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Unlabelled: In rugby union, published analyses of actions and movements of players during matches have been limited to small samples of games at regional or national level.
Objectives: To analyse movements and activities of players in international rugby union matches with a sample size sufficient to clearly delineate positional roles.
Design: Observational study.
Methods: Actions of 763 players were coded from video recordings of 90 international matches played by the New Zealand national team (the All Blacks) from 2004 to 2010. Movements of players were coded for 27 of these matches via a semi-automated player-tracking system. Movements and activities of all players from both teams were coded.
Results: Cluster analysis of activities and time-motion variables produced five subgroups of forwards (props, hookers, locks, flankers, Number 8 forwards) and five subgroups of backs (scrum-half, fly-half, midfield backs, wings and fullbacks). Forwards sustained much higher contact loads per match than backs, via scrums, rucks, tackles and mauls. Mean distance covered per match ranged from 5400 to 6300m, with backs generally running further than forwards. There were marked differences between positional groups in the amount of distance covered at various speeds. The amount of play per match varies by position due to differences in rates at which players are substituted.
Conclusions: The distance covered by players at relatively fast running speeds (in excess of 5ms(-1)) appears to be higher during international matches than when competing at lower levels of the professional game. The specific match demands for positional groups need to be considered when managing player workloads.
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http://dx.doi.org/10.1016/j.jsams.2012.08.005 | DOI Listing |
Phys Sportsmed
December 2024
Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE, USA.
Objectives: To cross-sectionally determine 1) the association between lifetime diagnosed concussion and upper extremity musculoskeletal injury (UE-MSI) amongst a novel cohort of community rugby union players and 2) the sex specific risk of UE-MSI given concussion history among these rugby players.
Methods: 1,037 (31.0% female, 31.
J Sci Med Sport
November 2024
World Rugby, Pty (Ltd), Ireland. Electronic address: https://twitter.com/Scienceofsport.
Objectives: To evaluate if the tackler correctly adhering, or not, to four different instructions of legal front-on one-on-one torso tackles altered the tackler and/or ball carrier peak inertial head kinematics.
Design: Controlled laboratory study.
Methods: Fifteen rugby-code players measured with three-dimensional optoelectronic motion capture performed two tackle instructions from the Australian National Rugby League coaching manual on under (Dominant National Rugby League) and over (Smother National Rugby League) the ball tackles, and two novel variants of these (under, Dominant, Torso Stick; over, Smother, Pop, Lock).
Phys Sportsmed
December 2024
Medical Department, World Rugby, Dublin, Ireland.
Objectives: Concussion is a common injury in rugby union ('rugby') and yet its diagnosis is reliant on clinical judgment. Oculomotor testing could provide an objective measure to assist with concussion diagnosis. NeuroFlex® evaluates oculomotor function using a virtual-reality headset.
View Article and Find Full Text PDFJ Sports Sci
December 2024
Applied Sport, Technology, Exercise and Medicine, College of Engineering, Swansea University, Swansea, Wales, UK.
This study first investigated how the probability of winning collision events is affected by technical characteristics among world-class, international female rugby union players, and second, whether enhanced performance of these technical characteristics was related to physical attributes. Carry and tackle events from 16 international matches played by a top-two world ranking team were coded according to technical characteristics and performance outcomes. Binary classification tree models revealed that carry performance was successfully predicted ( < 0.
View Article and Find Full Text PDFJ Sci Med Sport
December 2024
World Rugby, Ireland. Electronic address:
Objectives: The EyeGuide Focus system is a simple, portable, test of visual tracking with potential use for concussion screening. This study investigated the repeatability, reproducibility, distribution, and modifiers of EyeGuide Focus measurements in healthy elite Rugby players.
Design: Cross sectional repeated measures study and controlled pre-test post-test sub-study.
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