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https://www.readbyqxmd.com/read/28717627/the-influence-of-playing-surface-on-injury-risk-in-italian-elite-rugby-players
#1
Riccardo Maria Lanzetti, Domenico Lupariello, Teresa Venditto, Pierpaolo Rota, Matteo Guzzini, Antonio Vadalà, Attilio Rota, Andrea Ferretti
BACKGROUND: There is a growing interest in the use of artificial turf surfaces in rugby. In particular, artificial surfaces may be an useful means of increasing participation in the sport by allowing greater usage of a given pitch, especially in regions where natural turf pitches are difficult to maintain. METHODS: The incidence of site, nature, cause, and severity of training and match injuries was prospectively recorded in two professional teams (one equipped with World Rugby certified third generation artificial turf and the other with natural grass over the 2014-2015 season)...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28716690/does-player-time-in-game-affect-tackle-technique-in-elite-level-rugby-union
#2
Gregory J Tierney, Karl Denvir, Garreth Farrell, Ciaran K Simms
OBJECTIVES: It has been hypothesised that fatigue may be a major factor in tackle-related injury risk in rugby union and hence more injuries occur in the later stages of a game. The aim of this study is to identify changes in ball carrier or tackler proficiency characteristics, using elite level match video data, as player time-in-game increases. DESIGN: Qualitative observational cohort study. METHODS: Three 2014/15 European Rugby Champions Cup games were selected for ball carrier and tackler proficiency analysis...
July 4, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28714774/small-sided-games-in-elite-soccer-does-one-size-fits-all
#3
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/28699924/position-specific-acceleration-and-deceleration-profiles-in-elite-youth-and-senior-soccer-players
#4
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/28697691/the-relationship-between-mechanical-stiffness-and-athletic-performance-markers-in-sub-elite-footballers
#5
Judd T Kalkhoven, Mark L Watsford
This study investigated the relationship between several measures of lower-body stiffness and physical performance variables in 22 sub-elite male football players (mean ± SD; 21.9 ± 1.5 yr; 1.79 ± 0.06 m; 72.2 ± 7.2 kg). The participants were assessed for individual muscle stiffness of the Rectus Femoris (RF), Biceps Femoris (BF) and Medial Gastrocnemius (MG) muscles and vertical stiffness (Kvert) was also assessed assessed running acceleration, maximal sprint speed, agility, vertical jumping and muscular strength...
July 12, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28689823/performance-and-return-to-sport-in-elite-baseball-players-and-recreational-athletes-following-repair-of-the-latissimus-dorsi-and-teres-major
#6
Brandon J Erickson, Peter N Chalmers, Brian R Waterman, Justin W Griffin, Anthony A Romeo
BACKGROUND: Tears of the latissimus dorsi (LD) and teres major (TM) are rare but disabling injuries in the overhead athlete. METHODS: All patients who underwent an LD and/or TM repair between January 1, 2010, and June 6, 2016, with more than 12 months' follow-up were included. Demographic information and postoperative range of motion were recorded. Patients were contacted via phone and answered questions to provide the following: Kerlan-Jobe Orthopaedic Clinic (KJOC) shoulder and elbow outcome score, American Shoulder and Elbow Surgeons (ASES) shoulder score, and visual analog scale (VAS) score...
July 6, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28680894/return-to-play-and-player-performance-after-anterior-cruciate-ligament-injury-in-elite-australian-rules-football-players
#7
Matthew G Liptak, Kevin R Angel
BACKGROUND: Australian Rules football is a highly aerobic and anaerobic game that at times requires players to perform cutting or pivoting maneuvers, potentially exposing them to anterior cruciate ligament (ACL) injury. At present, there are limited data available addressing the impact of ACL injury on return to play and preinjury form after ACL reconstruction. PURPOSE: To determine the prevalence of ACL injury and the incidence of further ACL injury, and to consider player return to play and return to preinjury form after ACL reconstruction...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28673119/biomechanical-differences-of-arm-swing-countermovement-jumps-on-sand-and-rigid-surface-performed-by-elite-beach-volleyball-players
#8
George Giatsis, Vassilios Panoutsakopoulos, Iraklis A Kollias
The purpose of this study was to investigate the possible arm swing effect on the biomechanical parameters of vertical counter movement jump due to differences of the compliance of the take-off surface. Fifteen elite male beach-volleyball players (26.2 ± 5.9 years; 1.87 ± 0.05 m; 83.4 ± 6.0 kg; mean ± standard deviation, respectively) performed counter movement jumps on sand and on a rigid surface with and without an arm swing. Results showed significant (p < .05) surface effects on the jump height, the ankle joint angle at the lowest height of the body center of mass and the ankle angular velocity...
July 4, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28670284/tensiomyographic-markers-are-not-sensitive-for-monitoring-muscle-fatigue-in-elite-youth-athletes-a-pilot-study
#9
Thimo Wiewelhove, Christian Raeder, Rauno Alvaro de Paula Simola, Christoph Schneider, Alexander Döweling, Alexander Ferrauti
Objective: Tensiomyography (TMG) is an indirect measure of a muscle's contractile properties and has the potential as a technique for detecting exercise-induced skeletal muscle fatigue. Therefore, the aim of this study was to assess the sensitivity of tensiomyographic markers to identify reduced muscular performance in elite youth athletes. Methods: Fourteen male junior tennis players (age: 14.9 ± 1.2 years) with an international (International Tennis Federation) ranking position participated in this pre-post single group trial...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28668619/internal-training-load-and-its-longitudinal-relationship-with-seasonal-player-wellness-in-elite-professional-soccer
#10
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/28662531/effects-of-in-season-explosive-strength-training-on-maximal-leg-strength-jumping-sprinting-and%C3%A2-intermittent-aerobic-performance-in-male-handball-athletes
#11
Souhail Hermassi, Mohamed Souhaiel Chelly, Georg Fieseler, Thomas Bartels, Stephan Schulze, Karl-Stefan Delank, Roy J Shephard, René Schwesig
Background Team handball is an intense ball sport with specific requirements on technical skills, tactical understanding, and physical performance. The ability of handball players to develop explosive efforts (e. g. sprinting, jumping, changing direction) is crucial to success. Objective The purpose of this pilot study was to examine the effects of an in-season high-intensity strength training program on the physical performance of elite handball players. Materials and methods Twenty-two handball players (a single national-level Tunisian team) were randomly assigned to a control group (CG; n = 10) or a training group (TG; n = 12)...
June 29, 2017: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/28662123/effects-of-different-re-warm-up-activities-in-football-players-performance
#12
Eduardo Abade, Jaime Sampaio, Bruno Gonçalves, Jorge Baptista, Alberto Alves, João Viana
Warm up routines are commonly used to optimize football performance and prevent injuries. Yet, official pre-match protocols may require players to passively rest for approximately 10 to 15 minutes between the warm up and the beginning of the match. Therefore, the aim of this study was to explore the effect of different re-warm up activities on the physical performance of football players. Twenty-Two Portuguese elite under-19 football players participated in the study conducted during the competitive season...
2017: PloS One
https://www.readbyqxmd.com/read/28661825/concussions-in-community-level-rugby-risk-knowledge-and-attitudes
#13
R Kyle Martin, Travis J Hrubeniuk, Christopher D Witiw, Peter MacDonald, Jeff Leiter
BACKGROUND: Rugby is a popular collision sport where participants are at risk of sustaining concussions. Most research focuses on elite-level or youth divisions. Comparatively, little is known about adult community rugby. The aim of this research was to estimate the risk of sustaining a concussion during participation in community-level rugby and summarize the collective knowledge and attitudes toward concussions. HYPOTHESIS: Concussion symptoms will be reported frequently among community-level rugby players and a substantial proportion will report a willingness to continue participation despite the risk...
July 2017: Sports Health
https://www.readbyqxmd.com/read/28658088/laboratory-and-match-physiological-data-from-an-elite-male-collegiate-soccer-athlete
#14
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/28658081/the-positional-anthropometric-and-performance-profile-of-elite-gaelic-football-players
#15
Aidan Shovlin, Mark Roe, Shane Malone, Kieran Collins
The aim of the current investigation was to evaluate the variation in the anthropometric and performance characteristics of elite Gaelic football players with respect of position. One hundred and forty-eight elite Gaelic footballers underwent anthropometric (height, body mass, sum of seven skinfolds, % adipose tissue) and performance [counter movement jump height (CMJ), CMJ peak power, CMJ relative peak power, squat jump height (SJ), SJ peak power, SJ relative peak power, 5-, 10- and 20 m sprint times and Yo-Yo Intermittent Recovery Test Level 2 (Yo-YoIRT2)] during 'the early in-season' phase...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28658079/validity-and-usability-of-a-new-system-for-measuring-and-monitoring-variations-in-vertical-jump-performance
#16
Irineu Loturco, Lucas A Pereira, Ronaldo Kobal, Katia Kitamura, César C Cal Abad, Guilherme Marques, Aristide Guerriero, José E Moraes, Fábio Y Nakamura
Vertical jump height (VJ) is one of the most sensitive measures to quantify training-related fatigue and athletic performance in elite athletes. Currently, however, there is no equipment designed to graphically deliver the daily performance changes in VJ compared with the smallest worthwhile change (SWC), which is considered essential in "progressive statistics" to judge meaningful performance fluctuations. The aims of the study were to analyze the criterion validity of a new contact mat (i.e., Elite Jump®), alongside testing its usability to detect meaningful changes in VJ of elite team sport athletes...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28658074/effect-of-physical-and-psychosocial-interventions-on-hormone-and-performance-outcomes-in-professional-rugby-union-players-a-systematic-review
#17
Joshua Strahorn, Benjamin G Serpell, Andrew McKune, Kate L Pumpa
This systematic review investigates the acute effects of physical or psychosocial interventions on testosterone and cortisol responses in elite male rugby union players, and the subsequent association with physical performance areas (e.g. strength, power, sprint performance) or key performance indicators (e.g. coach-identified skills). Medline (via EBSCO), SPORTDiscus, Web of Science, Informit, Proquest, Cochrane and Scopus were searched for relevant articles. Nine articles met the inclusion criteria, with six articles examining the effect of speed, strength or power training, and the remaining three psychosocial interventions...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28657854/differences-between-relative-and-absolute-speed-and-metabolic-thresholds-in-rugby-league
#18
Tannath J Scott, Heidi R Thornton, Macfarlane T U Scott, Ben J Dascombe, Grant M Duthie
PURPOSE: This study compared relative and absolute speed and metabolic thresholds for quantifying match output in elite rugby league. METHODS: Twenty-six professional players competing in the National Rugby League (NRL) were monitored with global positioning systems (GPS) across a rugby league season. Absolute speed [moderate-intensity running (MIRTh >3.6 m·s(-1)); high intensity running (HIRTh > 5.2 m·s(-1))] and metabolic (>20 W·kg(-1)) thresholds were compared to individualised ventilatory [first (VT1IFT), and second (VT2IFT)] thresholds estimated from the 30-15 intermittent fitness test (30-15IFT), as well as the metabolic threshold associated with VT2IFT (HPmetVT2), to examine difference in match-play demands...
June 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28655743/landing-related-ankle-injuries-do-not-occur-in-plantarflexion-as-once-thought-a-systematic-video-analysis-of-ankle-injuries-in-world-class-volleyball
#19
Christopher Skazalski, Jacek Kruczynski, Martin Aase Bahr, Tone Bere, Rod Whiteley, Roald Bahr
BACKGROUND: Ankle injuries are prevalent in elite volleyball and suggested to result from player contact at the net. Traditionally, ankle sprains are thought to happen in a plantarflexed position, but case studies suggest plantarflexion may not be involved. AIM: Describe the injury situations and mechanisms of ankle injuries in world-class volleyball based on systematic video analysis of injuries reported through the Fédération Internationale de Volleyball (FIVB) Injury Surveillance System...
June 27, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28648242/super-elite-athletes-some-complimentary-observations-from-australia-and-some-lessons-for-sports-expertise-research-comment-on-hardy-et-al
#20
Damian Farrow
This commentary provides an Australian perspective through the lens of former Australian tennis players' reflections of their journey to becoming super/elite tennis players. Their observations are largely supportive of the findings of the target article. Further, the experimental design and terminology used in the target article are contextualized from the perspective of sports expertise research.
2017: Progress in Brain Research
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