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https://www.readbyqxmd.com/read/28714774/small-sided-games-in-elite-soccer-does-one-size-fits-all
#1
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/28713463/cardiopulmonary-performance-during-maximal-exercise-in-soccer-players-with-alterations-in-renal-function
#2
Anderson Pontes Morales, Felipe Sampaio-Jorge, Luiz Felipe da Cruz Rangel, Jackson de Souza Menezes, Tiago Costa Leite, Beatriz Gonçalves Ribeiro
The aim of this study was to evaluate the curves of cardiorespiratory variables during cardiopulmonary exercise testing (CPET) in soccer players who had acute alterations in the glomerular filtration rate (GFR) after performing the pre-season training protocol. Sixteen male professional soccer players (25 ± 3 years; 179 ± 2 cm; and 77 ± 6 kg) were evaluated for oxygen uptake (VO2), heart rate (HR) and pulse relative oxygen (relative O2 Pulse) curves with intervals corresponding to 10% of the total duration of CPET...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28704884/prone-hip-extension-muscle-recruitment-is-associated-with-hamstring-injury-risk-in-amateur-soccer
#3
Joke Schuermans, Damien Van Tiggelen, Erik Witvrouw
'Core stability' is considered essential in rehabilitation and prevention. Particularly with respect to hamstring injury prevention, assessment and training of lumbo-pelvic control is thought to be key. However, supporting scientific evidence is lacking. To explore the importance of proximal neuromuscular function with regard to hamstring injury susceptibility, this study investigated the association between the Prone Hip Extension (PHE) muscle activation pattern and hamstring injury incidence in amateur soccer players...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704316/effects-of-a-tapering-period-on-physical-condition-in-soccer-players
#4
Maria Reyes Beltran-Valls, Guillermo Camarero-López, José Vicente Beltran-Garrido, Pau Cecilia-Gallego
The aim of this research was to analyze the effects of a two-week step tapering period on lower-limb muscle power, change of direction (COD) and acceleration capacities, and on the stress-recovery state in an amateur soccer team. Twenty-two male players were included in the study. Following a six-week progressive training, the sample was divided into: experimental group (n = 11), who did a two-week period of taper in which training volume was 50% reduced (intensity was kept high) and control group (n = 11), which kept on with the training...
July 12, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28704313/between-game-variation-of-physical-soccer-performance-measures-in-highly-trained-youth-soccer-players
#5
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
#6
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/28702445/effect-of-a-professional-soccer-match-in-skin-temperature-of-the-lower-limbs-a-case-study
#7
Alex de Andrade Fernandes, Eduardo Mendonça Pimenta, Danilo Gomes Moreira, Manuel Sillero-Quintana, João Carlos Bouzas Marins, Rodrigo Figueiredo Morandi, Tane Kanope, Emerson Silami Garcia
The purpose of this study is to analyze the relationship between lower limbs skin temperature (Tsk) recorded by infrared thermography and creatine kinase (CK) response following an official soccer game. A professional soccer player, from the first division Brazilian League, defender, 27 years and 183 cm of height was analyzed. Measures of Tsk with a thermal camera and blood CK concentrations were obtained 24 hr before (24H-PRE), 24 (24H-POST) and 48 hr (48H-POST) after an official match. The results showed that CK values were 193 U/L 24 hr before, rising to 1,083 U/L 24 hr after the game and 414 U/L 48 hr after the game...
June 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28700511/quantifying-changes-in-squat-jump-height-across-a-season-of-men-s-collegiate-soccer
#8
Matt L Sams, Kimitake Sato, Brad H DeWeese, Adam L Sayers, Michael H Stone
The purposes of this study were to examine the effectiveness of an athlete monitoring program in managing athlete neuromuscular fatigue across a men's collegiate soccer season as measured by changes in squat jump (SJ) height and to compare possible changes with session rating of perceived exertion (sRPE) training load (TL). Eighteen outfield Division I men's college soccer players performed SJ testing prior to each game of the fall season in addition to a baseline measurement at the start of pre-season. The athletes provided sRPE values after all training sessions, weight training, and games...
July 8, 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
#9
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/28678768/effects-of-lower-limb-strength-training-on-agility-repeated-sprinting-with-changes-of-direction-leg-peak-power-and-neuromuscular-adaptations-of-soccer-players
#10
Mehréz Hammami, Yassine Negra, François Billaut, Souhail Hermassi, Roy J Shephard, Mohamed Souhaiel Chelly
We examined the effects on explosive muscular performance of incorporating 8 weeks strength training into the preparation of junior male soccer players, allocating subjects between an experimental group (E, n=19) and a matched control group (C, n=12). Controls maintained their regular training program, but the experimental group replaced a part of this schedule by strength training. Performance was assessed using running times (5m, 10m, 20m, 30 and 40m), a sprint test with 180° turns (S180°), a 9-3-6-3-9 m sprint with backward and forward running (SBF), a 4 x 5 m sprint test with turns, repeated shuttle sprinting, repeated changes of direction, squat (SJ) and counter-movement (CMJ) jumping, back half-squatting, and a force-velocity test...
January 24, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28674601/physiological-characteristics-of-projected-starters-and-non-starters-in-the-field-positions-from-a-division-i-women-s-soccer-team
#11
Fabrice G Risso, Farzad Jalilvand, Ashley J Orjalo, Matthew R Moreno, Deshaun L Davis, Samantha A Birmingham-Babauta, John J Stokes, Alyssa A Stage, Tricia M Liu, Dominic V Giuliano, Adrina Lazar, Robert G Lockie
NCAA soccer features different substitution rules compared to FIFA-sanctioned matches, with a greater availability of players who can enter the game. This could influence the physiological characteristics of the field position starters (ST) and non-starters (NST) within a collegiate women's team, which has not been previously analyzed. Thus, 22 field players from the same Division I women's soccer squad completed: vertical and standing broad jumps; 30-meter (m) sprint (0-5, 0-10, 0-30 m intervals); pro-agility and 60-yard shuttle; and the Yo-Yo Intermittent Recovery Test Level 1...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28671146/repetitive-dynamic-stereo-test-improved-processing-time-in-young-athletes
#12
Micha Daniel Schoemann, Matthias Lochmann, Jan Paulus, Georg Michelson
BACKGROUND: Current studies revealed the importance of perceptual training for the treatment of amblyopia. To improve stereo vision on a higher level, visual tasks have to be completed within a limited time window like in repetitive visual function tests. "Processing time" as the reaction time in which the absence or presence of depth was identified correctly, is of better predictive value for perceiving the depth than the stereo threshold only. OBJECTIVE: To examine the long-term effects of repetitive dynamic testing of stereopsis on processing time...
June 30, 2017: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/28668619/internal-training-load-and-its-longitudinal-relationship-with-seasonal-player-wellness-in-elite-professional-soccer
#13
Filipe Manuel Clemente, Bruno Mendes, Pantelis Theodoros Nikolaidis, Francisco Calvete, Sandro Carriço, Adam Lee Owen
Monitoring internal training load has been extensively used and described within team sport environments, however when compared to internal physiological measures such as heart rate (HR) and rating of perceived exertion (RPE), the literature is sparse. The primary aim of this investigation study was to assess differences of playing position on ITL, session-RPE and wellness across two different training microcycles (1 vs. 2 competitive games), in addition with examining the relationship between ITL and Hooper's Index across an entire season...
June 28, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28661786/impact-of-a-soccer-game-on-cardiac-biomarkers-in-adolescent-players
#14
Seyed Mohsen Hosseini, Mojtaba Azizi, Ali Samadi, Nahid Talebi, Gatterer Hannes, Martin Burtscher
PURPOSE: Biochemical markers such as cardiac troponin I (cTnI) and N-terminal pro B-type natriuretic peptide (NT-proBNP) have become indispensable tools for the diagnosis of myocardial injury, providing highly sensitive and specific information about cardiac cell damage and wall stress. The purpose of the present research was to examine the response of cardiac biomarkers to a soccer game in adolescent male soccer players. METHODS: 22 trained adolescent male soccer players (14-16 years) were selected in a purposive manner...
June 29, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28658088/laboratory-and-match-physiological-data-from-an-elite-male-collegiate-soccer-athlete
#15
Ryan M Sapp, Logan Aronhalt, Rian Q Landers-Ramos, Espen E Spangenburg, Min Qi Wang, James M Hagberg
This study compared physiological data from an elite collegiate soccer player to that of his teammates over two seasons. The player of special interest (Player A) was the winner of the MAC Hermann trophy and was therefore considered the top player in NCAA division I soccer for each of the two seasons in which data was collected. Maximal oxygen consumption (VO2max) was measured during preseasons and heart rate was recorded during competitive matches. Polar training loads (PTL) were calculated by the Polar Team2 Pro (Polar USA) system based on time spent in HR zones...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28658071/a-review-of-field-based-assessments-of-neuromuscular-control-and-their-utility-in-male-youth-soccer-players
#16
Paul J Read, Jon L Oliver, Mark B A De Ste Croix, Gregory D Myer, Rhodri S Lloyd
Lower extremity injuries in male youth soccer are common and equate to a substantial time-loss from training and competitions during the course of a season. Extended periods of absence will impact player involvement in skill and physical development activities, as well as participation in competitive match play. Neuromuscular risk factors for lower extremity injury in male youth soccer players can be categorized into quadriceps dominance; leg dominance; ligament dominance; trunk dominance and reduced dynamic stability...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28657805/daily-distribution-of-macronutrient-intakes-of-professional-soccer-players-from-the-english-premier-league
#17
Liam Anderson, Robert J Naughton, Graeme L Close, Rocco Di Michele, Ryland Morgans, Barry Drust, James P Morton
The daily distribution of macronutrient intake can modulate aspects of training adaptations, performance and recovery. We therefore assessed the daily distribution of macronutrient intake (as assessed using food diaries supported by the remote food photographic method and 24 h recalls) of professional soccer players (n=6) of the English Premier League during a 7-day period consisting of two match days and five training days. On match days, average carbohydrate (CHO) content of the pre-match (<1.5 g.kg(-1) body mass) and post-match (1 g...
June 28, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28656783/oxidative-stress-and-antioxidant-biomarker-responses-after-a-moderate-intensity-soccer-training-session
#18
Rodrigo Mello, Ricardo Mello, Diego Gomes, Gabriel Andrade Paz, Igor Nasser, Humberto Miranda, Verônica P Salerno
The present study investigated the effects of a moderate-intensity soccer training session on the production of reactive oxygen species (ROS) and the antioxidant capacity in athletes along with the biomarkers creatine kinase and transaminases for lesions in muscle and liver cells. Twenty-two male soccer players participated in this study. Blood samples were collected 5 min before and after a moderate-intensity game simulation. The results showed a decrease in the concentration of reduced glutathione (GSH) from an elevation in the production of ROS that maintained the redox homeostasis...
June 28, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/28654095/polygenic-risk-has-an-impact-on-the-structural-plasticity-of-hippocampal-subfields-during-aerobic-exercise-combined-with-cognitive-remediation-in-multi-episode-schizophrenia
#19
S Papiol, D Popovic, D Keeser, A Hasan, T Schneider-Axmann, F Degenhardt, M J Rossner, H Bickeböller, A Schmitt, P Falkai, B Malchow
Preliminary studies suggest that, besides improving cognition, aerobic exercise might increase hippocampal volume in schizophrenia patients; however, results are not consistent. Individual mechanisms of volume changes are unknown but might be connected to the load of risk genes. Genome-wide association studies have uncovered the polygenic architecture of schizophrenia. The secondary analysis presented here aimed to determine the modulatory role of schizophrenia polygenic risk scores (PRSs) on volume changes in the total hippocampus and cornu ammonis (CA) 1, CA2/3, CA4/dentate gyrus (DG) and subiculum over time...
June 27, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28651660/sudden-improvement-in-ventricular-repolarization-abnormality-after-a-short-detraining-period-in-an-athlete
#20
Noriko Motoki, Yohei Akazawa, Akira Hachiya, Yuji Inaba
We describe the case of a 17-year-old male soccer player with T-wave inversion in precordial leads in resting electrocardiography, which also disclosed sinus bradycardia, early repolarization, and increased QRS voltage. These findings strongly suggested cardiomyopathy. The patient's T-wave inversion disappeared during only 2 weeks of detraining, and it re-appeared 2 weeks after resumption of intensive training. This sudden change in electrocardiographic parameters over a short period helped in identifying the adolescent as having athlete's heart...
June 27, 2017: Cardiology in the Young
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