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Olfa Turki, Wissem Dhahbi, Johnny Padulo, Riadh Khalifa, Sana Ridène, Khaled Alamri, Mirjana Milić, Sabri Gueid and Karim Chamari

(blocking) and offensive (attacking, passing, and serving) maneuvers. 14 , 15 Consequently, vertical jump performance was found to be a good performance predictor in volleyball. 16 However, a number of other physiological factors such as CODs have been associated with achievement in volleyball. 16 Indeed

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Dustin J. Oranchuk, Eric J. Drinkwater, Riki S. Lindsay, Eric R. Helms, Eric T. Harbour and Adam G. Storey

the effects of 15 weeks for weightlifting and powerlifting training and found that weightlifting leads to greater improvements in the 40-yard dash and vertical jump. In addition, Although recent studies have found that jump training leads to similar or greater vertical jump improvements, 9 , 10

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Kieran Cooke, Tom Outram, Raph Brandon, Mark Waldron, Will Vickery, James Keenan and Jamie Tallent

provide indirect measurements of an athlete’s functional state, it is preferable to accompany these monitoring strategies with direct assessments of neuromuscular function. For example, vertical jump testing, 20-m sprint tests, and peak power assessment using a cycle ergometer are popular isoinertial

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Yiannis Michailidis, Alexandros Tabouris and Thomas Metaxas

instead of the vertical jump (VJ) test. 24 The greater distance covered was recorded to the nearest 0.5 cm with a tape. The coefficient of variation for test–retest trials was 3.1%. VJ Testing The participants performed 2 jump tests: (a) SJ: participants, from a stationary semisquatted position (90

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Aaron T. Scanlan, Neal Wen, Joshua H. Guy, Nathan Elsworthy, Michele Lastella, David B. Pyne, Daniele Conte and Vincent J. Dalbo

and dynamic strength ( r  = .71 to .89), 4 , 7 vertical jump ( r  = .19 to .81), 4 , 7 linear sprint ( r  = −.69 to .73), 4 and change-of-direction speed ( r  = −0.52 to −0.85) 4 , 7 measures in adult basketball players. Relationships between impulse during the IMTP and power-related attributes

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Paula B. Debien, Marcelly Mancini, Danilo R. Coimbra, Daniel G.S. de Freitas, Renato Miranda and Maurício G. Bara Filho

to technical movement actions, the vertical jump is considered a very important element during volleyball training sessions and matches, as it is used in the basic actions for setting, serving, blocking, and attacking. 3 In this way, good training periodization is essential to ensure that, during

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Thomas Haugen, Gøran Paulsen, Stephen Seiler and Øyvind Sandbakk

example, the peak power measured in unilateral movements (running and cycling) is about half of bilateral movements such as a vertical jump. 38 , 40 , 41 Finally, the time–power curve is hyperbolic. 36 , 37 The steep left part of the curve shows that peak power drops substantially with only small

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Christie Tangalos, Samuel J. Robertson, Michael Spittle and Paul B. Gastin


Player match statistics in junior Australian football (AF) are not well documented, and contributors to success are poorly understood. A clearer understanding of the relationships between fitness and skill in younger players participating at the foundation level of the performance pathway in AF has implications for the development of coaching priorities (eg, physical or technical).


To investigate the relationships between indices of fitness (speed, power, and endurance) and skill (coach rating) on player performance (disposals and effective disposals) in junior AF.


Junior male AF players (N = 156, 10–15 y old) were recruited from 12 teams of a single amateur recreational AF club located in metropolitan Victoria. All players were tested for fitness (20-m sprint, vertical jump, 20-m shuttle run) and rated by their coach on a 6-point Likert scale for skill (within a team in comparison with their teammates). Player performance was assessed during a single match in which disposals and their effectiveness were coded from a video recording.


Coach rating of skill displayed the strongest correlations and, combined with 20-m shuttle test, showed a good ability to predict the number of both disposals and effective disposals. None of the skill or fitness attributes adequately explained the percentage of effective disposals. The influence of team did not meaningfully contribute to the performance of any of the models.


Skill development should be considered a high priority by coaches in junior AF.

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Mehrez Hammami, Nawel Gaamouri, Gaith Aloui, Roy J. Shephard and Mohamed Souhaiel Chelly

30 m by 5 paired single beam photocells (Microgate, Bolzano, Italy). Three trials were separated by 6 to 8 minutes of recovery, with the best result for 30-m distance and the corresponding 5, 10, and 20 m being recorded as experimental trials. Vertical Jump After a 15-minute warm-up, flight times

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Martina A. Maggioni, Matteo Bonato, Alexander Stahn, Antonio La Torre, Luca Agnello, Gianluca Vernillo, Carlo Castagna and Giampiero Merati

2 max (% V ˙ O 2 max ). Blood lactate concentration (BLC) (Lactate Pro LT-1710; Arkray Factory Inc, Shiga, Japan) was obtained by small earlobe sampling 2 minutes after exhaustion. Vertical-Jump Assessment Series of 3 SJs and 3 CMJs were performed on a force platform (model Quattro Jump; Kistler