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https://www.readbyqxmd.com/read/29351500/differential-learning-as-a-key-training-approach-to-improve-creative-and-tactical-behavior-in-soccer
#1
Sara Santos, Diogo Coutinho, Bruno Gonçalves, Wolfgang Schöllhorn, Jaime Sampaio, Nuno Leite
PURPOSE: The aim of this study was to identify the effects of a differential-learning program, embedded in small-sided games, on the creative and tactical behavior of youth soccer players. Forty players from under-13 (U13) and under-15 (U15) were allocated into control and experimental groups and were tested using a randomized pretest to posttest design using small-sided games situations. METHOD: The experimental group participated in a 5-month differential-learning program embodied in small-sided games situations, while the control group participated in a typical small-sided games training program...
January 19, 2018: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/29351166/the-neuromuscular-biochemical-endocrine-and-mood-responses-to-small-sided-games-training-in-professional-soccer
#2
Sparkes W, Turner An, Weston M, Russell M, Johnston Mj, Kilduff Lp
The 24h responses to small-sided games (SSG) soccer training were characterized. Professional soccer players (n=16) performed SSG's (4vs4 + goalkeepers; 6x7-min, 2-min inter-set recovery) with performance (peak-power output, PPO; jump height, JH), physiological (blood creatine kinase: CK, lactate; salivary testosterone, cortisol), and mood measures collected before (baseline), and after (immediately; 0h, +2h, +24h). For PPO and JH, possibly small-moderate reductions occurred at 0h (-1.1W·kg; ±0.9W·kg, -3...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29351161/effects-of-contrast-strength-vs-plyometric-training-on-lower-limb-explosive-performance-ability-to-change-direction-and-neuromuscular-adaptation-in-soccer-players
#3
Mehrez Hammami, Nawel Gaamouri, Roy J Shephard, Mohamed Souhaiel Chelly
The aim was to compare the effects of two differing 8-week in-season strength training programs (contrast strength training [CST] vs. plyometric training [PT]) on selected performance tests (5 and 40m sprints, S 4 X 5 m change of direction test, squat (SJ) and countermovement (CMJ) jumps , leg peak power on a cycle ergometer force-velocity test, 1-repetition maximal (1-RM) half squat, and electromyographic [EMG] activity of the vastus lateralis, vastus medialis and rectus femoris muscles during vertical jump tests)...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29347013/correlations-in-magnitude-series-to-assess-nonlinearities-application-to-multifractal-models-and-heartbeat-fluctuations
#4
Pedro A Bernaola-Galván, Manuel Gómez-Extremera, A Ramón Romance, Pedro Carpena
The correlation properties of the magnitude of a time series are associated with nonlinear and multifractal properties and have been applied in a great variety of fields. Here we have obtained the analytical expression of the autocorrelation of the magnitude series (C_{|x|}) of a linear Gaussian noise as a function of its autocorrelation (C_{x}). For both, models and natural signals, the deviation of C_{|x|} from its expectation in linear Gaussian noises can be used as an index of nonlinearity that can be applied to relatively short records and does not require the presence of scaling in the time series under study...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29345547/are-current-physical-match-performance-metrics-in-elite-soccer-fit-for-purpose-or-is-the-adoption-of-an-integrated-approach-needed
#5
Paul S Bradley, Jack D Ade
Time-motion analysis is a valuable data-collection technique used to quantify the physical match performance of elite soccer players. For over 40 years researchers have adopted a 'traditional' approach when evaluating match demands by simply reporting the distance covered or time spent along a motion continuum of walking through to sprinting. This methodology quantifies physical metrics in isolation without integrating other factors and this ultimately leads to a one-dimensional insight into match performance...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345542/effects-of-late-night-training-on-slow-wave-sleep-episode-and-hour-by-hour-derived-nocturnal-cardiac-autonomic-activity-in-female-soccer-players
#6
Júlio A Costa, João Brito, Fábio Y Nakamura, Eduardo M Oliveira, António N Rebelo
PURPOSE: To assess the sensitivity of nocturnal heart rate variability (HRV) monitoring methods to the effects of late-night soccer training sessions in female athletes. METHODS: Eleven female soccer players competing in the 1st division of the Portuguese soccer league wore HR monitors during night-sleep throughout a one-week competitive in-season microcycle, after late-night training sessions (n = 3) and rest days (n = 3). HRV was analyzed through "slow-wave sleep episode" (SWSE; 10 min duration) and "hour-by-hour" (all the RR intervals recorded throughout the hours of sleep)...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345537/post-match-perceived-exertion-feeling-and-wellness-in-professional-soccer-players
#7
Mohamed Saifeddin Fessi, Wassim Moalla
PURPOSE: The aim of this study was to assess post-match perceived exertion, feeling and wellness according to the match outcome (winning, drawing or losing) in professional soccer players. METHODS: Twelve outfield players were followed during 52 official matches where the outcomes (win, draw or lose) were noted. Following each match players completed both a 10-point scale rating of perceived exertion (RPE) and an 11-point scale rating of perceived feeling. Rating of perceived sleep quality, stress, fatigue and muscle soreness were collected separately on a 7-point scale the day following each match...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29339997/the-relative-age-effect-on-soccer-players-in-formative-stages-with-different-sport-expertise-levels
#8
Alba Práxedes, Alberto Moreno, Luis García-González, David Pizarro, Fernando Del Villar
The Relative Age Effect (RAE) in sport has been targeted by many research studies. The objective of this study was to analyze, in amateur clubs, the RAE of soccer players, according to the sport expertise level of the team (e.g., A, B, C and subsequent) that they belong to within the same game category. 1,098 soccer players in formative stages took part in the study, with ages varying between 6 and 18 years old (U8 to U19 categories). All of them were members of 4 Spanish federated clubs. The birth dates were classified into 4 quartiles (Q1 = Jan-Mar; Q2 = Apr-Jun; Q3 = Jul-Sept; Q4 = Oct-Dec)according to the team they belonged to...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339995/physical-performance-and-anthropometric-characteristics-of-male-south-african-university-soccer-players
#9
Alliance Kubayi, Yvonne Paul, Prescott Mahlangu, Abel Toriola
Soccer is the most popular sport worldwide. Despite its global acclaim, scientific studies of soccer have tended to focus on tactics and techniques, thereby neglecting the physical and physiological profile of the players. Therefore, the purpose of this study was to examine physical and anthropometric characteristics of male South African university soccer players. Twenty-seven male soccer players aged 19 to 24 (mean age: 22.1 years; s = 1.5 years) volunteered to participate in the study. The results showed that goalkeepers (77...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339992/effects-of-passive-and-active-rest-on-physiological-responses-and-time-motion-characteristics-in-different-small-sided-soccer-games
#10
Ersan Arslan, Utku Alemdaroglu, Yusuf Koklu, Tahir Hazir, Surhat Muniroglu, Baris Karakoc
The purpose of this study was to investigate the effects of resting regimes on physiological responses and time motion characteristics between bouts during small sided games (SSGs) in young soccer players. Sixteen players (average age 16.87 ± 0.34 years; body height 176.69 ± 3.21 cm; body mass 62.40 ± 2.59 kg; training experience 3.75 ± 0.44 years) performed four bouts 2-a-side, 3-a-side and 4-a-side games with three minutes active (SSGar: Running at 70% of HRmax) and passive (SSGpr) rest between bouts at two-day intervals...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339991/multivariate-profiles-of-selected-versus-non-selected-elite-youth-brazilian-soccer-players
#11
Rodrigo Aquino, Isabella S Alves, Maickel B Padilha, Filipe Casanova, Enrico F Puggina, José Maia
This study determined whether a multivariate profile more effectively discriminated selected than non-selected elite youth Brazilian soccer players. This examination was carried out on 66 youth soccer players (selected, n = 28, mean age 16.3 ± 0.1; non-selected, n = 38, mean age 16.7 ± 0.4) using objective instruments. Multivariate profiles were assessed through anthropometric characteristics, biological maturation, tactical-technical skills, and motor performance. The Student's t-test identified that selected players exhibited significantly higher values for height (t = 2...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339990/high-intensity-small-sided-games-versus-repeated-sprint-training-in-junior-soccer-players
#12
Niyazi Eniseler, Çağatay Şahan, Ilker Özcan, Kıvanç Dinler
The aim of this study was to compare the effects of high-intensity small-sided games training (SSGT) versus repeated-sprint training (RST) on repeated-sprint ability (RSA), soccer specific endurance performance and short passing ability among junior soccer players. The junior soccer players were recruited from of a professional team (age 16.9 ± 1.1 years). The tests included the repeated-shuttle-sprint ability test (RSSAT), Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1) and Loughborough Soccer Passing Test (LSPT)...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339989/association-between-match-activity-variables-measures-of-fatigue-and-neuromuscular-performance-capacity-following-elite-competitive-soccer-matches
#13
Ian Varley, Ryan Lewin, Robert Needham, Robin T Thorpe, Ross Burbeary
The aim of the study was to assess the relationships between match activity variables, subsequent fatigue and neuromuscular performance capacity in elite soccer players. Subjects (n = 10) were professional soccer players participating in the English Championships. Match activity variables and markers of fatigue status were measured before and following two matches. Creatine kinase (CK) and muscle soreness were measured at baseline, immediately following, as well as 40 and 64 h post-match. Countermovement jump performance and perceived ratings of wellness were measured at baseline, then 40 and 64 h post-match...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339987/physiological-demands-morphological-characteristics-physical-abilities-and-injuries-of-female-soccer-players
#14
Zoran Milanović, Goran Sporiš, Nic James, Nebojša Trajković, Aleksandar Ignjatović, Hugo Sarmento, Athos Trecroci, Bruno Miguel Borges Mendes
The popularity of female soccer is increasing as well as the number of females playing soccer. Similarly, over the last twenty or so years, research in soccer has increased significantly, but a large disparity exists in the volume of studies involving male and female players. As a consequence of this, female players remain less well understood compared to males. The purpose of the present narrative review was to describe morphological characteristics, physiological demands, physical abilities and injuries in female soccer players...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29337833/effects-of-plyometric-and-resistance-training-on-muscle-strength-explosiveness-and-neuromuscular-function-in-young-adolescent-soccer-players
#15
Brandon John McKinlay, Phillip Wallace, Raffy Dotan, Devon Long, Craig Tokuno, David Gabriel, Bareket Falk
This study examined the effect of 8-weeks of free-weight-resistance (RT) and plyometric (PLYO) training on maximal strength, explosiveness and jump performance compared with no added training (CON), in young male soccer players. Forty-one 11[FIGURE DASH]13-year-old soccer players were divided into three groups (RT, PLYO, CON). All participants completed isometric and dynamic (240°/s) knee extensions pre- and post-training. Peak torque (pT), peak rate of torque development (pRTD), electromechanical-delay (EMD), rate of muscle activation (Q50), m...
January 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29337832/comparison-of-step-by-step-kinematics-in-repeated-30m-sprints-in-female-soccer-players
#16
Roland van den Tillaar
The aim of this study was to compare kinematics in repeated 30m sprints in female soccer players. Seventeen subjects performed seven 30m sprints every 30s in one session. Kinematics were measured with an infrared contact mat and laser gun, and running times with an electronic timing device. The main findings were that sprint times increased in the repeated sprint ability test. The main changes in kinematics during the repeated sprint ability test were increased contact time and decreased step frequency, while no change in step length was observed...
January 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29334309/effects-of-resisted-sprint-training-on-sprinting-ability-and-change-of-direction-speed-in-professional-soccer-players
#17
Saulo Gil, Renato Barroso, Everton Crivoi do Carmo, Irineu Loturco, Ronaldo Kobal, Valmor Tricoli, Carlos Ugrinowitsch, Hamilton Roschel
Resisted sprint training consists of performing overloaded sprints, which may produce greater effects than traditional sprint training. We compared a resisted sprint training with overload control versus an unresisted sprint training program on performance in soccer players. Eighteen elite athletes were randomly assigned to resisted (RST) or unresisted sprint training protocol (UR). Before and after a 6-week training period, sprinting ability, change of direction speed (COD), vertical jumps (SJ and CMJ), mean power (MP) and mean propulsive power (MPP) at distinct loads were assessed...
January 15, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29333946/does-inside-passing-contribute-to-the-high-incidence-of-groin-injuries-in-soccer-a-biomechanical-analysis
#18
Thomas Dupré, Johannes Funken, Ralf Müller, Kristian R L Mortensen, Filip Gertz Lysdal, Markus Braun, Hartmut Krahl, Wolfgang Potthast
Groin injuries are common in soccer and often cause time-loss from training. While groin injuries have been linked to full effort kicking, the role of inside passing is unclear. Therefore, the purpose of this study was to investigate hip joint kinematics and muscle force, stress and contraction velocity for adductor longus and gracilis during inside passing. 3D kinematics of ten soccer players (23.4 yrs; 77.5 kg; 1.81 m) were captured with a motion capture system inside a Footbonaut. Muscle force and contraction velocity were determined with AnyBody Modelling System...
January 15, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29329155/ecological-validity-and-reliability-of-an-age-adapted-endurance-field-test-in-young-male-soccer-players
#19
Carlo Castagna, Peter Krustrup, Stefano D'Ottavio, Carlo Pollastro, Andrea Bernardini, Susana Cristina Araújo Póvoas
The purpose of this study was to examine the reliability and the association with relevant match activities (ecological validity) of an age-adapted field test for intermittent high-intensity endurance known as Yo-Yo intermittent recovery level 1 children test (YYIR1C) in young male soccer players. Twenty-eight young male outfield soccer players (age 11.1±0.9 years, height 142±4.4 cm, body mass 37.0±5.9 kg) with at least 2 years of experience in soccer competitions were tested twice using YYIR1C and an age-adapted competitive small-sided game (i...
January 11, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29327823/a-previous-hamstring-injury-affects-kicking-mechanics-in-soccer-players
#20
Archit Navandar, Santiago Veiga, Gonzalo Torres, David Chorro, Enrique Navarro
BACKGROUND: Although the kicking skill is influenced by limb dominance and sex, how a previous hamstring injury affects kicking has not been studied in detail. Thus, the objective of this study was to evaluate the effect of sex and limb dominance on kicking in limbs with and without a previous hamstring injury. METHODS: 45 professional players (males: n=19, previously injured players=4, age=21.16 ± 2.00 years; females: n=19, previously injured players=10, age=22...
January 10, 2018: Journal of Sports Medicine and Physical Fitness
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