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https://www.readbyqxmd.com/read/29674008/applying-systems-ergonomics-methods-in-sport-a-systematic-review
#1
Adam Hulme, Jason Thompson, Katherine L Plant, Gemma J M Read, Scott Mclean, Amanda Clacy, Paul M Salmon
INTRODUCTION: As sports systems become increasingly more complex, competitive, and technology-centric, there is a greater need for systems ergonomics methods to consider the performance, health, and safety of athletes in context with the wider settings in which they operate. Therefore, the purpose of this systematic review was to identify and critically evaluate studies which have applied a systems ergonomics research approach in the context of sports performance and injury management...
April 16, 2018: Applied Ergonomics
https://www.readbyqxmd.com/read/29673243/the-effect-of-additional-carbohydrate-supplements-for-7-days-after-prolonged-interval-exercise-on-exercise-performance-and-energy-metabolism-during-submaximal-exercise-in-team-sports-athletes
#2
Hun-Young Park, Jisu Kim, Miyoung Park, Nana Chung, Kiwon Lim
PURPOSE: The purpose of our study was to determine the effectiveness of carbohydrate loading by additional carbohydrate supplements for 7 days after prolonged interval exercise on exercise performance and energy metabolism during submaximal exercise in team-sports athletes. METHODS: Twenty male team-sports athletes (14 soccer and 6 rugby players) volunteered to participate in the study and were equally divided into the experimental group (EXP, n=10) performing additional carbohydrate supplementation for 7 days after prolonged interval exercise until blood glucose level reaches 50 mg/dL or less and the control group (CON, n=10)...
March 30, 2018: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/29661767/-pre-activity-movement-control-exercise-programme-to-prevent-injuries-in-youth-rugby-some-concerns
#3
EDITORIAL
Adam John White, John Batten, Graham Kirkwood, Eric Anderson, Allyson M Pollock
No abstract text is available yet for this article.
April 16, 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29657045/the-relationship-between-left-ventricular-structure-and-function-in-the-elite-rugby-football-league-athlete-as-determined-by-conventional-echocardiography-and-myocardial-strain-imaging
#4
Lynsey Forsythe, David Hunter MacIver, Christopher Johnson, Keith George, John Somauroo, Michael Papadakis, Benjamin Brown, Mohammad Qasem, David Oxborough
AIMS: The aims of this study were to establish the left ventricular (LV) phenotype in rugby football league (RFL) athletes and to mathematically model the association between LV size, strain (ɛ) and ejection fraction (EF). METHODS AND RESULTS: 139 male athletes underwent echocardiographic LV evaluation including ɛ imaging. Non-athletic males were used for comparison. All absolute and scaled structural indices were significantly larger (P < 0.05) in athletes with a predominance for normal LV geometry...
June 15, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29651857/physical-and-physiological-demands-of-elite-rugby-union-officials
#5
Matthew R Blair, Nathan Elsworthy, Nancy J Rehrer, Chris Button, Nicholas D Gill
PURPOSE: To examine the movement and physiological demands of rugby union officiating within elite competition. METHODS: Movement demands of 9 elite officials across 12 Super Rugby matches were calculated, using global positioning system devices. Total distance (m), relative distance (m·min-1 ), percentage time spent within various speed zones were calculated across a match. Heart rate responses were also recorded throughout each match. Cohen d effect sizes were reported to examine the within match variations...
April 13, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29629620/differential-training-loads-and-individual-fitness-responses-to-pre-season-in-professional-rugby-union-players
#6
Shaun J McLaren, Andrew Smith, Jonathan D Bartlett, Iain R Spears, Matthew Weston
We aimed to compare differentiated training loads (TL) between fitness responders and non-responders to an eight-week pre-season training period in a squad of thirty-five professional rugby union players. Differential TL were calculated by multiplying player's perceptions of breathlessness (sRPE-B) and leg muscle exertion (sRPE-L) with training duration for each completed session. Performance-based fitness measures included the Yo-Yo Intermittent Recovery Test Level 1 (YYIRTL1), 10-, 20-, and 30-m linear sprint times, countermovement jump height (CMJ) and predicted one-repetition maximum back squat (P1RM Squat)...
April 9, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29627029/reported-concussion-incidence-in-youth-community-rugby-union-and-parental-assessment-of-post-head-injury-cognitive-recovery-using-the-king-devick-test
#7
David Silver, Nicola Brown, Conor Gissane
AIM: To assess the frequency of reported head injuries in youth community Rugby Union and determine whether the King-Devick (K-D) test could be used by parents as a means to chart cognitive recovery following head injury. METHODS: A prospective cohort study of 489 junior players (U9-U18) conducted at a community level Rugby Union club over four seasons. All players undertook a baseline K-D test at the start of each season. Players identified with suspected concussion performed the K-D test post injury and results were compared to their most recent baseline assessment...
May 15, 2018: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29621279/assessing-worst-case-scenarios-in-movement-demands-derived-from-global-positioning-systems-during-international-rugby-union-matches-rolling-averages-versus-fixed-length-epochs
#8
Daniel J Cunningham, David A Shearer, Neil Carter, Scott Drawer, Ben Pollard, Mark Bennett, Robin Eager, Christian J Cook, John Farrell, Mark Russell, Liam P Kilduff
The assessment of competitive movement demands in team sports has traditionally relied upon global positioning system (GPS) analyses presented as fixed-time epochs (e.g., 5-40 min). More recently, presenting game data as a rolling average has become prevalent due to concerns over a loss of sampling resolution associated with the windowing of data over fixed periods. Accordingly, this study compared rolling average (ROLL) and fixed-time (FIXED) epochs for quantifying the peak movement demands of international rugby union match-play as a function of playing position...
2018: PloS One
https://www.readbyqxmd.com/read/29614939/sports-injuries-in-victoria-2012-13-to-2014-15-evidence-from-emergency-department-records
#9
D Tharanga Fernando, Janneke Berecki-Gisolf, Caroline F Finch
OBJECTIVES: To report the incidence of presentations to emergency departments (EDs) in Victoria for sport- and active recreation-related injuries; to establish which sports have the highest rates of injury per participant; to assess the effects of age and sport type on the rate of serious sport injury (resulting in admission to hospital). DESIGN, SETTING AND PARTICIPANTS: Retrospective analysis of 171 541 ED presentations to 38 Victorian hospitals, 2012-13 to 2014-15...
April 2, 2018: Medical Journal of Australia
https://www.readbyqxmd.com/read/29608414/bigger-stronger-faster-fitter-the-differences-in-physical-qualities-of-school-and-academy-rugby-union-players
#10
Ben Jones, Dan Weaving, Jason Tee, Joshua Darrall-Jones, Jonathon Weakley, Padraic Phibbs, Dale Read, Gregory Roe, Sharief Hendricks, Kevin Till
Limited research has compared the physical qualities of adolescent rugby union (RU) players across differing playing standards. This study therefore compared the physical qualities of academy and school Under-18 RU players. One-hundred and eighty-four (professional regional academy, n = 55 school, n = 129) male RU players underwent a physical testing battery to quantify height, body mass, strength (bench press and pull-up), speed (10, 20 and 40 m), 10 m momentum (calculated; 10 m velocity * body mass) and a proxy measure of aerobic fitness (Yo-Yo Intermittent Recovery Test Level 1; IRTL1)...
April 2, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29602475/concurrent-validation-of-an-inertial-measurement-system-to-quantify-kicking-biomechanics-in-four-football-codes
#11
Stephanie Blair, Grant Duthie, Sam Robertson, William Hopkins, Kevin Ball
Wearable inertial measurement systems (IMS) allow for three-dimensional analysis of human movements in a sport-specific setting. This study examined the concurrent validity of a IMS (Xsens MVN system) for measuring lower extremity and pelvis kinematics in comparison to a Vicon motion analysis system (MAS) during kicking. Thirty footballers from Australian football (n = 10), soccer (n = 10), rugby league and rugby union (n = 10) clubs completed 20 kicks across four conditions. Concurrent validity was assessed using a linear mixed-modelling approach, which allowed the partition of between and within-subject variance from the device measurement error...
March 21, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29599868/strength-and-conditioning-coaches-application-of-the-session-rating-of-perceived-exertion-method-of-monitoring-within-professional-rugby-union
#12
Thomas Comyns, Aoife Hannon
Session rating of perceived exertion (session-RPE) is a method of monitoring and managing training loads. The purpose of this study was to research how and for what purpose strength and conditioning (S&C) coaches implement this monitoring method within professional rugby union. The study also aimed to assess if S&C coaches found this monitoring method to be valid and effective. An online survey containing 24 fixed response questions was used to assess how S&C coaches applied the session-RPE method...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29595083/playing-surface-and-uk-professional-rugby-union-injury-risk
#13
Craig Ranson, Jonathan George, James Rafferty, John Miles, Isabel Moore
Artificial rugby union playing surface installation is increasing. This prospective cohort study aimed to examine the effect of playing surface on match injury types within 157 players of two UK professional rugby union clubs playing 209 matches (96 on artificial surfaces and 113 on grass) over three seasons. There was no difference in overall injury risk between the two playing surfaces with injury incidence on artificial 80.2 (CI 69.9-91.7) and on grass 81.9 per 1000 match-hours (CI 72.2-92.5), with an incidence rate ratio (RR) of 0...
March 29, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29584514/the-same-story-or-a-unique-novel-within-participant-principle-component-analysis-of-training-load-measures-in-professional-rugby-union-skills-training
#14
Dan Weaving, Nicholas E Dalton, Christopher Black, Joshua Darrall-Jones, Padraic J Phibbs, Michael Gray, Ben Jones, Gregory A B Roe
PURPOSE: The study aimed to identify which combination of external and internal training load (TL) metrics capture similar or unique information for individual professional players during skills training in rugby union using principal component analysis (PCA). METHOD: TL data were collected from twenty-one male professional rugby union players across a competitive season. This included PlayerLoad™, total distance (TD), and individualised high-speed distance (HSD; >61% maximal velocity; all external TL) obtained from a micro-technology device worn by each player (Optimeye X4, Catapult Innovations, Melbourne, Australia) and the session-rating of perceived exertion (sRPE; internal TL)...
March 27, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29581994/does-the-reliability-of-reporting-in-injury-surveillance-studies-depend-on-injury-definition
#15
Matthew Cross, Sean Williams, Simon P T Kemp, Colin Fuller, Aileen Taylor, John Brooks, Grant Trewartha, Keith Stokes
Background: Choosing an appropriate definition for injury in injury surveillance studies is essential to ensure a balance among reporting reliability, providing an accurate representation of injury risk, and describing the nature of the clinical demand. Purpose: To provide guidance on the choice of injury definition for injury surveillance studies by comparing within- and between-team variability in injury incidence with >24-hour and >7-day time-loss injury definitions in a large multiteam injury surveillance study...
March 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29572956/trends-in-time-loss-injuries-during-the-2011-2016-south-african-rugby-youth-weeks
#16
Nicola Sewry, Evert Verhagen, Mike Lambert, Willem van Mechelen, Jarred Marsh, Clint Readhead, Wayne Viljoen, James Brown
OBJECTIVES: Youth rugby is a popular sport in South Africa (SA) with a high injury incidence. The annual SA Rugby Youth Week tournaments attract the top age group players in the country providing a sample of players for reliable injury surveillance. The aim of the study was to analyse the changes in time-loss injury rates at the SA Rugby Youth Week tournaments between 2011 and 2016, differences between age-groups, and to investigate associated injury risk factors. METHODS: All confirmed time-loss injuries at the four age group tournaments (under-13, under-16 and two under-18) from 2011-2016 were recorded...
March 23, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29569055/collision-activity-during-training-increases-total-energy-expenditure-measured-via-doubly-labelled-water
#17
Nessan Costello, Kevin Deighton, Thomas Preston, Jamie Matu, Joshua Rowe, Thomas Sawczuk, Matt Halkier, Dale B Read, Daniel Weaving, Ben Jones
PURPOSE: Collision sports are characterised by frequent high-intensity collisions that induce substantial muscle damage, potentially increasing the energetic cost of recovery. Therefore, this study investigated the energetic cost of collision-based activity for the first time across any sport. METHODS: Using a randomised crossover design, six professional young male rugby league players completed two different 5-day pre-season training microcycles. Players completed either a collision (COLL; 20 competitive one-on-one collisions) or non-collision (nCOLL; matched for kinematic demands, excluding collisions) training session on the first day of each microcycle, exactly 7 days apart...
March 22, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29563095/king-devick-concussion-test-performs-poorly-as-a-screening-tool-in-elite-rugby-union-players-a-prospective-cohort-study-of-two-screening-tests-versus-a-clinical-reference-standard
#18
Gordon Ward Fuller, Matthew J Cross, Keith A Stokes, Simon P T Kemp
BACKGROUND: The King-Devick (KD) test is an objective clinical test of eye movements that has been used to screen for concussion. We characterised the accuracy of the KD test and the World Rugby Head Injury Assessment (HIA-1) screening tools as methods of off-field evaluation for concussion after a suspicious head impact event. METHODS: A prospective cohort study was performed in elite English rugby union competitions between September 2016 and May 2017. The study population comprised consecutive players identified with a head impact event with the potential to result in concussion...
March 21, 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29559318/the-ball-in-play-demands-of-international-rugby-union
#19
Benjamin T Pollard, Anthony N Turner, Robin Eager, Daniel J Cunningham, Christian J Cook, Patrick Hogben, Liam P Kilduff
OBJECTIVES: Rugby union is a high intensity intermittent sport, typically analysed via set time periods or rolling average methods. This study reports the demands of international rugby union via global positioning system (GPS) metrics expressed as mean ball in play (BiP), maximum BiP (max BiP), and whole match outputs. DESIGN: Single cohort cross sectional study involving 22 international players, categorised as forwards and backs. METHODS: A total of 88 GPS files from eight international test matches were collected during 2016...
March 3, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29544911/the-efficacy-of-an-iterative-sequence-of-prevention-approach-to-injury-prevention-by-a-multidisciplinary-team-in-professional-rugby-union
#20
Jason C Tee, Sheree Bekker, Rob Collins, Jannie Klingbiel, Ivan van Rooyen, David van Wyk, Kevin Till, Ben Jones
OBJECTIVES: Due to the complex systems nature of injuries, the responsibility for injury risk management cannot lie solely within a single domain of professional practice. Interdisciplinary collaboration between technical/tactical coaches, strength and conditioning coaches, team doctors, physical therapists and sport scientists is likely to have a meaningful impact on injury risk. This study describes the application and efficacy of a multidisciplinary approach to reducing team injury risk in professional rugby union...
February 14, 2018: Journal of Science and Medicine in Sport
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