimenez, Alicia M. Alonso-Martínez, Mikel Izquierdo and Mário C. Marques

, control; CM jump, countermovement vertical jump; RT, resistance training; SL jump, standing long jump; ST, suspension training. Experimental Design and Training Program From an initial sample of 74 boys who met the necessary requirements to participate, finally 57 were randomly assigned into 1 of 3 groups

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Jade A.Z. Haycraft, Stephanie Kovalchik, David B. Pyne and Sam Robertson

pathway players: 5-, 10-, and 20-m sprint; AFL agility; vertical jump (VJ); running VJ (right and left leg); and the 20-m multistage fitness test (MSFT). 1 , 18 As a result, physical fitness tests have proven to be useful for tracking career progression, recruiting trends, and players’ selection for

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Mário A.M. Simim, Gustavo R. da Mota, Moacir Marocolo, Bruno V.C. da Silva, Marco Túlio de Mello and Paul S. Bradley

 al., 2017 ). Subsequently, these values were divided by body mass to include a relative measure. All players performed three countermovement jump with 30-s recovery between each jump. The players were instructed to use a preliminary movement by rapidly flexing the knee, before launching the body vertically