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https://www.readbyqxmd.com/read/29448292/a-trunk-stabilization-exercise-warm-up-may-reduce-ankle-injuries-in-junior-soccer-players
#1
Atsushi Imai, Takeshi Imai, Satoshi Iizuka, Koji Kaneoka
The aim of this study was to investigate the efficacy of a trunk stabilization exercise warm-up program in reducing the incidence of lower extremity injuries among male junior soccer players. Two junior soccer teams participated in this study. The intervention (INT) team performed three trunk stabilization exercises before practice sessions and games, while a control (CON) team performed their usual warm-up without trunk exercises. Both teams engaged in regular soccer training and games, and were followed for the incidence of injury...
February 15, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29431592/in-season-changes-in-ventricular-morphology-and-systolic-function-in-adolescent-female-athletes
#2
Andrew M Watson, Carol Coutinho, Kristin Haraldsdottir, Stacey Brickson, Warren Dunn, Marlowe Eldridge
PURPOSE: To evaluate the influence of physical maturity on the changes in ventricular morphology and function with sport training in female youth athletes. METHODS: Thirty-two female athletes (age 13-18 years) underwent height and weight measurement and 2-D echocardiographic evaluation immediately prior to, and following, a 20-week soccer season. Pre- and post-season left ventricular end-diastolic diameter (LVEDD), end-diastolic volume (LVEDV), ejection fraction (LVEF), stroke volume (LVSV), mass (LVM), and posterior wall thickness (LVPWT), right ventricular end-diastolic diameter (RVEDD), end-diastolic area (RVEDA), and fractional area change (RVFAC), and interventricular septal thickness (IVST) were compared...
February 12, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29431546/the-trainability-of-adolescent-soccer-players-to-brief-periodized-complex-training
#3
Athanasios Chatzinikolaou, Konstantinos Michaloglou, Alexandra Avloniti, Diamanda Leontsini, Chariklia K Deli, Dimitris Vlachopoulos, Luis Gracia-Marco, Sotirios Arsenis, Ioannis Athanailidis, Dimitrios Draganidis, Athanasios Z Jamurtas, Craig A Williams, Ioannis G Fatouros
PURPOSE: Τo investigate the effect of a complex, short-term strength/power training protocol on performance and body composition of elite early-adolescent soccer players. METHODS: Twenty-two players (14-15 years) were randomly assigned to (a) an experimental (EG, n=12, participated in a 5-week training protocol with traditional multi-joint power resistance exercises, Olympic-style lifts, plyometric drills and speed work, four times/week) or (b) a control group (CG, n=10)...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29420390/specific-adaptations-in-performance-and-muscle-architecture-after-weighted-jump-squat-vs-body-mass-squat-jump-training-in-recreational-soccer-players
#4
Giuseppe Coratella, Marco Beato, Chiara Milanese, Stefano Longo, Eloisa Limonta, Susanna Rampichini, Emiliano Cè, Angela Valentina Bisconti, F Schena, F Esposito
The aim of the present study was to compare the effects of weighted jump squat (WJST) vs body mass squat jump training (BMSJT) on quadriceps muscle architecture, lower-limb lean-mass (LM) and muscle strength, performance in change of direction (COD), sprint and jump in recreational soccer-players. Forty-eight healthy soccer-players participated in an off-season randomized controlled-trial. Before and after an eight-week training intervention, vastus lateralis pennation angle, fascicle length, muscle thickness, LM, squat 1-RM, quadriceps and hamstrings isokinetic peak-torque, agility T-test, 10 and 30m sprint and squat-jump (SJ) were measured...
February 6, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29420135/impaired-sleep-mediates-the-negative-effects-of-training-load-on-subjective-well-being-in-female-youth-athletes
#5
Andrew Watson, Stacey Brickson
BACKGROUND: Although increased training load (TL) and impaired sleep are associated with decreases in subjective well-being in adult athletes, these relationships among female youth athletes are unclear. It is unknown whether the effects of sleep and TL on well-being are independent or whether alterations in sleep mediate the effects of TL on subjective well-being. HYPOTHESIS: Sleep and TL exert independent effects on subjective well-being among youth athletes, although alterations in sleep mediate a significant portion of the effect of TL on well-being in female youth athletes...
February 1, 2018: Sports Health
https://www.readbyqxmd.com/read/29401202/effects-of-different-plyometric-training-frequency-on-measures-of-athletic-performance-in-prepuberal-male-soccer-players
#6
Raja Bouguezzi, Helmi Chaabene, Yassine Negra, Rodrigo Ramirez-Campillo, Zied Jlalia, Bessem Mkaouer, Younés Hachana
This study aimed to compare the effects of one vs. two sessions of equal-weekly volume plyometric training (PT) across 8 weeks on measures of athletic performance (i.e., sprint-time, change of direction [CoD], jumping ability, and muscle strength) in prepuberal male soccer players. Thirty participants were randomly assigned either to one session PT group (1SPT [n=15]) or two sessions PT group (2SPT [n=15]). Plyometric training was integrated into their regular soccer training routine. Pre- and post-training tests for the assessment of sprint-time (e...
February 1, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29399588/career-length-and-injury-incidence-after-anterior-cruciate-ligament-reconstruction-in-major-league-soccer-players
#7
Amelia Joanna Hanford Arundale, Holly Jacinda Silvers-Granelli, Lynn Snyder-Mackler
Background: Little is known about career length after anterior cruciate ligament (ACL) reconstruction in Major League Soccer (MLS), the top men's professional soccer league in the United States. Further, it is unspecified whether athletes returning to soccer after ACL reconstruction are at a higher risk for injuries, beyond new knee injuries. Purpose: To examine career length and the incidence of lower extremity injuries in MLS athletes after ACL reconstruction in comparison with age-matched controls...
January 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29389692/optimal-reactive-strength-index-is-it-an-accurate-variable-to-optimize-plyometric-training-effects-on-measures-of-physical-fitness-in-young-soccer-players
#8
Rodrigo Ramirez-Campillo, Cristian Alvarez, Felipe García-Pinillos, Javier Sanchez-Sanchez, Javier Yanci, Daniel Castillo, Irineu Loturco, Helmi Chaabene, Jason Moran, Mikel Izquierdo
This study aimed to compare the effects of drop-jump training using a fixed drop-box height (i.e., 30-cm [FIXED]) versus an optimal drop-box height (i.e, 10-cm to 40-cm: generating an optimal [OPT] reactive strength index [RSI]) in youth soccer players' physical fitness. Athletes were randomly allocated to a control-group (CG: n=24; age=13.7 years), a fixed drop-box height group (FIXED, n=25; age=13.9 years) or an optimal drop-box height group (OPT, n=24; age=13.1 years). Before and after 7 weeks of training, tests for the assessment of jumping (countermovement jump [CMJ], five multiple bounds [MB]), speed (20-m sprint time), change of direction (Illinois change of direction test [CODT]), strength (RSI and 5 maximal squat repetition test [5RM]), endurance (2...
January 30, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29385963/accuracy-intra-and-inter-unit-reliability-and-comparison-between-gps-and-uwb-based-position-tracking-systems-used-for-time-motion-analyses-in-soccer
#9
Alejandro Bastida Castillo, Carlos D Gómez Carmona, Ernesto De la Cruz Sánchez, José Pino Ortega
There is interest in the accuracy and inter-unit reliability of position-tracking systems to monitor players. Research into this technology, although relatively recent, has grown exponentially in the last years, and it is difficult to find professional team sport that does not use Global Positioning System (GPS) technology at least. The aim of this study is to know the accuracy of both GPS-based and Ultra Wide Band (UWB)-based systems on a soccer field and their inter- and intra-unit reliability. A secondary aim is to compare them for practical applications in sport science...
January 31, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29385409/osteoarthritis-of-the-hip-and-knee-in-former-male-professional-soccer-players
#10
Stefano Petrillo, Rocco Papalia, Nicola Maffulli, Piero Volpi, Vincenzo Denaro
Background: Professional soccer (PS) players are at great risk of osteoarthritis (OA) of the knee and hip. Sources of data: Following the PRISMA guidelines, the key words 'osteoarthritis' and 'soccer' or 'football' were matched with 'players' or 'former' or 'retired' and with 'hip' or 'knee' on December 24, 2017 in the following databases: PubMed, Cochrane, Google scholar, Embase and Ovid. Only comparative studies reporting the prevalence rate of OA of both hip and knee joint in former PS athletes (fPSa) and age and sex matched controls were considered...
January 29, 2018: British Medical Bulletin
https://www.readbyqxmd.com/read/29376416/influence-of-well-being-variables-and-recovery-state-in-physical-enjoyment-of-professional-soccer-players-during-small-sided-games
#11
Okba Selmi, Bruno Gonçalves, Ibrahim Ouergui, Jaime Sampaio, Anissa Bouassida
This study aimed to assess the effects of the total quality of recovery and well-being indices (self-ratings of sleep during the preceding night, stress, fatigue and delayed onset muscle soreness) on rating of perceived exertion (RPE) and physical enjoyment (PE) during small-sided games. A total of 20 professional soccer players (25 ± 0.8 years) completed four 5-a-side game sessions of 25-min duration each (4 × 4 min work with 3-min passive recovery in-between). All variables were collected before each game session with the exception of RPE and Physical Activity Enjoyment Scale that were collected after...
January 28, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29376086/sport-specialization-characteristics-between-rural-and-suburban-high-school-athletes
#12
David R Bell, Eric G Post, Stephanie M Trigsted, Daniel A Schaefer, Timothy A McGuine, Andrew M Watson, M Alison Brooks
Background: Sport specialization has been associated with overuse injuries and is more common in larger high schools, which are often located in more urban/suburban settings. However, sport participation characteristics have not been compared between suburban and rural high schools. Purpose/Hypothesis: The purpose of this study was to examine the differences in sport participation characteristics between athletes at suburban and rural high schools. It was hypothesized that suburban high school students would be more likely to be highly specialized, participate in more athletic competitions per year, and play in a league outside of school...
January 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29374581/self-confidence-and-affect-responses-to-short-term-sprint-interval-training
#13
Walid Selmi, Haithem Rebai, Mokhtar Chtara, Abdelmajid Naceur, Sonia Sahli
The study aimed to investigate the effects of repeated sprint (RS) training on somatic anxiety (SA), cognitive anxiety (CA), self-confidence (SC), rating of perceived exertion (RPE) and repeated sprint ability (RSA) indicators in elite young soccer players. Thirty elite soccer players in the first football league (age: 17.8±0.9years) volunteered to participate in this study. They were randomly assigned to one of two groups: a repeated sprint training group (RST-G; n=15) and a control group (CON-G; n=15). RST-G participated in 6weeks of intensive training based on RS (6×(20+20m) runs, with 20s passive recovery interval between sprints, 3 times/week)...
January 25, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29373431/the-importance-of-strength-and-power-on-key-performance-indicators-in-elite-youth-soccer
#14
Christopher E Wing, Anthony N Turner, Chris J Bishop
The purpose of this investigation was to examine the importance of strength and power in relation to key performance indicators (KPI's) within competitive soccer match play. This was achieved through using an experimental approach where fifteen subjects were recruited from a professional soccer club's scholarship squad during the 2013/14 season. Following anthropometric measures, power and strength were assessed across a range of tests which included the squat jump (SJ), countermovement jump (CMJ), 20 metre (m) sprint and arrowhead change of direction test...
January 24, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29371223/broad-spectrum-physical-fitness-benefits-of-recreational-football-a-systematic-review-and-meta-analysis
#15
REVIEW
Zoran Milanović, Saša Pantelić, Nedim Čović, Goran Sporiš, Magni Mohr, Peter Krustrup
BACKGROUND: A previous meta-analysis showed that maximal oxygen uptake increased by 3.51 mL/kg/min (95% CI 3.07 to 4.15) during a recreational football programme of 3-6 months in comparison with continuous moderate-intensity running, strength training or a passive control group. In addition, narrative reviews have demonstrated beneficial effects of recreational football on physical fitness and health status. OBJECTIVE: The purpose of this systematic review and meta-analysis was to evaluate the magnitude of effects of recreational football on blood pressure, body composition, lipid profile and muscular fitness with reference to age, gender and health status...
January 25, 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29369953/preseason-maximal-aerobic-power-in-professional-soccer-players-among-different-divisions
#16
Michaelides A Marcos, Parpa M Koulla, Zacharia I Anthos
Marcos, MA, Koulla, PM, and Anthos, ZI. Preseason maximal aerobic power in professional soccer players among different divisions. J Strength Cond Res 32(2): 356-363, 2018-The purpose of this study was to examine and compare the anthropometric, maximal oxygen uptake (V[Combining Dot Above]O2max), and positional differences of first division (D1) professional football players from players of second (D2) and third (D3) divisions in Cyprus football leagues. Four hundred twenty-one professional male football players participated in this study...
February 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29369951/performance-differences-among-skilled-soccer-players-of-different-playing-positions-during-vertical-jumping-and-landing
#17
John R Harry, Leland A Barker, Roger James, Janet S Dufek
Harry, JR, Barker, LA, James, CR, and Dufek, JS. Performance differences among skilled soccer players of different playing positions during vertical jumping and landing. J Strength Cond Res 32(2): 304-312, 2018-Both jumping and landing performance of skilled soccer players is diminished when task demands are increased. However, it is unclear if performance changes are specific to players of certain playing positions. Therefore, we assessed jumping and landing performance among skilled soccer players of different playing positions...
February 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29365286/effect-of-cluster-set-warm-up-configurations-on-sprint-performance-in-collegiate-male-soccer-players
#18
Brett S Nickerson, Gerald T Mangine, Tyler D Williams, Ismael A Martinez
The purpose of this study was to determine if back squat cluster sets (CS) with varying inter-repetition rest periods would potentiate greater sprint performance compared to a traditional set parallel back squat in collegiate soccer players. Twelve collegiate male soccer players (21.0 ± 2.0 years; 180.0 ± 9.0 cm; 79.0 ± 9.5 kg) performed a 20-meter sprint prior to (PRE) a potentiation complex and at 1-, 4-, 7-, and 10-minutes post-exercise on three separate, randomized occasions. On each occasion, the potentiation complex consisted of 1 set of 3 repetitions at 85% one-repetition maximum (1RM) for the traditional parallel back squat...
January 24, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29364033/the-effects-of-cupping-on-hamstring-flexibility-in-collegiate-soccer-players
#19
Jeffrey G Williams, Hannah I Gard, Jeana M Gregory, Amy Gibson, Jennifer Austin
CONTEXT: Collegiate soccer players suffer hamstring injuries due to inflexibility and repetitive motions involving intense hamstring lengthening and contraction during sport. Although a popular intervention for muscular injury, there exists limited evidence of the effects of therapeutic cupping on hamstring flexibility. OBJECTIVE: To determine the effect of cupping therapy on hamstring flexibility in collegiate soccer players. DESIGN: Cohort design...
January 24, 2018: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29361835/activity-monitoring-in-men-s-college-soccer-a-single-season-longitudinal-study
#20
Lindsay V Slater, Ryan Baker, Arthur L Weltman, Jay Hertel, Susan A Saliba, Joseph M Hart
Performance in soccer has been characterized previously using time-motion analyses; however, it is unclear if men's college soccer shares performance characteristics with women's college or men's professional soccer. The purpose of this study was to compare proportions of matches spent walking, jogging, running, and sprinting in men's college soccer. Twenty-two male college soccer players wore global positioning system units during matches. Proportions of walking, jogging, running, high-speed running, and sprinting were calculated for each player based on time period (first half, second half, extra time) and outcome (win, loss, tie)...
January 23, 2018: Research in Sports Medicine
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