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https://www.readbyqxmd.com/read/28544170/hamstring-injury-prevention-in-soccer-before-or-after-training
#1
Ric Lovell, Michael Knox, Matthew Weston, Jason C Siegler, Scott Brennan, Paul W M Marshall
We examined the effects of a 12-week program of Nordic hamstring exercises (NHE), administered before or after football training, upon eccentric hamstring strength, muscle activity, and architectural adaptations. Amateur soccer players were randomized into 3 groups. The control group (CON; n=11) undertook core stability exercises, whereas a periodized NHE program was delivered either before (NHEBEF ; n=10) or after (NHEAFT ; n=14) bi-weekly training sessions. Outcome measures included peak torque and concomitant normalized peak surface electromyography signals (sEMG) of the biceps femoris (BF) and medial hamstring (MH) muscles during knee flexor maximal eccentric contractions, performed at 30°·s(-1) ...
May 24, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28538325/heart-rate-variability-discriminates-competitive-levels-in-professional-soccer-players
#2
Riccardo Proietti, Selenia di Fronso, Lucas A Pereira, Laura Bortoli, Claudio Robazza, Fabio Y Nakamura, Maurizio Bertollo
Proietti, R, di Fronso, S, Pereira, LA, Bortoli, L, Robazza, C, Nakamura, FY, and Bertollo, M. Heart rate variability discriminates competitive levels in professional soccer players. J Strength Cond Res 31(6): 1719-1725, 2017-Heart rate variability (HRV) has been increasingly used to monitor team sports athletes. Besides the traditional time domain indices (i.e., the SD of successive RR intervals [SDNN] and the root mean square difference of successive normal RR intervals [RMSSD]), recently the use of the stress score (SS), which is an inverse function of the SD2 index derived from the Poincaré plot, and the sympathetic/parasympathetic ratio (S/PS) to monitor soccer players has been proposed...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538299/maximal-sprinting-speed-of-elite-soccer-players-during-training-and-matches
#3
Leo Djaoui, Karim Chamari, Adam L Owen, Alexandre Dellal
Djaoui, L, Chamari, K, Owen, A, and Dellal, A. Maximal sprinting speed of elite soccer players during training and matches. J Strength Cond Res 31(6): 1509-1517, 2017-The aim of the present study was to compare (a) the maximal sprinting speed (MSS) attained by soccer players during matches (MSSmatch) according to their level of play (professional first French division vs. elite amateur fourth French division) and the playing positions and (b) the MSS attained by professional soccer players during 14 different types of small-sided games (SSG, MSSSSG) and match-play...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538298/quantifying-the-high-speed-running-and-sprinting-profiles-of-elite-female-soccer-players-during-competitive-matches-using-an-optical-player-tracking-system
#4
Jocelyn K Mara, Kevin G Thompson, Kate L Pumpa, Stuart Morgan
Mara, JK, Thompson, KG, Pumpa, KL, and Morgan, S. Quantifying the high-speed running and sprinting profiles of elite female soccer players during competitive matches using an optical player tracking system. J Strength Cond Res 31(6): 1500-1508, 2017-The aim of this study was to determine the high-speed running and sprinting profiles of elite female soccer players during competitive matches using a new Optical Player Tracking system. Eight stationary video cameras were positioned at vantage points surrounding the soccer field so that when each camera view was combined, the entire field could be viewed simultaneously...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538296/exercise-intensity-and-technical-demands-of-small-sided-soccer-games-for-under-12-and-under-14-players-effect-of-area-per-player
#5
Domenico Martone, Moreno Giacobbe, Adriano Capobianco, Esther Imperlini, Annamaria Mancini, Mario Capasso, Pasqualina Buono, Stefania Orrù
Martone, D, Giacobbe, M, Capobianco, A, Imperlini, E, Mancini, A, Capasso, M, Buono, P, and Orrù, S. Exercise intensity and technical demands of small-sided soccer games for under-12 and under-14 players: Effect of area per player. J Strength Cond Res 31(6): 1486-1492, 2017-The aim of this study was to evaluate the effects of 6 different areas per player (AP) on exercise intensity (EI) measured during small-sided games (SSGs) and expressed as percentage of maximal heart rate (%MHR) and technical actions (TAs) involvement with the ball, crosses, headers, tackles, shots on goal, dribbling, passing, and target passing-in U-12 and U-14 soccer players during SSGs...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538295/relationship-between-internal-load-indicators-and-changes-on-intermittent-performance-after-the-preseason-in-professional-soccer-players
#6
Miguel A Campos-Vazquez, Francisco J Toscano-Bendala, José C Mora-Ferrera, Luis J Suarez-Arrones
Campos-Vazquez, MA, Toscano-Bendala, FJ, Mora-Ferrera, JC, and Suarez-Arrones, LJ. Relationship between internal load indicators and changes on intermittent performance after the preseason in professional soccer players. J Strength Cond Res 31(6): 1477-1485, 2017-The aim of this study was to examine the effects of accumulated internal training load (ITL) during the preseason (4 weeks) on changes in the intermittent performance, in a professional soccer team. Twelve professionals soccer players (Mean ± SD age: 27...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538294/effects-of-different-combinations-of-strength-power-and-plyometric-training-on-the-physical-performance-of-elite-young-soccer-players
#7
Ronaldo Kobal, Irineu Loturco, Renato Barroso, Saulo Gil, Rogério Cuniyochi, Carlos Ugrinowitsch, Hamilton Roschel, Valmor Tricoli
Kobal, R, Loturco, I, Barroso, R, Gil, S, Cuniyochi, R, Ugrinowitsch, C, Roschel, H, and Tricoli, V. Effects of different combinations of strength, power, and plyometric training on the physical performance of elite young soccer players. J Strength Cond Res 31(6): 1468-1476, 2017-The combination of strength (ST) and plyometric training (PT) has been shown to be effective for improving sport-specific performance. However, there is no consensus about the most effective way to combine these methods in the same training session to produce greater improvements in neuromuscular performance of soccer players...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28533597/immediate-effect-of-ankle-balance-taping-on-dynamic-and-static-balance-of-soccer-players-with-acute-ankle-sprain
#8
Young-Jun Shin, Myoung-Kwon Kim
[Purpose] This study aimed to evaluate the immediate effect of ankle balance taping on balance ability of soccer players with acute ankle sprain. [Subjects and Methods] This study was conducted with 16 subjects who were diagnosed with ankle sprain. A cross-over randomized design was used. Each subject performed three interventions in a random order. Subjects were randomly assigned to an ankle balance taping, placebo taping, and no taping. For dynamic and static balance, ability was measured using BIORescue (RM Ingenierie, Rodes, France)...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28531627/a-cross-sectional-study-on-the-relationship-between-nutritional-knowledge-and-physical-fitness-in-soccer-players
#9
Pantelis T Nikolaidis, Eleni Theodoropoulou
No abstract text is available yet for this article.
June 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28523517/body-size-of-male-youth-soccer-players-1978-2015
#10
REVIEW
Robert M Malina, António J Figueiredo, Manuel J Coelho-E-Silva
BACKGROUND: Studies of the body size and proportions of athletes have a long history. Comparisons of athletes within specific sports across time, though not extensive, indicate both positive and negative trends. OBJECTIVE: To evaluate secular variation in heights and weights of male youth soccer players reported in studies between 1978 and 2015. METHODS: Reported mean ages, heights, and weights of male soccer players 9-18 years of age were extracted from the literature and grouped into two intervals: 1978-99 and 2000-15...
May 18, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28516234/assessing-long-term-return-to-play-after-hip-arthroscopy-in-football-players-evaluating-risk-factors-for-good-prognosis
#11
D Barastegui, R Seijas, P Alvarez-Diaz, E Rivera, E Alentorn-Geli, G Steinbacher, X Cuscó, R Cugat
PURPOSE: Groin pain is the third most common disease in football players and has often been associated with hip pathology such as femoroacetabular impingement and labral lesions. Hip arthroscopy offers possibilities of function restoration via minimally invasive procedures. The aim of this study is to evaluate professional football player's injuries and their return to play after hip arthroscopy for FAI and labral injuries. METHODS: Patients that underwent hip arthroscopy between 2009 and 2014 were selected retrospectively...
May 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28515972/determination-of-clinically-relevant-differences-in-frontal-plane-hop-tests-in-women-s-collegiate-basketball-and-soccer-players
#12
Kelly Hardesty, Eric J Hegedus, Kevin R Ford, Anh-Dung Nguyen, Jeffrey B Taylor
BACKGROUND: ACL injury prevention programs are less successful in female basketball players than in soccer players. Previous authors have identified anthropometric and biomechanical differences between the athletes and different sport-specific demands, including a higher frequency of frontal plane activities in basketball. Current injury risk screening and preventive training practices do not place a strong emphasis on frontal plane activities. The medial and lateral triple hop for distance tests may be beneficial for use in the basketball population...
April 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28514921/a-study-of-relationships-among-technical-tactical-physical-parameters-and-final-outcomes-in-elite-soccer-matches-as-analyzed-by-a-semiautomatic-video-tracking-system
#13
Cristoforo Filetti, Bruno Ruscello, Stefano D'Ottavio, Vito Fanelli
The performance of a soccer team depends on many factors such as decision-making, cognitive and physical skills, and dynamic ever-changing space-time interactions between teammate and opponents in relation to the ball. Seventy ( n = 70) matches of the Italian SERIE A season 2013-2014 were investigated to analyze the mean performance of 360 players in terms of physical (physical efficiency index; PEI) and technical-tactical (technical efficiency index; TEI) standpoints. Using a semiautomatic video analysis system that has incorporated new parameters able to measure technical-tactical and physical efficiency (Patent IB2010/002593, 2011-ISA), the correlation between these new variables and how much it relates to the likelihood of winning were verified...
June 2017: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/28503527/postactivation-potentiation-in-elite-young-soccer-players
#14
Adriano Titton, Emerson Franchini
The aim of this study was to investigate the acute effects of 16 different combinations to cause the postactivation potentiation (PAP) in elite young soccer players. Squat exercise in 4 different intensities (40%, 60%, 80%, and 100% one-repetition maximum [1RM]) was performed and its effects were evaluated in the performance of countermovement jump (CMJ), after 4 different recovery times (1, 3, 5, and 10 min). For this purpose, 25 young soccer players, underwent five experimental sessions. At the first session the control to determine 1RM in half-squat was carried out...
April 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28498791/the-influence-of-successive-matches-on-match-running-performance-during-an-under-23-international-soccer-tournament-the-necessity-of-individual-analysis
#15
Matthew C Varley, Valter Di Salvo, Mattia Modonutti, Warren Gregson, Alberto Mendez-Villanueva
This study investigated the effects of successive matches on match-running in elite under-23 soccer players during an international tournament. Match-running data was collected using a semi-automated multi-camera tracking system during an international under-23 tournament from all participating outfield players. Players who played 100% of all group stage matches were included (3 matches separated by 72 h, n = 44). Differences in match-running performance between matches were identified using a generalised linear mixed model...
May 12, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28493060/synthetic-turf-fields-crumb-rubber-and-alleged-cancer-risk
#16
Archie Bleyer
Most synthetic turf fields have crumb rubber interspersed among the simulated grass fibers to reduce athletic injuries by allowing users to turn and slide more readily as they play sports or exercise on the fields. Recently, the crumbs have been implicated in causing cancer in adolescents and young adults who use the fields, particularly lymphoma and primarily in soccer goalkeepers. This concern has led to the initiation of large-scale studies by local and federal governments that are expected to take years to complete...
May 11, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28491885/effects-of-sex-and-event-type-on-head-impact-in-collegiate-soccer
#17
Bryson B Reynolds, James Patrie, Erich J Henry, Howard P Goodkin, Donna K Broshek, Max Wintermark, T Jason Druzgal
BACKGROUND: The effects of head impact in sports are of growing interest for clinicians, scientists, and athletes. Soccer is the most popular sport worldwide, but the burden of head impact in collegiate soccer is still unknown. PURPOSE: To quantify head impact associated with practicing and playing collegiate soccer using wearable accelerometers. STUDY DESIGN: Descriptive epidemiological study. METHODS: Mastoid patch accelerometers were used to quantify head impact in soccer, examining differences in head impact as a function of sex and event type (practice vs game)...
April 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28489955/isometric-and-dynamic-strength-and-neuromuscular-attributes-as-predictors-of-vertical-jump-performance-in-11%C3%A2-13-year-old-male-athletes
#18
Brandon John McKinlay, Phillip J Wallace, Raffy Dotan, Devon Long, Craig Tokuno, David A Gabriel, Bareket Falk
In explosive contractions, neural activation is a major factor in determining the rate of torque development, while the latter is an important determinant of jump performance. However, the contribution of neuromuscular activation and rate of torque development to jump performance in children and youth is unclear. PURPOSE: To examine the relationships between the rate of neuromuscular activation, peak torque, rate of torque development, and jump performance in young male athletes. METHODS: Forty-one 12...
May 10, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28489685/solid-organ-laceration-in-an-adolescent-soccer-player-a-case-report
#19
Michael Visenio, Keely Buesing, Kody Moffatt
Pediatric solid organ lacerations are a relatively uncommon but potentially dangerous injury that must be addressed urgently once recognized. Seen most often during recreational or team sports, they usually occur after a blunt deceleration mechanism to the abdomen or flank. Depending on the severity of injury, solid organ laceration may not be immediately apparent clinically. This emphasizes the importance of sideline witnessing and evaluation, acting quickly once symptoms develop, and placing importance on safe sporting technique...
May 9, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28489629/modulation-of-isometric-quadriceps-strength-in-soccer-players-with-transcranial-direct-current-stimulation-a-crossover-study
#20
Valentine Z Vargas, Abrahão F Baptista, Guilherme O C Pereira, Alberto C Pochini, Benno Ejnisman, Marcelo B Santos, Silvia M A João, Fuad A Hazime
The aim of this study was to evaluate the effect of transcranial direct current stimulation (tDCS) on the maximum isometric muscle contraction (MVIC) of the knee extensors in soccer players at the pre-professional level. Twenty female soccer players aged 15 to 17 years (mean = 16.1; SD = 0.9) with 5.2 ± 2.6 years of training were randomly divided into two groups to receive either active or sham tDCS in a single session (2 mA; 0.057mA/cm). The MVIC of the knee extensors was evaluated in both lower limbs by manual dynamometry in five sets of contractions divided into four blocks: (0) pre-stimulation, (1) during tDCS, (2) 30 minutes post-tDCS, and (3) 60 minutes post-tDCS...
May 9, 2017: Journal of Strength and Conditioning Research
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