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https://www.readbyqxmd.com/read/28931173/hopping-and-landing-performance-in-male-youth-soccer-players-effects-of-age-and-maturation
#1
Paul James Read, Jon L Oliver, Gregory Myer, Mark De Ste Croix, Rhodri Lloyd
Quantifying hopping and landing performances can assist coaches in identifying young male soccer players who may be at increased risk of injury. The influence of chronological age and maturation on these measures in this population is unknown. Single leg hop for distance (SLHD) and 75% horizontal hop and stick landing force (75%Hop) were examined in a cross-sectional sample (N=400) of elite male youth soccer players. Between-group differences for both chronological age (U11-U18) and stage of maturation (pre-, circa- or post-peak height velocity (PHV)) were analyzed...
September 20, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28930876/case-study-sleep-and-injury-in-elite-soccer-a-mixed-method-approach
#2
Mathieu Nédélec, Cédric Leduc, Brian Dawson, Gaël Guilhem, Grégory Dupont
The present case study allowed an examination of the link between sleep and injury occurrence in an elite male soccer player competing in French League 1 and Union of European Football Associations matches. During 4 months, a mixed method approach was used, combining actigraphic sleep assessment with qualitative interviews on a daily basis. Three injuries were reported over the study period. Sleep onset latency, both in the single night (117±43 min) and in the week (78±50 min) before injury occurrence, was longer than pre-season baseline values (18±13 min; effect size (ES): 3...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28929343/a-comparison-of-isomaltulose-versus-maltodextrin-ingestion-during-soccer-specific-exercise
#3
Emma J Stevenson, Anthony Watson, Stephan Theis, Anja Holz, Liam D Harper, Mark Russell
PURPOSE: The performance and physiological effects of isomaltulose and maltodextrin consumed intermittently during prolonged soccer-specific exercise were investigated. METHODS: University soccer players (n = 22) performed 120 min of intermittent exercise while consuming 8% carbohydrate-electrolyte drinks (equivalent to ~ 20 g h(-1)) containing maltodextrin (Glycaemic Index: 90-100), isomaltulose (Glycaemic Index: 32) or a carbohydrate-energy-free placebo in a manner replicating the practices of soccer players (i...
September 19, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28927725/sex-differences-in-sport-related-concussion-long-term-outcomes
#4
Tracey Covassin, Jennifer Savage, Abby Bretzin, Meghan Lafevor
Approximately 1.6 to 3.8 million recreational and sports-related concussions (SRC) occur each year in the Unites States. Research suggest that female athletes are at a greater risk for a SRC compared to male athletes competing in comparable sports (i.e., soccer, basketball). Moreover, female athletes have reported more total symptoms and greater neurocognitive impairments following a SRC. Female athletes have been found to report greater symptom provocation as measured by the Vestibular/Ocular Motor Screening (VOMS), and increased brain activation compared to males...
September 16, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28926593/target-directed-motor-imagery-of-the-lower-limb-enhances-event-related-desynchronization
#5
Kosuke Kitahara, Yoshikatsu Hayashi, Shiro Yano, Toshiyuki Kondo
Event-related desynchronization/synchronization (ERD/S) is an electroencephalogram (EEG) feature widely used as control signals for Brain-Computer Interfaces (BCIs). Nevertheless, the underlying neural mechanisms and functions of ERD/S are largely unknown, thus investigating them is crucial to improve the reliability of ERD/S-based BCIs. This study aimed to identify Motor Imagery (MI) conditions that enhance ERD/S. We investigated following three questions: 1) whether target-directed MI affects ERD/S, 2) whether MI with sound imagery affects ERD/S, and 3) whether ERD/S has a body part dependency of MI...
2017: PloS One
https://www.readbyqxmd.com/read/28922682/the-energy-cost-of-running-with-the-ball-in-soccer
#6
Alessandro Piras, Milena Raffi, Charalampos Atmatzidis, Franco Merni, Rocco Di Michele
Running with the ball is a soccer-specific activity frequently used by players during match play and training drills. Nevertheless, the energy cost (EC) of on-grass running with the ball has not yet been determined. The purpose of this study was therefore to assess the EC of constant-speed running with the ball, and to compare it with the EC of normal running. Eight amateur soccer players performed two 6- min runs at 10 km/h on artificial turf, respectively with and without the ball. EC was measured with indirect calorimetry and, furthermore, estimated with a method based on players' accelerations measured with a GPS receiver...
September 18, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28922490/risk-factors-for-football-injuries-in-young-players-aged-7-to-12-years
#7
Roland Rössler, Astrid Junge, Jiri Chomiak, Karel Němec, Jiri Dvorak, Eric Lichtenstein, Oliver Faude
OBJECTIVES: Football (soccer) is very popular amongst children. Little is known about risk factors for football injuries in children. The aim was to analyse potential injury risk factors in 7 to 12 year old players. DESIGN: Prospective epidemiological study. METHODS: We collected prospective data in Switzerland and the Czech Republic over two seasons. Coaches reported exposure of players (in hours), absence, and injury data via an internet-based registration system...
September 18, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28919844/practical-nutritional-recovery-strategies-for-elite-soccer-players-when-limited-time-separates-repeated-matches
#8
REVIEW
Mayur Krachna Ranchordas, Joel T Dawson, Mark Russell
Specific guidelines that aim to facilitate the recovery of soccer players from the demands of training and a congested fixture schedule are lacking; especially in relation to evidence-based nutritional recommendations. The importance of repeated high level performance and injury avoidance while addressing the challenges of fixture scheduling, travel to away venues, and training commitments requires a strategic and practically feasible method of implementing specific nutritional strategies. Here we present evidence-based guidelines regarding nutritional recovery strategies within the context of soccer...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28918391/genetic-polymorphisms-associated-with-the-risk-of-concussion-in-1056-college-athletes-a-multicentre-prospective-cohort-study
#9
Thomas Roland Terrell, Ruth Abramson, Jeffery T Barth, Ellen Bennett, Robert C Cantu, Richard Sloane, Daniel T Laskowitz, David M Erlanger, Douglas McKeag, Gregory Nichols, Verle Valentine, Leslie Galloway
BACKGROUND/AIM: To evaluate the association of genetic polymorphisms APOE, APOE G-219T promoter, microtubule associated protein(MAPT)/tau exon 6 Ser(53)Pro, MAPT/tau Hist(47)Tyr, IL-6572 G/C and IL-6R(Asp)358(Ala) with the risk of concussion in college athletes. METHODS: A 23-centre prospective cohort study of 1056 college athletes with genotyping was completed between August 2003 and December 2012. All athletes completed baseline medical and concussion questionnaires, and post-concussion data were collected for athletes with a documented concussion...
September 16, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28915993/marching-to-a-different-drummer-a-cross-cultural-comparison-of-young-adolescents-who-challenge-gender-norms
#10
Chunyan Yu, Xiayun Zuo, Robert W Blum, Deborah L Tolman, Anna Kågesten, Kristin Mmari, Sara De Meyer, Kristien Michielsen, Sharmistha Basu, Rajib Acharya, Qiguo Lian, Chaohua Lou
PURPOSE: Little is known about how gender norms regulate adolescents' lives across different cultural settings. This study aims to illustrate what is considered as violating gender norms for boys and girls in four urban poor sites as well as the consequences that follow the challenging of gender norms. METHODS: Data were collected as part of the Global Early Adolescent Study, a 15-country collaboration to explore gender norms and health in early adolescence. The current study analyzed narrative and in-depth interviews conducted in urban poor sites in two middle-income (Shanghai, China; and New Delhi, India) and two high-income countries (Baltimore, U...
October 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28915093/sport-skill-specific-expertise-biases-sensory-integration-for-spatial-referencing-and-postural-control
#11
Michalis Thalassinos, Giorgos Fotiadis, Fotini Arabatzi, Brice Isableu, Vassilia Hatzitaki
The authors asked how sport expertise modulates visual field dependence and sensory reweighting for controlling posture. Experienced soccer athletes, ballet dancers, and nonathletes performed (a) a Rod and Frame test and (b) a 100-s bipedal stance task during which vision and proprioception were successively or concurrently disrupted in 20-s blocks. Postural adaptation was assessed in the mean center of pressure displacement, root mean square of center of pressure velocity and ankle muscles integrated electromyography activity...
September 15, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28912743/act-on-numbers-numerical-magnitude-influences-selection-and-kinematics-of-finger-movement
#12
Rosa Rugani, Sonia Betti, Francesco Ceccarini, Luisa Sartori
In the past decade hand kinematics has been reliably adopted for investigating cognitive processes and disentangling debated topics. One of the most controversial issues in numerical cognition literature regards the origin - cultural vs. genetically driven - of the mental number line (MNL), oriented from left (small numbers) to right (large numbers). To date, the majority of studies have investigated this effect by means of response times, whereas studies considering more culturally unbiased measures such as kinematic parameters are rare...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28904982/preseason-aerobic-fitness-predicts-in-season-injury-and-illness-in-female-youth-athletes
#13
Andrew Watson, Stacey Brickson, M Alison Brooks, Warren Dunn
BACKGROUND: Although preseason aerobic fitness has been suggested as a modifiable risk factor for injury in adult athletes, the relationship between aerobic fitness, injury, and illness in youth athletes is unknown. PURPOSE: To determine whether preseason aerobic fitness predicts in-season injury and illness risk in female adolescent soccer players. STUDY DESIGN: Case-control study; Level of evidence, 3. METHODS: Fifty-four female adolescent soccer players underwent preseason evaluation to determine years of experience, body mass index (BMI), maximal aerobic capacity (VO2max), and time to exhaustion (Tmax) during cycle ergometer testing...
September 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28904935/evaluation-of-dietary-intakes-body-composition-and-cardiometabolic-parameters-in-adolescent-team-sports-elite-athletes-a-cross-sectional-study
#14
Javad Hosseinzadeh, Zahra Maghsoudi, Behnood Abbasi, Pooya Daneshvar, Atefeh Hojjati, Reza Ghiasvand
BACKGROUND: Nutritional intake is an important issue in adolescent athletes. Proper athletes' performance is a multifactorial outcome of good training, body composition, and nutritional status. The aim of the present study was to assess nutritional status, body composition, and cardiometabolic factors in adolescent elite athlete's province of Isfahan, Iran. MATERIALS AND METHODS: In this cross-sectional study, 100 adolescent elite athletes from volleyball, basketball, and soccer teams were selected for the study...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28902114/effects-of-repeated-sprints-with-changes-of-direction-on-youth-soccer-player-s-performance-impact-of-initial-fitness-level
#15
Fábio Y Nakamura, Javier Sanchez-Sanchez, Rodrigo Ramirez-Campillo, Cristina Petisco, Oliver Gonzalo-Skok, Alejandro Rodriguez-Fernandez, Javier Miñano
The aim of this study was to assess the effect of an 8-week repeated sprint with change of direction training program on repeated sprint, intermittent endurance and change of direction performance in youth soccer players with different aerobic fitness levels. Athletes were randomly assigned into a soccer-only (n=9; age, 14.9±0.4 yr) and soccer plus repeated sprint with change of direction (RS-COD) training programs for players with high (n=10; age, 14.4±0.5 yr) and low (n=10; age, 14.4±0.5 yr) aerobic fitness...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28895469/trends-in-aggressive-play-and-refereeing-among-the-top-five-european-soccer-leagues
#16
Ryan M Sapp, Espen E Spangenburg, James M Hagberg
Current trends suggest professional soccer is becoming less aggressive, with England often argued to have the most aggressive of the top European leagues. The purpose of this study was to investigate differences in fouls and cards as indicators of aggressive play in the first divisions of England, France, Germany, Italy, and Spain over the past decade. Number of fouls per match and per yellow card has decreased in all leagues since 2007/08, though attempted tackles per foul has not changed or has increased...
September 12, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28894427/hypernetworks-reveal-compound-variables-that-capture-cooperative-and-competitive-interactions-in-a-soccer-match
#17
João Ramos, Rui J Lopes, Pedro Marques, Duarte Araújo
The combination of sports sciences theorization and social networks analysis (SNA) has offered useful new insights for addressing team behavior. However, SNA typically represents the dynamics of team behavior during a match in dyadic interactions and in a single cumulative snapshot. This study aims to overcome these limitations by using hypernetworks to describe illustrative cases of team behavior dynamics at various other levels of analyses. Hypernetworks simultaneously access cooperative and competitive interactions between teammates and opponents across space and time during a match...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28889899/pulmonary-nodules-in-an-adolescent-female-presented-with-abdominal-pain-fatigue-and-weight-loss
#18
Britta K Sundquist, Paul G Comber, Scott H Beegle
A 14-year-old girl initially presented to a pediatric gastroenterology office with a 1-month history of right upper quadrant abdominal pain, which radiated to the right shoulder and back. Her pain was worse after heavy meals and with deep breaths. She reported anorexia, fatigue, dyspnea while playing soccer, and a 5-pound weight loss. She denied any fevers, cough, or changes in her bowel habits.
September 2017: Chest
https://www.readbyqxmd.com/read/28886966/monitoring-training-load-and-fatigue-in-soccer-players-with-physiological-markers
#19
REVIEW
Léo Djaoui, Monoem Haddad, Karim Chamari, Alexandre Dellal
The quantification and monitoring of training load (TL) has been the topic of many scientific works in the last fifteen years. TL monitoring helps coaches to individually prescribe, follow-up, analyse, adjust and programme training sessions. In particular, the aim of the present review was to provide a critical literature report regarding different physiological markers of TL monitoring, particularly in soccer, as the load is specific to individual sports. Therefore, the interests and limitations of heart rate (HR), HR variability (HRV) and biochemical variables (blood, urinary and hormonal variations) were analysed, with a special focus on daily measures (before, during and after training) and monitoring throughout a whole season...
September 5, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28886548/investigating-the-impact-of-different-sport-trainings-on-particulate-matter-resuspension-in-a-sport-center-using-well-characterized-reference-instruments-and-a-low-cost-monitor
#20
Mehdi Amouei Torkmahalleh, Karakat Kabay, Meruyet Bazhanova, Obaidullah Mohiuddin, Madina Obaidullah, Soudabeh Gorjinezhad
The present study investigated the exposure of teenagers, adults, and students to PM1, PM2.5, PM4, PM10, particle number concentration at two sport facilities of Nazarbayev University including Gymnastics Hall and Multi-purpose Hall. Measurements were conducted during variety of sport training sessions including soccer, basketball, volleyball, Mixed Martial Arts (MMA), boxing, table tennis, etc. A low-cost instrument, Dylos was employed to compare its performance against two TSI instruments. In overall, the Dylos showed acceptable peaks when the source of particle resuspension was present...
September 5, 2017: Science of the Total Environment
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