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Athos Trecroci, Stefano Longo, Enrico Perri, F Marcello Iaia, Giampietro Alberti
The aim of the current study was to evaluate field-based physical performance of under 16 years (U16) elite and sub-elite soccer players. Forty elite (n = 20) and sub-elite (n = 20) soccer players were enrolled and tested for countermovement jump (CMJ), 10-m sprint and agility, in terms of sprint with 90° turns (S90), S90 with ball, Slalom, Slalom with ball, and reactive agility (RAT). Statistical and practical significant differences were observed in CMJ, S90 and RAT between elite and sub-elite. Elite players exhibited a likely better performance in Slalom, Slalom with ball and S90 with ball despite a non-significant difference by level of play...
August 3, 2018: Research in Sports Medicine
Rodrigo Ramirez-Campillo, Felipe García-Pinillos, Amador García-Ramos, Javier Yanci, Paulo Gentil, Helmi Chaabene, Urs Granacher
Plyometric jump training (PJT) is a frequently used and effective means to improve amateur and elite soccer players' physical fitness. However, it is unresolved how different PJT frequencies per week with equal overall training volume may affect training-induced adaptations. Therefore, the aim of this study was to compare the effects of an in-season 8 week PJT with one session vs. two sessions per week and equal training volume on components of physical fitness in amateur female soccer players. A single-blind randomized controlled trial was conducted...
2018: Frontiers in Physiology
Tomás T Freitas, Julio Calleja-González, Jorge Carlos-Vivas, Elena Marín-Cascales, Pedro E Alcaraz
This study investigated the effects on neuromuscular performance of a 6-week Optimal Load Training (OLT) and a novel modified Complex Training (MCT) (complex pairs: the same exercise using a moderate and an OL) in basketball players, in-season. Eighteen male athletes were randomly assigned to one of the protocols. Anthropometric measurements were taken to evaluate body composition. Lower- and upper-body maximum dynamic strength, countermovement jump (CMJ), standing long jump (SLJ), 10-m sprint and change of direction (COD) were also assessed...
August 1, 2018: Journal of Sports Sciences
Andrew L Sprague, Angela H Smith, Patrick Knox, Ryan T Pohlig, Karin Grävare Silbernagel
OBJECTIVE: To perform a systematic review and meta-analysis identifying (1) potential modifiable risk factors and (2) associated modifiable factors for patellar tendinopathy in athletes. DESIGN: A systematic review and meta-analysis was conducted. Risk of bias was assessed using the Newcastle-Ottawa Scale and grouped based on study design. Meta-analytic statistics were performed for items reported by five or more studies. A strength of evidence rating is provided for items not appropriate for meta-analysis...
July 27, 2018: British Journal of Sports Medicine
Ewertton de Souza Bezerra, Lucas Bet da Rosa Orssatto, Bruno Monteiro de Moura, Jeffrey M Willardson, Roberto Simão, Antônio Renato Pereira Moro
Berzerra, ES, Orssatto, LBR, Moura, BM, Willardson, JM, Simão, R, and Moro, ARP. Mixed session periodization as a new approach for strength, power, functional performance, and body composition enhancement in aging adults. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to compare the effects of mixed session periodization (MSP) vs. traditional periodization (TP) on strength, power, functional performance, and body composition in aging adults. Forty-five healthy aging adults were randomly divided into 3 groups: MSP, TP, and Control...
July 26, 2018: Journal of Strength and Conditioning Research
Jose M Saavedra, Hafrún Kristjánsdóttir, Ingi Þ Einarsson, Margrét L Guðmundsdóttir, Sveinn Þorgeirsson, Axel Stefansson
Saavedra, JM, Kristjánsdóttir, H, Einarsson, IÞ, Guðmundsdóttir, ML, Þorgeirsson, S, and Stefansson, A. Anthropometric characteristics, physical fitness, and throwing velocity in elite women's handball teams. J Strength Cond Res 32(8): 2294-2301, 2018-The aims of this study were (a) to analyze anthropometric, physical fitness, and throwing speed in women elite handball players of different ages and (b) to develop a multivariate model explaining handball performance from a multidimensional perspective...
August 2018: Journal of Strength and Conditioning Research
Igor de Freitas Cruz, Lucas Adriano Pereira, Ronaldo Kobal, Katia Kitamura, Cristiano Cedra, Irineu Loturco, Cesar Cavinato Cal Abad
The aims of this study were to describe the session rating of perceived exertion (sRPE), total quality recovery (TQR), and variations in countermovement jump (CMJ) height throughout nine weeks of a competitive period in young female basketball players. In total, 10 young female basketball players (17.2 ± 0.4 years; 71.8 ± 15.0 kg; 177.2 ± 9.5 cm) participated in this study. The sRPE and TQR were assessed in each training session, whereas the CMJ height was assessed prior to the first weekly training session...
2018: PeerJ
Jay R Ebert, Peter Edwards, Justine Currie, Anne Smith, Brendan Joss, Timothy Ackland, Jens-Ulrich Buelow, Ben Hewitt
Background: Limb symmetry after anterior cruciate ligament reconstruction may be evaluated using maximal strength and hop tests, which are typically reported using Limb Symmetry Indices (LSIs) which may overestimate function. Purpose: The purpose of this study was to compare the Back in Action (BIA) test battery to standard hop and muscle strength tests used to determine readiness to return to sport (RTS). Study Design: Prospective cohort...
June 2018: International Journal of Sports Physical Therapy
Wei-Han Chen, Wen-Wen Yang, Yi-Hua Lee, Huey-June Wu, Chen-Fu Huang, Chiang Liu
Chen, WH, Yang, WW, Lee, YH, Wu, HJ, Huang, CF, and Liu, C. Acute effects of battle rope exercise on performance, blood lactate levels, perceived exertion, and muscle soreness in collegiate basketball players. J Strength Cond Res XX(X): 000-000, 2018-This study investigated the acute effects of battle rope (BR) exercise on basketball players' performance, blood lactate levels, rating of perceived exertion (RPE), and perceived muscle soreness. Fifteen well-trained Division-I male basketball players underwent the same test procedure at baseline, before BR exercise (30 minutes of rest after the baseline test), and after BR exercise...
July 17, 2018: Journal of Strength and Conditioning Research
Irineu Loturco, Lucas A Pereira, Ronaldo Kobal, Cesar C Cal Abad, Victor Fernandes, Rodrigo Ramirez-Campillo, Timothy Suchomel
This study aimed to examine the associations between a series of mechanical variables automatically generated by a portable force plate (PFP) and the actual performance of professional sprinters over a 150 m course. To test these correlations, 12 top-level sprinters performed vertical jumps (squat and countermovement jumps; SJ and CMJ, respectively), a 60 m sprint test, and a 150 m sprint test. Pearson product-moment coefficient of correlation and multiple regression analyses were used to determine the relationships between the sprinting velocities and vertical jump outputs...
July 12, 2018: Sports
Tracy A Axel, Jill A Crussemeyer, Kevyn Dean, Douglas E Young
Lower body and core muscular strength are essential for optimal performance in many sports and competitive surfers have similar strength demands when maneuvering a surfboard to achieve competition success. Presently, the use of unstable surfaces is excessively utilized by surf coaches and trainers and to date, research does not support this as an effective training method for long-term improvements. Therefore, the purpose of this study was to determine the effectiveness of an 8-week Core Strength Training Program (CSTP) on a battery of field tests specific to assessing core musculature and lower body strength for junior competitive surf athletes...
2018: International Journal of Exercise Science
Braulio Sánchez-Ureña, Daniel Rojas-Valverde, Randall Gutiérrez-Vargas
Cold water immersion (CWI) has become a highly used recovery method in sports sciences, which seeks to minimize fatigue and accelerate recovery processes; however, tensiomyography (TMG) is a new method to analyze the muscle mechanical response as a recovery indicator after CWI protocols, this relative new tool of muscle function assessment, can lead to new information of understand fatigue recovery trough CWI. The objective of the study was to compare the effect of two CWI protocols, on neuromuscular function recovery...
2018: Frontiers in Physiology
Katherine Elizabeth Black, Oliver C Witard, Dane Baker, Philip Healey, Victoria Lewis, Francisco Tavares, Sam Christensen, Tom Pease, Brett Smith
Evidence suggests that omega-3 fatty acid supplementation could reduce muscle soreness and maintain muscle function following eccentric exercise-induced muscle damage. The aim of this applied field study was to investigate the effectiveness of consuming a protein-based supplement containing 1546 mg of omega-3 polyunsaturated fatty acid (PUFA) (551 mg eicosapentaenoic acid (EPA) and 551 mg docosahexaenoic acid (DHA)) twice daily (FO) compared to a protein-based placebo (P) on muscle soreness, countermovement jump (CMJ) performance and psychological well-being in 20 professional Rugby Union players during 5 weeks of pre-season training...
July 9, 2018: European Journal of Sport Science
Jonathon J S Weakley, Kevin Till, Dale B Read, Cedric Leduc, Gregory A B Roe, Padraic J Phibbs, Joshua Darrall-Jones, Ben Jones
Weakley, JJS, Till, K, Read, DB, Leduc, C, Roe, GAB, Phibbs, PJ, Darrall-Jones, J, and Jones, B. Jump training in rugby union players: barbell or hexagonal bar?. J Strength Cond Res XX(X): 000-000, 2018-The countermovement jump (CMJ) is an exercise that can develop athletic performance. Using the conventional barbell (BAR) and hexagonal barbell (HEX) while jumping, the intensity can be increased. However, the bar that provides greater adaptations is unknown. Therefore, this study aimed to assess changes in loaded and unloaded CMJ with either a BAR or HEX across a 4-week mesocycle in rugby union players...
July 4, 2018: Journal of Strength and Conditioning Research
Athos Trecroci, Luca Cavaggioni, Michele Lastella, Marco Broggi, Enrico Perri, F Marcello Iaia, Giampietro Alberti
The aim of this study was to evaluate the effects of 12-week balance and slackline training programs on physical performance and perceived enjoyment scale in young soccer players. Forty-one preadolescent soccer players were assigned to two experimental groups performing traditional balance (BLT) or slackline training (SLT), and a control group. Pre-post assessment encompassed Balance Error Scoring System (BESS), Star Excursion Balance test (SEBT), sprint with 90° turns (S90), and countermovement jump (CMJ)...
July 2, 2018: Research in Sports Medicine
Juan A Párraga-Montilla, Amador García-Ramos, Adrián Castaño-Zambudio, Fernando Capelo-Ramírez, Jorge M González-Hernández, Yaiza Cordero-Rodríguez, Pedro Jiménez-Reyes
Párraga-Montilla, JA, García-Ramos, A, Castaño-Zambudio, A, Capelo-Ramírez, F, González-Hernández, JM, Cordero-Rodríguez, Y, and Jiménez-Reyes, P. Acute and delayed effects of a resistance training session leading to muscular failure on mechanical, metabolic, and perceptual responses. J Strength Cond Res XX(X): 000-000, 2018-This study explored the acute and delayed (24 and 48 hours after exercise) effects of a resistance training session leading to muscular failure. Eleven resistance-trained men completed a training session consisting on 3 sets of repetitions to failure during the back-squat exercise performed at the maximum possible speed with a load equivalent to a mean propulsive velocity (MPV) of 1 m·s (≈60% of 1 repetition maximum)...
June 26, 2018: Journal of Strength and Conditioning Research
Francisco Tavares, Martyn Beaven, Júlia Teles, Dane Baker, Phil Healey, Tiaki B Smith, Matthew Driller
PURPOSE: While the acute effects of cold water immersion (CWI) have been widely investigated, research analysing the effects of CWI over a chronic period in highly-trained athletes is scarce. The aim of this study was to investigate the effects of CWI during an intense three week pre-season phase in elite rugby athletes. METHODS: Twenty-three elite male rugby union athletes were randomized to either CWI (10 min at 10 ºC, n = 10) or a passive recovery control (CON, n = 12) during three-weeks of high volume training...
June 28, 2018: International Journal of Sports Physiology and Performance
Darren J Paul, Joao B Marques, George P Nassis
BACKGROUND: It is unknown whether a concentrated period of small-sided games and high intensity training is an effective training approach in youth soccer players. The aim of the study was to examine the effect of a concentrated period of soccer specific training on physical fitness in youth players. METHODS: Nineteen male soccer players, from two teams, participated (mean ± SD age: 16.2 ± 0.8 years; body mass: 58.2 ± 7.6 kg; height: 170.8 ± 7.7 cm). One team performed 5 days of small-sided games and high intensity training (SSG & HIT; n = 12) and the other team regular soccer training with 1 day of SSG and HIT (REG; n = 7) weekly for 4 weeks...
June 27, 2018: Journal of Sports Medicine and Physical Fitness
Moona M Myllyaho, Johanna K Ihalainen, Anthony C Hackney, Maarit Valtonen, Ari Nummela, Elina Vaara, Keijo Häkkinen, Heikki Kyröläinen, Ritva S Taipale
Myllyaho, MM, Ihalainen, JK, Hackney, AC, Valtonen, M, Nummela, A, Vaara, E, Häkkinen, K, Kyröläinen, H, and Taipale, RS. Hormonal contraceptive use does not affect strength, endurance, or body composition adaptations to combined strength and endurance training in women. J Strength Cond Res XX(X): 000-000, 2018-This study examined the effects of a 10-week period of high-intensity combined strength and endurance training on strength, endurance, body composition, and serum hormone concentrations in physically active women using hormonal contraceptives (HCs, n = 9) compared with those who had never used hormonal contraceptives (NHCs, n = 9)...
June 20, 2018: Journal of Strength and Conditioning Research
Andrew David Govus, Erik Petrus Andersson, Oliver Michael Shannon, Holly Provis, Mathilda Karlsson, Kerry McGawley
This study investigated whether commercially available compression garments (COMP) exerting a moderate level of pressure and/or neuromuscular electrical stimulation (NMES) accelerate recovery following a cross-country sprint skiing competition compared with a control group (CON) consisting of active recovery only. Twenty-one senior (12 males, 9 females) and 11 junior (6 males, 5 females) Swedish national team skiers performed an outdoor sprint skiing competition involving four sprints lasting ∼3-4 min. Before the competition, skiers were matched by sex and skiing level (senior versus junior) and randomly assigned to COMP (n = 11), NMES (n = 11) or CON (n = 10)...
June 20, 2018: European Journal of Sport Science
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