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https://www.readbyqxmd.com/read/28723812/effects-of-12-weeks-resistance-training-on-sprint-and-jump-performance-in-competitive-adolescent-rugby-union-players
#1
Simon K Harries, David R Lubans, Anthony Buxton, Thomas H J MacDougall, Robin Callister
Sprint performance is an important characteristic for success in many sports, including rugby union. Resistance training is used to increase muscular fitness (i.e. strength, endurance and power) and may also be effective for improving sprint and jump performances. The aims of this study were to examine the effects of resistance training using two different periodized programs (linear and daily undulating) on sprint and jump performance and explore relationships between performance measures. Sixteen male (16...
July 17, 2017: Journal of Strength and Conditioning Research
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/28708701/self-reported-concussion-history-and-sensorimotor-tests-predict-head-neck-injuries
#3
Julie A Hides, Melinda M Franettovich Smith, M Dilani Mendis, Julia Treleaven, Andrew H Rotstein, Christopher T Sexton, Nancy Low Choy, Paul McCrory
PURPOSE: Sports related concussion (SRC) is a risk for players involved in high impact, collision sports. A history of SRC is a risk factor for future concussions, but the mechanisms underlying this are unknown. Despite evidence that most visible signs and symptoms associated with sports concussion resolve within 7-10 days, it has been proposed that subclinical loss of neuromuscular control and impaired motor functioning may persist and be associated with further injury. Alternatively, indicators of poor sensorimotor performance could be independent risk factors...
July 13, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28701366/evidence-in-support-of-the-call-to-ban-the-tackle-and-harmful-contact-in-school-rugby-a-response-to-world-rugby
#4
REVIEW
Allyson M Pollock, Adam John White, Graham Kirkwood
In a paper published in BJSM (June 2016), World Rugby employees Ross Tucker and Martin Raftery and a third coauthor Evert Verhagen took issue with the recent call to ban tackling in school rugby in the UK and Ireland. That call (to ban tackling) was supported by a systematic review published in BJSM Tucker et al claim that: (1) the mechanisms and risk factors for injury along with the incidence and severity of injury in youth rugby union have not been thoroughly identified or understood; (2) rugby players are at no greater risk of injury than other sports people, (3) this is particularly the case for children under 15 years and (4) removing the opportunity to learn the tackle from school pupils might increase rates of injuries...
July 12, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28687400/a-systems-approach-to-understanding-the-identification-and-treatment-of-sport-related-concussion-in-community-rugby-union
#5
Amanda Clacy, Natassia Goode, Rachael Sharman, Geoff P Lovell, Paul Salmon
AIM: The aim of the present study was to utilise a systems thinking approach to explore the perceived responsibilities for identifying and treating concussion held by different actors across the community rugby system (e.g., players, coaches, parents, medics, referees, and management), as well as their role-specific concussion management strategies. METHODS: A systems approach was taken to assess what different stakeholders within rugby systems perceive their roles to be regarding concussion identification and treatment...
July 4, 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28675124/combined-individual-scrummaging-kinetics-and-muscular-power-predict-competitive-team-scrum-success
#6
Andrew Green, Chloe Dafkin, Samantha Kerr, Warrick McKinon
Scrummaging is a major component of Rugby Union gameplay. Successful scrummaging is dependent on the coordination of the forward players and the strength of the eight individuals. The study aim was to determine whether individual scrummaging kinetics and other candidate factors associated with scrummaging performance discriminate team scrum performances. Sixteen club-level forwards (stature: 1.80 ± 0.1 m; mass: 99.0 ± 18.2 kg) were initially divided into two scrummaging packs. A total of 10 various scrum permutations were tested, where players were randomly swapped between the two packs...
July 4, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28665765/the-association-between-comt-rs4680-and-5-httlpr-genotypes-and-concussion-history-in-south-african-rugby-union-players
#7
Sarah Mc Fie, Shameemah Abrahams, Jon Patricios, Jason Suter, Michael Posthumus, Alison V September
The objective was to investigate the relationship between Catechol-O-methyltransferase (COMT) rs4680 and serotonin-transporter-linked polymorphic region (5-HTTLPR) genotypes with concussion history and personality traits. Rugby players ("all levels": n = 303), from high schools ("junior", n = 137), senior amateur, and professional teams ("senior", n = 166), completed a self-reported concussion history questionnaire, Cloninger's Tridimensional Personality Questionnaire, and donated a DNA sample. Participants were allocated into control (non-concussed, n = 140), case (all) (previous suspected or diagnosed concussions, n = 163), or case (diagnosed only) (previous diagnosed concussion, n = 140) groups...
June 30, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28663217/a-video-analysis-of-head-injuries-satisfying-the-criteria-for-a-head-injury-assessment-in-professional-rugby-union-a-prospective-cohort-study
#8
Ross Tucker, Martin Raftery, Gordon Ward Fuller, Ben Hester, Simon Kemp, Matthew J Cross
OBJECTIVES: Concussion is the most common match injury in professional Rugby Union, accounting for 25% of match injuries. The primary prevention of head injuries requires that the injury mechanism be known so that interventions can be targeted to specifically overall incidence by focusing on characteristics with the greatest propensity to cause a head injury. METHODS: 611 head injury assessment (HIA) events in professional Rugby Union over a 3-year period were analysed, with specific reference to match events, position, time and nature of head contact...
June 29, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28663136/can-salivary-testosterone-and-cortisol-reactivity-to-a-mid-week-stress-test-discriminate-a-match-outcome-during-international-rugby-union-competition
#9
Blair T Crewther, Neil Potts, Liam P Kilduff, Scott Drawer, Christian J Cook
OBJECTIVES: Evidence suggests that stress-induced changes in testosterone and cortisol are related to future competitive behaviours and team-sport outcomes. Therefore, we examined whether salivary testosterone and cortisol reactivity to a mid-week stress test can discriminate a match outcome in international rugby union competition. DESIGN: Single group, quasi-experimental design with repeated measures. METHOD: Thirty-three male rugby players completed a standardised stress test three or four days before seven international matches...
June 2, 2017: Journal of Science and Medicine in Sport
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
#10
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/28657806/profiling-single-leg-balance-by-leg-preference-and-position-in-rugby-union-athletes
#11
Scott R Brown, Matt Brughelli, Seth Lenetsky
Our aims were to assess single-leg balance in rugby union athletes and compare the stability indices between legs and between positions. Thirty athletes, forwards and backs (n=15/15) performed single-leg balance measured at two difficulty levels (Level 8 [more stable] and Level 2 [less stable]) using the Biodex Balance SD System. The backs' non-preferred leg had worse scores in medial-lateral and overall indices (ES=1.05 and 0.63) compared to the preferred leg on Level 8 stability. Backs had better scores in all indices in the preferred (ES=-1...
June 28, 2017: Motor Control
https://www.readbyqxmd.com/read/28650747/kinetic-and-kinematic-analysis-of-stamping-impacts-during-simulated-rucking-in-rugby-union
#12
Bodil Y Oudshoorn, Heather F Driscoll, Marcus Dunn, David James
Laceration injuries account for up to 23% of injuries in rugby union. They are frequently caused by studded footwear as a result of a player stamping onto another player during the ruck. Little is known about the kinetics and kinematics of rugby stamping impacts; current test methods assessing laceration injury risk of stud designs therefore lack informed test parameters. In this study, twelve participants stamped on an anthropomorphic test device in a one-on-one simulated ruck setting. Velocity and inclination angle of the foot prior to impact was determined from high-speed video footage...
June 26, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28645497/an-association-between-polymorphisms-within-the-apoe-gene-and-concussion-aetiology-in-rugby-union-players
#13
Shameemah Abrahams, Sarah Mc Fie, Jon Patricios, Jason Suter, Michael Posthumus, Alison V September
OBJECTIVES: Concussion refers to changes in neurological function due to biomechanical forces transmitted to the head. The APOE ε4 allele is associated with brain injury severity. The objective was to determine if APOE gene variants are associated with concussion history and severity in rugby players. DESIGN: In total, 128 non-concussed controls and 160 previously concussed participants (all cases N=160; diagnosed N=139) were recruited from high school (junior, N=121), club (N=116) and professional rugby teams (N=51)...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28642222/risk-factors-for-head-injury-events-in-professional-rugby-union-a-video-analysis-of-464-head-injury-events-to-inform-proposed-injury-prevention-strategies
#14
Ross Tucker, Martin Raftery, Simon Kemp, James Brown, Gordon Fuller, Ben Hester, Matthew Cross, Ken Quarrie
OBJECTIVES: The tackle is responsible for the majority of head injuries during rugby union. In order to address head injury risk, risk factors during the tackle must first be identified. This study analysed tackle characteristics in the professional game in order to inform potential interventions. METHODS: 464 tackles resulting in a head injury assessment (HIA) were analysed in detail, with tackle type, direction, speed, acceleration, nature of head contact and player body position the characteristics of interest...
June 22, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28641863/a-comparison-of-different-heat-maintenance-methods-implemented-during-a-simulated-half-time-period-in-professional-rugby-union-players
#15
Mark Russell, Reuben Tucker, Christian J Cook, Thibault Giroud, Liam P Kilduff
OBJECTIVES: In thermoneutral conditions, half-time is associated with reductions in body temperature that acutely impair performance. This laboratory-based study compared active, passive, and combined methods of half-time heat maintenance. DESIGN: Randomised, counterbalanced, cross-over. METHODS: After a standardised warm-up (WU) and 15min of rest, professional Rugby Union players (n=20) completed a repeated sprint test (RSSA1). Throughout a simulated half-time (temperature: 20...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28627293/new-evidence-of-relative-age-effects-in-super-elite-sportsmen-a-case-for-the-survival-and-evolution-of-the-fittest
#16
Benjamin D Jones, Gavin P Lawrence, Lew Hardy
The relative age effect (RAE) describes an overrepresentation of players born early (Q1) in a selection year and is highly prevalent within youth sport pathways. However, a dearth of research has investigated the RAE at the "super-elite" level. The present research assessed the presence of RAE in super-elite performers. Study 1 investigated RAEs in the world's best international Test cricketers (N = 262) over a 20-year period according to a robust and stringent "super-elite" criteria. Results revealed the RAE (Q1) when all disciplines were combined...
June 19, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28573403/a-kinetic-model-describing-injury-burden-in-team-sports
#17
Colin W Fuller
BACKGROUND: Injuries in team sports are normally characterised by the incidence, severity, and location and type of injuries sustained: these measures, however, do not provide an insight into the variable injury-burden experienced during a season. Injury burden varies according to the team's match and training loads, the rate at which injuries are sustained and the time taken for these injuries to resolve. At the present time, this time-based variation of injury burden has not been modelled...
June 1, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28564743/forced-retirement-from-professional-rugby-union-is-associated-with-symptoms-of-distress
#18
James Craig Brown, Gino Kerkhoffs, Mike I Lambert, Vincent Gouttebarge
Rugby has a higher injury burden than other popular sports, such as football. Athletes who are forced to retire as a result of injury are associated with poor mental health. With its high injury burden, professional rugby players might be at risk of mental health conditions associated with injury-related forced retirement. This study aimed to compare mental health between former professional rugby players who were and weren't forced to retire. A questionnaire including the 4DSQ (distress), GHQ-12 (anxiety/depression), PROMIS short-form (sleep disturbance) and AUDIT-C (alcohol misuse) was completed by retired professional players from Ireland, France and South Africa...
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28562186/the-appropriateness-of-training-exposures-for-match-play-preparation-in-adolescent-schoolboy-and-academy-rugby-union-players
#19
Padraic J Phibbs, Ben Jones, Dale B Read, Gregory A B Roe, Joshua Darrall-Jones, Jonathon J S Weakley, Andrew Rock, Kevin Till
The aim of this study was to compare the physical and movement demands between training and match-play in schoolboy and academy adolescent rugby union (RU) players. Sixty-one adolescent male RU players (mean ± SD; age 17.0 ± 0.7 years) were recruited from four teams representing school and regional academy standards. Players were categorised into four groups based on playing standard and position: schoolboy forwards (n = 15), schoolboy backs (n = 15), academy forwards (n = 16) and academy backs (n = 15)...
May 31, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28558447/physical-characteristics-associated-with-neck-pain-and-injury-in-rugby-union-players
#20
Suzanne J Snodgrass, Peter G Osmotherly, Susan A Reid, Peter D Milburn, Darren A Rivett
BACKGROUND: Neck pain and injury are common in rugby union. Physical characteristics predisposing players to neck injury are largely unknown. This study aimed to determine physical characteristics associated with neck pain and injury in rugby union players. METHODS: Semi-professional rugby union players (n=142) underwent pre-season measurements including cervical active range of motion (AROM), strength, sensorimotor proprioception (joint position error), and anthropometry...
May 30, 2017: Journal of Sports Medicine and Physical Fitness
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