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David Rodríguez-Rosell, Felipe Franco-Márquez, Fernando Pareja-Blanco, Ricardo Mora-Custodio, Juan M. Yáñez-García, José M. González-Suárez and Juan J. González-Badillo


To analyze the effects of low-load, high-velocity resistance training (RT) combined with plyometrics on physical performance in pre-peak-height-velocity (PHV) soccer players.


Thirty young soccer players from the same academy were randomly assigned to either a strength training (STG, n = 15) or a control group (CG, n = 15). Strength training consisted of full squat exercise with low load (45–58% 1RM) and low volume (4–8 repetitions/set) combined with jumps and sprints twice a week over 6 wk of preseason. The effect of the training protocol was assessed using sprint performance over 10 and 20 m, countermovement jump, estimated 1-repetition maximum, and average velocity attained against all loads common to pre- and posttests in full squat.


STG showed significant improvements (P = .004–.001) and moderate to very large standardized effects (ES = 0.71–2.10) in all variables measured, whereas no significant gains were found in CG (ES = –0.29 to 0.06). Moreover, significant test × group interactions (P < .003–.001) and greater between-groups ESs (0.90–1.97) were found for all variables in favor of STG compared with CG.


Only 6 wk of preseason low-volume and low-load RT combined with plyometrics can lead to relevant improvements in strength, jump, and sprint performance. Thus, the combination of field soccer training and lightweight strength training could be used for a greater development of the tasks critical to soccer performance in pre-PHV soccer players.

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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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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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Jason P. Brandenburg and Luisa V. Giles

a randomized, double-blind, placebo (PLA)-controlled crossover design. Participants visited the laboratory on four occasions. The first visit was to familiarize participants with the 8-km treadmill TT, countermovement vertical jump (CMVJ), and drop jump (DJ). Participants practiced both jump types

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Lucas A. Pereira, Rodrigo Ramirez-Campillo, Saul Martín-Rodríguez, Ronaldo Kobal, César C.C. Abad, Ademir F.S. Arruda, Aristide Guerriero and Irineu Loturco

fatigue, the acute responses of elite athletes to specific workouts (ie, technical, tactical, or physical training sessions) seem to be one of the most frequently examined topics. For example, Weakley et al 3 reported distinct vertical jump, perceptual, metabolic, and hormonal responses to traditional

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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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Mark Booth, Stephen Cobley and Rhonda Orr

performance,” OR “strength,” OR “1RM” OR “3RM,” OR “5RM,” OR “bench throw” OR “jump squat,” OR “vertical jump” OR “CMJ,” OR “jump height,” OR “sprint,” OR “running velocity,” OR “acceleration,” OR “maximal speed,” OR “change of direction,” OR “COD,” OR “agility” OR “505,” OR “injury,” OR “strain,” OR “sprain

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Jorge Carlos-Vivas, Jorge Perez-Gomez, Ola Eriksrud, Tomás T. Freitas, Elena Marín-Cascales and Pedro E. Alcaraz

after 8 weeks of linear and COD sprint training. The authors hypothesized that (1) all RST groups will experience improvements in sprint and COD performance, and they will also likely obtain enhancements in horizontal and vertical jump performance, and (2) the groups that performed RST with horizontally

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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

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Michele Merlini, Greg Whyte, Sam Marcora, Mike Loosemore, Neil Chester and John Dickinson

, peak concentric strength of the knee extensors and flexors, maximal 1 repetition of bench and leg press, vertical jump, and skinfold thickness. Participants were randomly allocated to 1 of 3 treatments to be inhaled twice daily: placebo (PLA) inhaler, 100-µg inhaled SAL, or 12-µg inhaled FOR. Over the