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https://www.readbyqxmd.com/read/28422524/straight-line-and-change-of-direction-intermittent-running-in-professional-soccer-players
#1
Mohamed S Fessi, Fayçal Farhat, Alexandre Dellal, James J Malone, Wassim Moalla
PURPOSE: The present study aimed to investigate the difference between straight-line (STL) and change of direction (COD) intermittent running exercises in soccer players. METHODS: Seventeen male professional soccer players performed the agility T-test and 6 intermittent running exercises: 10s at 130% of maximal aerobic speed (MAS) alternated with 10s of rest (10-10), 15s at 120% of MAS alternated with 15s of rest (15-15) and 30s at 110% of MAS alternated with 30s of rest (30-30) both in STL and with COD...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28395147/acute-effect-of-stretching-modalities-on-global-coordination-and-kicking-accuracy-in-12-13year-old-soccer-players
#2
Mohamed Frikha, Mohammad S Derbel, Nesrine Chaâri, Adnene Gharbi, Karim Chamari
The aim of the study was to compare the effect of stretching procedures on global coordination and accuracy in instep soccer kicks achieved in different stress conditions. Twenty male young soccer players completed the global coordination test (GC), the instep kicking accuracy test in free (FKA) and in time-pressure (TPKA) conditions, either after static (SS), dynamic (DS), ballistic (BS) or no-stretching (CTR) protocols, on nonconsecutive days and in a randomized order. After performing a 5min standardized intensity jogging (70% of MAV), followed by stretching exercises for 10min, each participant completed, successively, the GC, FKA and TPKA tests...
April 7, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28387540/n-3-fatty-acid-supplementation-during-4-weeks-of-training-leads-to-improved-anaerobic-endurance-capacity-but-not-maximal-strength-speed-or-power-in-soccer-players
#3
Leyre Gravina, Frankie F Brown, Lee Alexander, James Dick, Gordon Bell, Oliver C Witard, Stuart D R Galloway
Omega-3 fatty acid (n-3 FA) supplementation could promote adaptation to soccer-specific training. We examined the impact of a 4 wk period of n-3 FA supplementation during training on adaptations in 1RM knee extensor strength, 20m sprint speed, vertical jump power, and anaerobic endurance capacity (Yo-Yo test) in competitive soccer players. Twenty six soccer players were randomly assigned to one of two groups: n-3 FA supplementation (n-3 FA; n=13) or placebo (n=13). Both groups performed two experimental trial days...
April 7, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28359608/changes-in-ventilatory-response-to-exercise-in-trained-athletes-respiratory-physiological-benefits-beyond-cardiovascular-performance
#4
Adriano di Paco, Bruno-Pierre Dubé, Pierantonio Laveneziana
INTRODUCTION: The beneficial impact of an 8-month competitive season on the ventilatory profile response to exercise in soccer players has never been evaluated. MATERIAL AND METHODS: Ventilatory profile (evaluated by determining individual tidal volume [VT] relative to minute ventilation [VE] inflection points during exercise) and metabolic responses to incremental exercise were evaluated in 2 professional soccer teams before and after an 8-month competitive season...
March 27, 2017: Archivos de Bronconeumología
https://www.readbyqxmd.com/read/28344734/aerobic-capacity-is-related-to-repeated-sprint-ability-with-sprint-distances-less-than-40-meters
#5
Gabriel J Sanders, Zachary Turner, Brian Boos, Corey A Peacock, Willard Peveler, Alar Lipping
Research is inconclusive regarding the association between aerobic fitness (objectively measured VO2max) and repeated sprint performance when the sprints are less than 40 meters. Soccer athletes must be able to repeat sprints without significant decreases in speed and strength and conditioning coaches need to better understand if aerobic fitness is related to repeated sprint ability (RSA). Twenty (10 male, 10 female) Division I soccer athletes first completed a graded maximal treadmill test to measure VO2max...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28344461/within-session-sequence-of-balance-and-plyometric-exercises-does-not-affect-training-adaptations-with-youth-soccer-athletes
#6
Mehdi Chaouachi, Urs Granacher, Issam Makhlouf, Raouf Hammami, David G Behm, Anis Chaouachi
The integration of balance and plyometric training has been shown to provide significant improvements in sprint, jump, agility, and other performance measures in young athletes. It is not known if a specific within session balance and plyometric exercise sequence provides more effective training adaptations. The objective of the present study was to investigate the effects of using a sequence of alternating pairs of exercises versus a block (series) of all balance exercises followed by a block of plyometric exercises on components of physical fitness such as muscle strength, power, speed, agility, and balance...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28340491/comparison-of-skillful-vs-less-skilled-young-soccer-players-on-anthropometric-maturation-physical-fitness-and-time-of-practice
#7
Márcio André de Gouvêa, Edilson Serpeloni Cyrino, João Valente-Dos-Santos, Alex Silva Ribeiro, Danilo Rodrigues Pereira da Silva, David Ohara, Manuel J Coelho-E-Silva, Enio Ricardo Vaz Ronque
This study compared maturation, body composition and physical fitness between youth soccer athletes with different technical skills levels. Sixty-two young athletes (11-17 years) were categorized dichotomously in more skilled (n=31) and less skilled (n=31) groups based on 3 specific technical tests (Dribbling Speed Test [DST], Shuttle Dribble Test [SDT] and Slalom Dribble Test [SLDT]). Chronological and skeletal age, time of practice, body composition and 4 physical fitness tests were performed for comparisons...
March 24, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28338366/effects-of-bout-duration-on-players-internal-and-external-loads-during-small-sided-games-in-young-soccer-players
#8
Yusuf Köklü, Utku Alemdaroğlu, Hamit Cihan, Del P Wong
PURPOSE: This study investigated the effects of different bout durations on internal and external loads of young soccer players during different small-sided games (SSGs). METHOD: Fifteen male young soccer players (average age 17 ± 1 years) participated in 2 vs 2, 3 vs 3 and 4 vs 4 SSGs. All games lasted 12 min playing time in total, but each SSG format further consisted of four bout durations: continuous (CON: 1 bout x 12 min) or interval with short (SBD: 6 bouts x 2 min), medium (MBD: 3 bouts x 4 min) or long (LBD: 2 bouts x 6 min) bout durations...
March 24, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28323574/the-effects-of-an-increased-calorie-breakfast-consumed-prior-to-simulated-match-play-in-academy-soccer-players
#9
Marc A Briggs, Liam D Harper, Ged McNamee, Emma Cockburn, Penny L S Rumbold, Emma J Stevenson, Mark Russell
Dietary analysis of Academy soccer players highlights that total energy and carbohydrate intakes are less than optimal, especially, on match-days. As UK Academy matches predominantly kick-off at ∼11:00 h, breakfast is likely the last pre-exercise meal and thus may provide an intervention opportunity on match-day. Accordingly, the physiological and performance effects of an increased calorie breakfast consumed ∼135-min before soccer-specific exercise was investigated. English Premier League Academy soccer players (n = 7) repeated a 90-min soccer match simulation on two occasions after consumption of habitual (Bhab; ∼1100 kJ) or increased (Binc; ∼2100 kJ) energy breakfasts standardised for macronutrient contributions (∼60% carbohydrates, ∼15% proteins and ∼25% fats)...
March 21, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28315285/effects-of-plyometric-training-on-physical-fitness-in-prepuberal-soccer-athletes
#10
Yassine Negra, Helmi Chaabene, Senda Sammoud, Raja Bouguezzi, Mohamed Aymen Abbes, Younés Hachana, Urs Granacher
This study aimed at examining the effects of plyometric training on stable (SPT) vs. unstable (UPT) surfaces on physical fitness in prepuberal soccer players. Male athletes were randomly assigned to SPT (n=18; age=12.7±0.2 years) or UPT (n=16; age=12.2±0.5 years). Both groups conducted 3 regular soccer training sessions per week combined with either 2 SPT or UPT sessions. Assessment of jumping ability (countermovement jump [CMJ], and standing long jump [SLJ]), speed (10-m, 20-m, 30-m sprint), agility (Illinois agility test [IAT]), and balance (stable [SSBT], unstable [USBT] stork balance test; stable [SYBT], unstable [UYBT] Y balance test) was conducted pre-and post-training...
March 17, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28263670/proximal-neuromuscular-control-protects-against-hamstring-injuries-in-male-soccer-players
#11
Joke Schuermans, Lieven Danneels, Damien Van Tiggelen, Tanneke Palmans, Erik Witvrouw
BACKGROUND: With their unremittingly high incidence rate and detrimental functional repercussions, hamstring injuries remain a substantial problem in male soccer. Proximal neuromuscular control ("core stability") is considered to be of key importance in primary and secondary hamstring injury prevention, although scientific evidence and insights on the exact nature of the core-hamstring association are nonexistent at present. HYPOTHESIS: The muscle activation pattern throughout the running cycle would not differ between participants based on injury occurrence during follow-up...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28253042/monitoring-elite-soccer-players-external-loads-using-real-time-data
#12
Steve Barrett
PURPOSE: The principle aim of the study was to assess the validity of measuring locomotor activities and PlayerLoad using Real-Time (RT) data collection during soccer training. METHODS: Twenty-nine (n=29) English soccer players participated. Each player wore the same MEMS device (S5, Optimeye, CatapultSports, Melbourne, Australia) during twenty-one training sessions (n= 331 data sets) in the 2015/2016 and 2016/2017 season. A Real-Time receiver (TRX, Catapultsports, Melbourne, Australia) was used to collect the locomotor activities and PlayerLoad data in RT and compared with the post-event downloaded (PED) data...
March 2, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28240711/a-self-paced-team-sport-match-simulation-results-in-reductions-in-voluntary-activation-and-modifications-to-biological-perceptual-and-performance-measures-at-half-time-and-for-up-to-96-hours-post-match
#13
Paul Tofari, Justin Kemp, Stuart Cormack
Assessing responses to soccer match-play is limited by match variability or unrealistic simulations. To address this, the biological, perceptual, and performance response were assessed using a self-paced, simulated soccer match protocol using a non-motorized treadmill. Twelve male team-sport athletes performed the 90-min simulation. Match activity; quadriceps twitch interpolation [voluntary activation (%VA) and potentiated twitch (POT)]; biochemical markers; strength and power performance; rating of perceived exertion (RPE) and self-report wellness were collected pre-, half-time, post-, and 2, 24, 48, 72 and 96-h post-match...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28225689/sex-differences-in-anthropometrics-and-heading-kinematics-among-division-i-soccer-athletes
#14
Abigail C Bretzin, Jamie L Mansell, Ryan T Tierney, Jane K McDevitt
BACKGROUND: Soccer players head the ball repetitively throughout their careers; this is also a potential mechanism for a concussion. Although not all soccer headers result in a concussion, these subconcussive impacts may impart acceleration, deceleration, and rotational forces on the brain, leaving structural and functional deficits. Stronger neck musculature may reduce head-neck segment kinematics. HYPOTHESIS: The relationship between anthropometrics and soccer heading kinematics will not differ between sexes...
March 2017: Sports Health
https://www.readbyqxmd.com/read/28198600/relationship-between-field-tests-and-match-running-performance-in-high-level-young-brazilian-soccer-players
#15
Rodrigo Aquino, Luiz H Palucci Vieira, Lucas de Paula Oliveira, Luiz G Cruz Goncalves, Paulo R Pereira Santiago
BACKGROUND: The main aim of this study was to analyse the relationship between field tests and match running performance using computational tracking technology in high-level young Brazilian soccer players. METHODS: Twenty-five young male Brazilian soccer players participated in this study (U-15, n = 13; U-17, n = 12). In the same week the players were submitted to field tests and actual matches. The field tests were: Maximum Speed (10m-30m), Zig-Zag, Running-based Anaerobic Sprint Test, and Yo-Yo Intermittent Recovery Test level 1...
February 14, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28192512/explosive-strength-and-endurance-adaptations-in-young-elite-soccer-players-during-two-soccer-seasons
#16
Riccardo Di Giminiani, Christiano Visca
The purpose of the present study was to investigate the explosive strength and endurance adaptations in young elite soccer players who underwent a supervised training program for a period of two years. Nineteen players, with seven years of training experience (age: 13.3 ± 0.1 years; body weight: 57.9 ± 4.9 kg; height: 168.9 ± 4.7 cm; BMI: 20.1 ± 1.1 kg/m2), voluntarily participated in the present study. The testing sessions were performed at the beginning of the preparation period in the first (T1), second (T2), and third year (T3)...
2017: PloS One
https://www.readbyqxmd.com/read/28190999/higher-drop-in-speed-during-a-repeated-sprint-test-in-soccer-players-reporting-former-hamstring-strain-injury
#17
Ola D Røksund, Morten Kristoffersen, Bård E Bogen, Alexander Wisnes, Merete S Engeseth, Ann-Kristin Nilsen, Vegard V Iversen, Silje Mæland, Hilde Gundersen
Aim: Hamstring strain injury is common in soccer. The aim of this study was to evaluate the physical capacity of players who have and have not suffered from hamstring strain injury in a sample of semi-professional and professional Norwegian soccer players in order to evaluate characteristics and to identify possible indications of insufficient rehabilitation. Method: Seventy-five semi-professional and professional soccer players (19 ± 3 years) playing at the second and third level in the Norwegian league participated in the study...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28186497/agility-in-young-athletes-is-it-a-different-ability-from-speed-and-power
#18
Yassine Negra, Helmi Chaabene, Mehréz Hammami, Samiha Amara, Senda Sammoud, Bessem Mkaouer, Younés Hachana
Negra, Y, Chaabene, H, Hammami, M, Amara, S, Sammoud, S, Mkaouer, B, and Hachana, Y. Agility in young athletes: is it a different ability from speed and power? J Strength Cond Res 31(3): 727-735, 2017-Agility is an important physical attribute for successful participation in team sports events. Illinois agility test (IAT) and T-test have been widely used within adult team sports players to assess agility performance. The purposes of this investigation are (a) to study the reliability and the sensitivity of both IAT and T-test scores and (b) to explore to what extend the agility is an independent physical ability from speed time and jumping ability...
March 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28177711/the-influence-of-genetic-polymorphisms-on-performance-cardiac-and-hemodynamic-parameters-among-brazilian-soccer-players
#19
Thiago José Dionísio, Carlos Rogério Thiengo, Daniel Thomas Brozoski, Evandro José Dionísio, Guilherme Augusto Talamoni, Roberto Braga Silva, Gustavo Pompermaier Garlet, Carlos Ferreira Santos, Sandra Lia Amaral
This study investigated whether ACTN3 R577X, AMPD1 C34T, I/D ACE and M235T AGT polymorphisms can affect performance tests such as jumping, sprinting and endurance in 220 young male athletes from professional minor league soccer team from São Paulo Futebol Clube, Brazil. I/D ACE and M235T AGT polymorphisms were also analyzed according to cardiac and hemodynamic parameters. Athletes were grouped or not by age. DNA from saliva and Taqman® assays were used for genotyping 220 athletes and the results were associated with performance tests...
January 24, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28173971/the-acceleration-and-deceleration-profiles-of-elite-female-soccer-players-during-competitive-matches
#20
Jocelyn K Mara, Kevin G Thompson, Kate L Pumpa, Stuart Morgan
OBJECTIVES: The aim of this study was to determine the acceleration (≥2ms(-2)) and deceleration (≤-2ms(-2)) profiles of elite female soccer players during competitive matches. DESIGN: Single cohort, observational study. METHODS: An Optical Player Tracking system was used to determine acceleration (≥2ms(-2)) and deceleration (≤-2ms(-2)) variables for twelve elite female players across seven competitive matches. RESULTS: In total, players performed 423 (±126) accelerations and 430 (±125) decelerations per match...
January 24, 2017: Journal of Science and Medicine in Sport
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