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https://www.readbyqxmd.com/read/28919844/practical-nutritional-recovery-strategies-for-elite-soccer-players-when-limited-time-separates-repeated-matches
#1
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/28915772/hypermobility-in-adolescent-athletes-pain-functional-ability-quality-of-life-and-musculoskeletal-injuries
#2
Heidi Schmidt, Trine Lykke Pedersen, Tina Junge, Raoul Engelbert, Birgit Juul-Kristensen
Study Design Cross-sectional. Background Generalised joint hypermobility (GJH) may increase pain and likelihood of injuries and also decrease function and health-related quality of life (HRQoL) in elite level adolescent athletes. Objectives To assess the prevalence of GJH in elite level adolescent athletes, and to study the association of GJH with pain, function, HRQoL, and musculoskeletal injuries. Methods A total of 132 elite level adolescent athletes (36 males; 96 females), mean (SD) age 14.0 (0.9) years, participated (n=22 ballet dancers, n=57 teamgym gymnasts, n=53 team handball players)...
September 15, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28912649/does-live-high-train-low-and-high-hypoxic-training-alter-running-mechanics-in-elite-team-sport-players
#3
Olivier Girard, Grégoire P Millet, Jean-Benoit Morin, Franck Brocherie
This study aimed to investigate if "Live High-Train Low (and High)" hypoxic training alters constant-velocity running mechanics. While residing under normobaric hypoxia (≥14 h·d(-1); FiO2 14.5-14.2%) for 14 days, twenty field hockey players performed, in addition to their usual training in normoxia, six sessions (4 × 5 × 5-s maximal sprints; 25 s passive recovery; 5 min rest) under either normobaric hypoxia (FiO2 ~14.5%, n = 9) or normoxia (FiO2 20.9%, n = 11). Before and immediately after the intervention, their running pattern was assessed at 10 and 15 km·h(-1) as well as during six 30-s runs at ~20 km·h(-1) with 30-s passive recovery on an instrumented motorised treadmill...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28910543/intra-individual-variability-in-the-sleep-of-senior-and-junior-rugby-league-athletes-during-the-competitive-season
#4
Johnpaul Caia, Shona L Halson, Tannath J Scott, Vincent G Kelly
This study examined the sleep intra-individual variability (IIV) of rugby league athletes across senior and junior levels during one week of the competitive season. Forty-five rugby league athletes across elite senior, sub-elite senior and elite junior levels each wore actigraphy monitors for seven days during the competitive season, and completed a subjective sleep diary each morning upon waking. Linear mixed models were used to assess differences in sleep measures between playing levels. Intra-individual standard deviations for each sleep measure were calculated for each athlete to determine their respective IIV, allowing differences in IIV between groups to be assessed...
September 14, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28902753/nonoperative-management-and-novel-imaging-for-posterior-circumflex-humeral-artery-injury-in-volleyball
#5
Daan van de Pol, R Nils Planken, Aart Terpstra, Marja Pannekoek-Hekman, P Paul F M Kuijer, Mario Maas
We report on a 34-yr-old male elite volleyball player with symptomatic emboli in the spiking hand from a partially thrombosed aneurysm of the posterior circumflex humeral artery (PCHA) in his dominant shoulder. At initial diagnosis and follow-up, a combination of time-resolved and high-resolution steady state contrast-enhanced magnetic resonance angiography (CE-MRA) enabled detailed visualization of: (1) emboli that were not detectable by vascular ultrasound; and (2) the PCHA aneurysm, including compression during abduction and external rotation (ABER provocation)...
September 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/28902113/comparative-effects-of-two-interval-shuttle-run-training-modes-on-physiological-and-performance-adaptations-in-female-professional-futsal-players
#6
Anderson S Teixeira, Francimara B Arins, Ricardo D De Lucas, Lorival J Carminatti, Naiandra Dittrich, Fábio Yuzo Nakamura, Luiz Guilherme A Guglielmo
The purpose of the present study was to analyze the effects of two shuttle-run interval training (SRIT) models with one and three directional changes per running bout on the aerobic and anaerobic performances of elite female futsal players. Sixteen players competing in the Brazilian National Division League took part in the study. The training protocols consisted of shuttle-run intervals organized in four sets of 4-min bouts with 3- min of rest intervals between the sets. The SRIT models were composed of one (7...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28895619/symptoms-of-common-mental-disorders-in-professional-rugby-an-international-observational-descriptive-study
#7
Vincent Gouttebarge, Phil Hopley, Gino Kerkhoffs, Evert Verhagen, Wayne Viljoen, Paul Wylleman, Mike I Lambert
The aim of the study was to determine the prevalence of symptoms of common mental disorders among professional rugby players across countries. A cross-sectional analysis of the baseline questionnaires from an ongoing prospective cohort study was conducted. Nine national players' associations and three rugby unions distributed questionnaires based on validated scales for assessing symptoms of common mental disorders. Among the whole study sample (N=990; overall response rate of 28%), prevalence (4-week) of symptoms of common mental disorders ranged from 15% for adverse alcohol use to 30% for anxiety/depression...
September 11, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28895469/trends-in-aggressive-play-and-refereeing-among-the-top-five-european-soccer-leagues
#8
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/28894758/the-latarjet-procedure-at-the-national-football-league-scouting-combine-an-imaging-and-performance-analysis
#9
George F LeBus, Jorge Chahla, George Sanchez, Ramesses Akamefula, Gilbert Moatshe, Alexandra Phocas, Mark D Price, James M Whalen, Robert F LaPrade, Matthew T Provencher
BACKGROUND: The Latarjet procedure is commonly performed in the setting of glenoid bone loss for treatment of recurrent anterior shoulder instability; however, little is known regarding the outcomes of this procedure in elite American football players. PURPOSE: (1) Determine the prevalence, clinical features, and imaging findings of elite college football athletes who present to the National Football League (NFL) Combine with a previous Latarjet procedure and (2) describe these athletes' performance in the NFL in terms of draft status and initial playing time...
September 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28888470/functional-and-biochemical-adaptations-of-elite-level-futsal-players-from-brazil-along-a-training-season
#10
Rômulo Pillon Barcelos, Guilherme Lopes Tocchetto, Frederico Diniz Lima, Sílvio Terra Stefanello, Harrison Fabricio Muzzy Rodrigues, Manuela Borges Sangoi, Rafael Noal Moresco, Luiz Fernando Freire Royes, Félix Alexandre Antunes Soares, Guilherme Bresciani
BACKGROUND AND OBJECTIVE: Although hard training is mandatory in elite level futsal training, few studies have proposed a biochemical follow up in futsal players during a whole season. Therefore, the aim of this study was to compare functional and biochemical markers in Brazilian elite level futsal players throughout a competition season. MATERIALS AND METHODS: Eight players aged 25.5±5.4 years were evaluated at three time points: preseason (T1), immediately before the FIFA(®)-Intercontinental-Futsal-Cup (T2), and at the end of the season (T3), with a tapering period of 1 week before T2...
August 26, 2017: Medicina
https://www.readbyqxmd.com/read/28885388/differences-in-physical-capacity-between-junior-and-senior-australian-footballers
#11
Stephen J Kelly, Mark L Watsford, Damien Austin, Rob W Spurrs, Matthew J Pine, Michael J Rennie
The purpose of this study was to profile and compare anthropometric and physical capacities within elite junior and senior Australian football (AF) players of various chronological ages and stages of athletic development. Seventy-nine players, including junior and senior AF players from one professional club were profiled using eleven assessments. Junior players were divided into two groups based on chronological age (under 16 and 18 years) and senior players according to years since drafted to a professional AF team (1-2 years, 3-7 years and 8+ years)...
September 5, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28880783/competitive-balance-trends-in-elite-table-tennis-the-olympic-games-and-world-championships-1988-2016
#12
Jinming Zheng, Taeyeon Oh, Seungmo Kim, Geoff Dickson, Veerle De Bosscher
Competitive balance is important because it enhances outcome uncertainty and therefore it promotes spectator interest, and encourages government investment in a sport. This article analyses the distribution of gold medals, medals, medal points and top eight points amongst nations in table tennis from 1988 to 2016 at the Olympic Games and the World Championships respectively. A normalised version of the Herfindahl-Hirschman Index and a coefficient of variation are calculated for each nation's share of these performance indicators...
September 7, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28873025/analysis-of-head-impacts-during-sub-elite-hurling-practice-sessions
#13
D O'Sullivan, M Roe, C Blake
The reported incidence of head and neck injuries in hurling is 0.12 per 1000 hours, but no previous research has quantified head impact characteristics in this sport. Here, a wireless accelerometer and gyroscope captured head impacts, in 20 senior club level hurling players. Peak linear and rotational acceleration and impact location were recorded during three hurling training sessions, each player participating once. A mean of 27.9 impacts (linear acceleration >10g) per player, per session were recorded; 1314 impacts during a total exposure time of 247 minutes...
September 5, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28872423/the-use-of-relative-speed-zones-in-australian-football-are-we-really-measuring-what-we-think-we-are
#14
Nick B Murray, Tim J Gabbett, Andrew D Townshend
OBJECTIVES: This study aimed to examine the difference between absolute and relative workloads, injury likelihood, and the acute:chronic workload ratio (ACWR) in elite Australian football. DESIGN: Single cohort, observational study. METHODS: Forty-five elite Australian football players from one club participated in this study. Running workloads of players were tracked using Global Positioning System technology, and were categorised using either; (1) absolute, pre-defined speed thresholds, or (2) relative, individualised speed thresholds...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872422/bone-turnover-markers-and-lean-mass-in-pubescent-boys-comparison-between-elite-soccer-players-and-controls
#15
Ammar Nebigh, Mohamed Elfethi Abed, Rihab Borji, Sonia Sahli, Slaheddine Sellami, Zouhair Tabka, Haithem Rebai
The aim of this study was to examine the relationship between bone mass and bone turnover markers with lean mass in pubescent soccer players. Two groups participated in this study 65 elite young soccer players that trained from 6 to 8 hours per week and 60 controls. Bone mineral density (BMD), bone mineral content (BMC) in the whole body, lower limbs, lumbar spine, and femoral neck, biochemical markers of osteocalcin (OC), bone-specific alkaline phosphatase (BAP), C-telopeptide type I collagen (CTX) and total lean mass were assessed...
September 5, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28872372/the-specificity-of-rugby-union-training-sessions-in-preparation-for-match-demands
#16
Patrick G Campbell, Jonathan M Peake, Geoffrey M Minett
PURPOSE: Investigations into the specificity of rugby union training practices in preparation for competitive demands has predominantly focussed on physical and physiological demands. The evaluation of the contextual variance in perceptual strain or skill requirements between training and matches in rugby union is unclear, yet holistic understanding may assist to optimise training design. This study evaluated the specificity of physical, physiological, perceptual and skill demands of training sessions compared with competitive match-play in pre-professional, elite club rugby union...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872370/neuromuscular-responses-to-conditioned-soccer-sessions-assessed-via-gps-embedded-accelerometers-insights-into-tactical-periodization
#17
Martin Buchheit, Mathieu Lacome, Yannick Cholley, Ben M Simpson
PURPOSE: To 1) examine the reliability of field-based running-specific measures of neuromuscular function assessed via GPS-embedded accelerometers and 2) examine their responses to three typical conditioned sessions (i.e., Strength, Endurance and Speed) in elite soccer players. METHODS: Before and immediately after each session, vertical jump (CMJ) and adductors squeeze strength (Groin) performances were recorded. Players also performed a 4-min run at 12 km/h followed by 4 ~60-m runs (run =12 s, r =33 s)...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872368/cryotherapy-re-invented-application-of-phase-change-material-for-recovery-in-elite-soccer
#18
Tom Clifford, Will Abbott, Susan Y Kwiecien, Glyn Howatson, Malachy P McHugh
PURPOSE: This study examined whether donning lower body garments fitted with cooled phase change material (PCM) would enhance recovery after a soccer match. METHODS: In a randomized, crossover design, eleven elite-soccer players from the reserve squad of a team in the 2nd highest league in England wore PCM cooled to 15°C (PCMcold) or left at ambient temperature (PCMamb; sham control) for 3 h after a soccer match. To assess recovery, countermovement jump (CMJ) height, maximal isometric voluntary contraction (MIVC), muscle soreness (MS), and the adapted Brief Assessment of Mood Questionnaire (BAM+) were measured before, 12, 36 and 60 h after each match...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28866111/does-player-unavailability-affect-football-teams-match-physical-outputs-a-two-season-study-of-the-uefa-champions-league
#19
Johann Windt, Jan Ekstrand, Karim M Khan, Alan McCall, Bruno D Zumbo
OBJECTIVES: Player unavailability negatively affects team performance in elite football. However, whether player unavailability and its concomitant performance decrement is mediated by any changes in teams' match physical outputs is unknown. We examined whether the number of players injured (i.e. unavailable for match selection) was associated with any changes in teams' physical outputs. DESIGN: Prospective cohort study. METHODS: Between-team variation was calculated by correlating average team availability with average physical outputs...
August 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28858059/the-relationship-between-repeated-kicking-performance-and-maximal-aerobic-capacity-in-elite-junior-australian-football
#20
Jacob Joseph, Carl Woods, Christopher Joyce
Australian football (AF) is a physically demanding game, requiring players to engage in a range of anaerobic activities interspersed with prolonged aerobic exercise. Coupled, players have to perform a range of technical skills, the most fundamental of which being to effectively kick (dispose) the ball. The aim of this study was to ascertain the extent to which aerobic capacity influenced kicking performance in AF. Twenty four elite U18 players competing in the same U18 competition performed the Australian Football Kicking test (AFK) three times with the yo-yo IR2 completed twice (between each AFK), with no rest between all three AFKs...
August 26, 2017: Journal of Strength and Conditioning Research
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