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https://www.readbyqxmd.com/read/28723816/importance-of-physical-qualities-for-speed-and-change-of-direction-ability-in-elite-female-soccer-players
#1
Stacey Emmonds, G Nicholson, C Beggs, B Jones, A Bissas
The purpose of this study was to determine the importance of physical qualities for speed and change of direction (CoD) ability in female soccer players. Data were collected on 10 female soccer players who were part of a professional English Women's Super League team. Player assessments included anthropometric (stature and body mass), body composition (dual-energy X-ray absorptiometry), speed (10m, 30m sprint), CoD ability (505 agility), aerobic (Yo-Yo Intermittent Recovery Test), lower-body strength (bilateral knee extensions) and power (countermovement jump [CMJ], squat jump [SJ], 30cm drop jump [DJ]) measures...
July 17, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28714774/small-sided-games-in-elite-soccer-does-one-size-fits-all
#2
Mathieu Lacome, Ben M Simpson, Yannick Cholley, Philippe Lambert, Martin Buchheit
PURPOSE: To compare the peak intensity of typical Small Sided Games (SSGs) with those of official matches in terms of running demands and mechanical work over different rolling average durations and playing positions. METHOD: Data were collected in 21 players (25±5 y, 181±7 cm, 77±7 kg) belonging to an elite French football team. SSG data were collected over two seasons during typical training sessions (249 files, 12±4 per player) and official matches (n=12)...
July 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28713455/a-pilot-study-of-the-effect-of-outsole-hardness-on-lower-limb-kinematics-and-kinetics-during-soccer-related-movements
#3
Dong Sun, Qichang Mei, Julien S Baker, Xuewen Jia, Yaodong Gu
The purpose of this study was to investigate the effect of different outsole hardness of turf cleats shoes on the lower limb kinematics and kinetics of soccer players playing on artificial turf. The participants were required to complete tasks of straight running and 45° left sidestep cutting movements, respectively, at the speed of 4.5 ± 0.2 m/s on artificial turf. They were asked to randomly select turf cleats shoes with a soft outsole (SO), medium hardness outsole (MO) and hard outsole (HO). During the stance phase of straight running, peak pressure and force-time integral in medial forefoot (MFF) of players wearing cleats shoes with MO were significantly higher than those wearing cleats shoes with SO...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28704313/between-game-variation-of-physical-soccer-performance-measures-in-highly-trained-youth-soccer-players
#4
Greg Doncaster, Viswanath Unnithan
To assess the between-game variation in measures of physical performance during 11 v 11 soccer match-play, over a short period of time, in highly trained youth soccer players. A single cohort observational study design was employed. Physical match performance data were collected from 17 male, highly trained youth soccer players (age: 13.3 ± 0.4 y) over three, 2 x 20min, 11 v 11 matches. Using 10 Hz GPS, the variables selected for analyses were total distance (TD), high-speed running (HSR), very high-speed running (VHSR), number of high-speed running efforts (HSReff) and number of very high-speed running efforts (VHSReff)...
July 12, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28704308/fatigue-in-u12-soccer-7-players-during-repeated-one-day-tournament-games-a-pilot-study
#5
Javier Sanchez-Sanchez, Mario Sanchez, Daniel Hernandez, Rodrigo Ramirez-Campillo, Cristian Martínez, Fabio Y Nakamura
The aim of this study was to describe and compare the distances and displacement speeds of U12 Soccer-7 athletes during four tournament Soccer-7 games (TG) played in less than 24-h (experimental condition) with those recorded during two league Soccer-7 games (LG) with 24-h of rest prior to the match (control condition). Ten participants (age = 10.3 ± 0.5 years) were recruited for the study. Main data analyzed during games included distance completed relative to match duration (Drel), maximal velocity and distance completed at different running speeds (including acceleration, deceleration, standing, walking, jogging, medium-intensity running, high-intensity running and sprinting)...
July 12, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28699924/position-specific-acceleration-and-deceleration-profiles-in-elite-youth-and-senior-soccer-players
#6
Jeppe F Vigh-Larsen, Ulrik Dalgas, Thomas B Andersen
The purpose of the study was to characterize and compare the position specific activity profiles of young and senior elite soccer players with special emphasis put on accelerations and decelerations. Eight professional senior matches were tracked using the ZXY tracking system and analyzed for number of accelerations and decelerations and running distances within different speed zones. Likewise, four U19- and five U17 matches were analyzed for comparison between youth and senior players. In senior players the total distance (TD) was 10776±107 m with 668±28 and 143±10 m being high-intensity running (HIR) and sprinting, respectively...
April 4, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28692649/individual-ball-possession-in-soccer
#7
Daniel Link, Martin Hoernig
This paper describes models for detecting individual and team ball possession in soccer based on position data. The types of ball possession are classified as Individual Ball Possession (IBC), Individual Ball Action (IBA), Individual Ball Control (IBC), Team Ball Possession (TBP), Team Ball Control (TBC) und Team Playmaking (TPM) according to different starting points and endpoints and the type of ball control involved. The machine learning approach used is able to determine how long the ball spends in the sphere of influence of a player based on the distance between the players and the ball together with their direction of motion, speed and the acceleration of the ball...
2017: PloS One
https://www.readbyqxmd.com/read/28683419/deviating-running-kinematics-and-hamstring-injury-susceptibility-in-male-soccer-players-cause-or-consequence
#8
Joke Schuermans, Damien Van Tiggelen, Tanneke Palmans, Lieven Danneels, Erik Witvrouw
BACKGROUND: Although the vast majority of hamstring injuries in male soccer are sustained during high speed running, the association between sprinting kinematics and hamstring injury vulnerability has never been investigated prospectively in a cohort at risk. PURPOSE: This study aimed to objectify the importance of lower limb and trunk kinematics during full sprint in hamstring injury susceptibility. STUDY DESIGN: Cohort study; level of evidence, 2...
June 27, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28658075/evaluation-of-the-official-match-external-load-in-soccer-players-with-cerebral-palsy
#9
J Yanci, D Castillo, A Iturricastillo, R Reina
The aims of this study were to analyze the official match external loads (i.e. total distance [TD], distance covered at different speeds, accelerations, decelerations, player load [PL], peak metabolic power [PMP] and changes of direction [CODs]) of football players with cerebral palsy (CP), and to determine the external loads according to playing time (i.e. < 20 min, 20-40 min and > 40 min). The external load of thirty-one international football players with CP (23.0 ± 6.6 years; 69.1 ± 9.0 kg; 174...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28639440/the-relationship-between-jumping-performance-isokinetic-strength-and-dynamic-postural-control-in-elite-youth-soccer-players
#10
Robert Śliwowski, Monika Grygorowicz, Andrzej Wieczorek, Łukasz Jadczak
BACKGROUND: The aim of this study was (i) to investigate the relationship between vertical jumping performance, isokinetic strength of knee extensors/flexors, and postural priority and (ii) an attempt to describe a multiple regression model that accounts for the effects of selected parameters of isokinetic strength and postural priority on vertical jumping performance. METHODS: Thirty-one professional male soccer players, aged from 17 to 20 years, participated in this study (mean age: ± SD 18,6 ± 1...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28630578/are-change-of-direction-speed-and-reactive-agility-useful-for-determining-the-optimal-field-position-for-young-soccer-players
#11
Giovanni Fiorilli, Enzo Iuliano, Michalis Mitrotasios, Eugenio M Pistone, Giovanna Aquino, Giuseppe Calcagno, Alessandra di Cagno
Change Of Direction Speed (CODS) and Reactive Agility (RA) are two determining factors in the ability of young soccer players. We aimed to verify if CODS and RA could be useful in order to establish the best young soccer player field position. Ninety-two elite soccer players (15.18 ± 1.21 years, weight 59.18 ± 9.93, height 1.72 ± 0.08, BMI 19.76 ± 2.22), belonging to two youth categories from the Italian First and Second Divisions, volunteered in this study. The participants included 32 defenders (15.06 ± 0...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28597616/comparison-of-the-movement-patterns-between-small-and-large-side-games-training-and-competition-in-professional-soccer-players
#12
Jesús V Giménez, Juan Del-Coso, Anthony S Leicht, Miguel A Gomez
BACKGROUND: The purpose of this investigation was to compare the movement patterns of professional soccer players during a small-sided game (SSG), a large-sided game (LSG) and a competitive friendly match (FM). METHODS: Fourteen professional players participated in three training routines with a similar relative pitch area per player. The SSG and LSG consisted of 8 repetitions of 4-min game play, interspersed by 2-min of active recovery, and their data were compared to the first 32 minutes of a FM...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28595870/high-speed-running-and-sprinting-as-an-injury-risk-factor-in-soccer-can-well-developed-physical-qualities-reduce-the-risk
#13
Shane Malone, Adam Owen, Bruno Mendes, Brian Hughes, Kieran Collins, Tim J Gabbett
OBJECTIVES: This study investigated the association between high-speed running (HSR) and sprint running (SR) and injuries within elite soccer players. The impact of intermittent aerobic fitness as measured by the end speed of the 30-15 intermittent fitness test (30-15VIFT) and high chronic workloads (average 21-day) as potential mediators of injury risk were also investigated. DESIGN: Observational Cohort Study. METHODS: 37 elite soccer players from one elite squad were involved in a one-season study...
May 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28595867/the-match-to-match-variation-of-match-running-in-elite-female-soccer
#14
Joshua Trewin, César Meylan, Matthew C Varley, John Cronin
OBJECTIVES: The purpose of this study was to examine the match-to-match variation of match-running in elite female soccer players utilising GPS, using full-match and rolling period analyses. DESIGN: Longitudinal study. METHODS: Elite female soccer players (n=45) from the same national team were observed during 55 international fixtures across 5 years (2012-2016). Data was analysed using a custom built MS Excel spreadsheet as full-matches and using a rolling 5-min analysis period, for all players who played 90-min matches (files=172)...
May 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28595239/changes-in-sprint-related-outcomes-during-a-period-of-systematic-training-in-a-girls-soccer-academy
#15
Matthew David Wright, Greg Atkinson
Longitudinal data tracking performance indicators collected during structured training are lacking in young female soccer players. Therefore, changes in 5-m acceleration, 20-m speed, change-of-direction speed and repeated-sprint ability were quantified during a three-year period in an FA Centre of Excellence. Fourteen players (mean age = 12.1 years, SD = ±0.9) were recruited and their best performance scores from pre-season and in-season testing were averaged. Players were typically exposed to soccer (2 x 90 min per week) and strength and conditioning training (1 x 70 min per week) and played 20 soccer matches (50-80 min) during 35-week seasons...
June 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28557851/decrements-in-neuromuscular-performance-and-increases-in-creatine-kinase-impact-training-outputs-in-elite-soccer-players
#16
Shane Malone, Bruno Mendes, Brian Hughes, Mark Roe, Simon Devenney, Kieran Collins, Adam Owen
The aim of the current investigation was to understand the impact of pre-training neuromuscular performance and creatine kinase status on subsequent training performance in elite soccer players. Thirty soccer players (age: 25.3 ± 3.1 years; height: 183 ± 7 cm; mass: 72 ± 7 kg) were involved in this observational study. Each morning prior to training, players completed assessments for neuromuscular performance (countermovement jump; CMJ) and creatine kinase (CK) levels. Global positioning technology provided external load: total distance, high-speed distance, sprint distance, accelerations, decelerations, average metabolic power, explosive distance, high metabolic power distance (>25...
May 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538299/maximal-sprinting-speed-of-elite-soccer-players-during-training-and-matches
#17
Leo Djaoui, Karim Chamari, Adam L Owen, Alexandre Dellal
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. All players monitored through the study performed a 40-m sprint test to assess individual MSS (MSStest) and compare it to the training and match activity, with the calculation of the percentage of MSStest (%MSStest) reached...
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
#18
Jocelyn K Mara, Kevin G Thompson, Kate L Pumpa, Stuart Morgan
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. After each match, an optical player tracking system detected the coordinates (x, y) of each player for every video frame. Algorithms applied to the x and y coordinates were used to determine activity variables for 12 elite female players across 7 competitive matches...
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
#19
Miguel A Campos-Vazquez, Francisco J Toscano-Bendala, José C Mora-Ferrera, Luis J Suarez-Arrones
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: 27.7 ± 4.3 years; height: 177.1 ± 6.2 cm; body mass: 73.1 ± 5.2 kg; % body fat [Faulkner]: 10.2 ± 1.2) belonging to a Spanish second division team (2013-2014) participated in this study. The 30-15 intermittent fitness test was performed before and after the preseason, and the speed for the last period completed by each player was recorded (VIFT)...
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
#20
Ronaldo Kobal, Irineu Loturco, Renato Barroso, Saulo Gil, Rogério Cuniyochi, Carlos Ugrinowitsch, Hamilton Roschel, Valmor Tricoli
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. Thus, the purpose of this study was to compare the effects of different combinations of ST and PT sequences on strength, jump, speed, and agility capacities of elite young soccer players...
June 2017: Journal of Strength and Conditioning Research
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