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https://www.readbyqxmd.com/read/29021244/tackling-concussion-in-professional-rugby-union-a-case-control-study-of-tackle-based-risk-factors-and-recommendations-for-primary-prevention
#1
Matthew J Cross, Ross Tucker, Martin Raftery, Ben Hester, Sean Williams, Keith A Stokes, Craig Ranson, Prav Mathema, Simon Kemp
BACKGROUND/AIM: Concussion, the most common injury in professional rugby union, occurs most commonly during the tackle. Thus, we investigated the association between tackle characteristics and concussion. METHODS: 182 video clips of tackles leading to clinically diagnosed concussion and 4619 tackles that did not were coded across three professional rugby union competitions. A variable selection process was undertaken to identify the most important variables for interpretation...
October 11, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29016482/relationship-between-physical-performance-testing-results-and-peak-running-intensity-during-professional-rugby-league-match-play
#2
Grant M Duthie, Heidi R Thornton, Jace A Delaney, James T McMahon, Dean T Benton
The purpose of this study was to examine the relationship between individual athletes' physical characteristics and both the peak running intensities and the decline in peak running intensities during competition. Twenty-two professional rugby league athletes (age; 24.1 ± 4.0 years, body mass; 101.4 ± 9.5 kg) underwent a series of physical testing procedures. Peak running intensity was determined using a moving average technique, applied to the speed (m·min), acceleration/deceleration (m·s) and metabolic power (W·kg) during competition, across 10 different durations...
October 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29016478/subjective-and-objective-responses-to-two-rugby-7-s-world-series-competitions
#3
Peter M Fowler, Andrew Murray, Abdulaziz Farooq, Nick Lumley, Lee Taylor
The purpose was to examine the utility of subjective and objective measures of player preparedness, interpreted at both a group and individual level, during two consecutive competitions of the World Rugby Sevens Series (WRSS). Subjective (sleep, energy and muscle soreness ratings) and objective [heart rate (HR) at rest (HRREST) and in response to submaximal exercise (HREX)] measures were obtained from 16 male Rugby-7s players from one team for three consecutive days (D1-3) at home (HOME) and upon arrival at four tournament (T1-4) locations (T1-New Zealand and T2-USA; T3-Hong Kong and T4-Tokyo) across two WRSS competitions (two tournaments per competition) separated by 1 month...
October 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28972405/staying-in-the-game-a-pilot-study-examining-the-efficacy-of-protective-headgear-in-an-animal-model-of-mild-traumatic-brain-injury-mtbi
#4
Sydney Candy, Irene Ma, Jill M McMahon, Michael Farrell, Richelle Mychasiuk
PRIMARY OBJECTIVE: Rugby is one of the few contact sports that do not mandate protective headgear, possibly because studies have shown poor efficacy for protection related to concussion pathology with existing headguards. RESEARCH DESIGN: Following innovative material technology utilization to produce headgear believed to have protective capabilities, this study examined the effects of a soft-shell headgear constructed from a novel viscoelastic material, on both behaviour and serum biomarkers after high and average impact force mild traumatic brain injuries (mTBI)...
October 3, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28969953/arthroscopic-centralization-achieved-good-clinical-improvements-and-radiographic-outcomes-in-a-rugby-player-with-osteoarthritis-after-subtotal-lateral-meniscectomy-a-case-report
#5
Yusuke Nakagawa, Takeshi Muneta, Toshifumi Watanabe, Masafumi Horie, Tomomasa Nakamura, Koji Otabe, Mai Katakura, Yusuke Sumi, Ichiro Sekiya, Hideyuki Koga
No abstract text is available yet for this article.
September 29, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28967296/development-of-expertise-in-elite-and-sub-elite-british-rugby-league-players-a-comparison-of-practice-experiences
#6
Martyn Rothwell, Joseph A Stone, Keith Davids, Craig Wright
Previous studies have investigated how individuals reach an expert level by counting the number of hours engaged in specific practice types. Here we sought to understand and compare the microstructure (e.g. practice tasks undertaken) of these practice hours experienced by elite and sub-elite British rugby league players. Semi-structured interviews explored the practice experiences of eight international and eight domestic level players. A two-staged thematic analysis was used to interpret the data. The analysis revealed that both player groups experienced a rich and narrow landscape of affordances and were exposed to early diversification of sports experiences during childhood...
September 30, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28965343/kinetic-sprint-asymmetries-on-a-non-motorised-treadmill-in-rugby-union-athletes
#7
Scott R Brown, Matt R Cross, Olivier Girard, Franck Brocherie, Pierre Samozino, Jean-Benoît Morin
The purpose of this study was to present a potential link between sprint kinetic (vertical [F V] and horizontal force [F H]) asymmetries and athletic performance during acceleration and maximal velocity (v max) sprinting. Thirty un-injured male rugby athletes performed 8-s sprints on a non-motorised treadmill. Kinetic data were divided into 'strong' and 'weak' legs based on individually averaged peak values observed during sprinting and were analysed to evaluate asymmetry. Large differences were found between the strong and weak legs in F H during acceleration (4...
October 1, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28959698/risk-factors-for-the-postoperative-recurrence-of-instability-after-arthroscopic-bankart-repair-in-athletes
#8
Shigeto Nakagawa, Tatsuo Mae, Seira Sato, Shinichiro Okimura, Miki Kuroda
BACKGROUND: Several risk factors for the postoperative recurrence of instability after arthroscopic Bankart repair have been reported, but there have been few detailed investigations of the specific risk factors in relation to the type of sport. PURPOSE: This study investigated the postoperative recurrence of instability after arthroscopic Bankart repair without additional reinforcement procedures in competitive athletes, including athletes with a large glenoid defect...
September 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28959048/health-amongst-former-rugby-union-players-a-cross-sectional-study-of-morbidity-and-health-related-quality-of-life
#9
Madeleine A M Davies, Andrew D Judge, Antonella Delmestri, Simon P T Kemp, Keith A Stokes, Nigel K Arden, Julia L Newton
In the general population, physical activity is associated with improved health outcomes. However, long-term sports participation may be associated with adverse outcomes, particularly at the elite level. The aims of this study were to assess morbidity and health-related quality of life (HrQoL) amongst former rugby players, compared to an age-standardised general population sample. A cross-sectional study of former elite, male, rugby players (n = 259) was undertaken, and standardised morbidity ratios (SMR) calculated, assessing morbidity prevalence relative to English Longitudinal Study of Aging participants (ELSA, n = 5186)...
September 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28954797/-world-rugby-concussion-by-world-rugby-limited-a-smartphone-application-for-the-general-public
#10
Osman Hassan Ahmed, Adam Arthur, Alastair Bolton, Alex Evens, Philip Slemon
No abstract text is available yet for this article.
September 27, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28952838/promoting-players-safety-and-welfare-through-the-sharing-of-scientific-knowledge-with-sports-agents-the-new-reality-of-portuguese-rugby-sevens
#11
Antonio Miguel Cruz-Ferreira, Eduardo Miguel Cruz-Ferreira, Luis Taborda-Barata, Luiz Miguel Santiago
No abstract text is available yet for this article.
September 27, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28951725/position-affects-performance-in-multiple-object-tracking-in-rugby-union-players
#12
Andrés Martín, Ana M Sfer, Marcela A D'Urso Villar, José F Barraza
We report an experiment that examines the performance of rugby union players and a control group composed of graduate student with no sport experience, in a multiple-object tracking task. It compares the ability of 86 high level rugby union players grouped as Backs and Forwards and the control group, to track a subset of randomly moving targets amongst the same number of distractors. Several difficulties were included in the experimental design in order to evaluate possible interactions between the relevant variables...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28942415/confusion-and-abdominal-symptoms-following-a-rugby-tackle
#13
Demetris Ioannides, Madeleine Davies, Stefan Kluzek
A 19-year-old man was sent to the emergency department following a pitch-side assessment for suspected concussion, unexplained upper abdominal tenderness and vomiting, following a high-impact tackle during a rugby match. A Focussed Assessment with Sonography for Trauma (FAST) scan performed in the emergency department suggested intra-abdominal free fluid, and subsequent head and abdominal CT imaging showed no intracranial lesion but confirmed a significant haemoperitoneum due to large splenic tear and bleeding...
September 23, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28934100/differences-in-the-movement-skills-and-physical-qualities-of-elite-senior-academy-rugby-league-players
#14
Matthew R E Ireton, Kevin Till, Dan Weaving, Ben Jones
The aim of the present study was to investigate (a) the differences in the movement skills and physical qualities between academy and senior rugby league players, and (b) the relationships between movement skills and physical qualities. Fifty-five male rugby league players (Senior, n=18; Under 19 n=23; Under 16, n=14) undertook a physical testing battery including anthropometric (stature & body mass), strength (isometric mid-thigh pull; IMTP) and power (countermovement jump; CMJ) qualities, alongside the athletic ability assessment (AAA; comprised of overhead squat, double lunge, single-leg Romanian deadlift, press-up and pull-up exercises)...
June 2, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28930932/complex-training-the-effect-of-exercise-selection-and-training-status-on-postactivation-potentiation-in-rugby-league-players
#15
David J Scott, Massimiliano Ditroilo, Phil A Marshall
Scott, DJ, Ditroilo, M, and Marshall, PA. Complex training: the effect of exercise selection and training status on postactivation potentiation in rugby league players. J Strength Cond Res 31(10): 2694-2703, 2017-This study compared the postactivation potentiation (PAP) response of the hex bar deadlift (HBD) and back squat (BS) exercises. The PAP response between different levels of athletes was also compared. Ten professional and 10 amateur rugby league players performed 2 experimental sessions. Participants performed a countermovement jump (CMJ) before and 2, 4, 6, 8, 10, 12, 14, and 16 minutes after a conditioning activity (CA) that contained 1 set of 3 repetitions at 93% 1 repetition maximum of either HBD or BS...
October 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28930869/quantifying-the-external-and-internal-loads-of-professional-rugby-league-training-modes-consideration-for-concurrent-field-based-training-prescription
#16
Dan Weaving, Ben Jones, Kevin Till, Phil Marshall, Keith Earle, Grant Abt
Practitioners prescribe numerous training modes to develop the varied physical qualities professional rugby league players must express during competition. The aim of the current study was to determine how the magnitude of external and internal training load per minute of time differs between modes in professional rugby league players. This data were collected from 17 players across 716 individual sessions (mean (SD) sessions: 42 (13) per player) which were categorised by mode (conditioning, small sided games, skills and sprint training)...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28918391/genetic-polymorphisms-associated-with-the-risk-of-concussion-in-1056-college-athletes-a-multicentre-prospective-cohort-study
#17
Thomas Roland Terrell, Ruth Abramson, Jeffery T Barth, Ellen Bennett, Robert C Cantu, Richard Sloane, Daniel T Laskowitz, David M Erlanger, Douglas McKeag, Gregory Nichols, Verle Valentine, Leslie Galloway
BACKGROUND/AIM: To evaluate the association of genetic polymorphisms APOE, APOE G-219T promoter, microtubule associated protein(MAPT)/tau exon 6 Ser(53)Pro, MAPT/tau Hist(47)Tyr, IL-6572 G/C and IL-6R(Asp)358(Ala) with the risk of concussion in college athletes. METHODS: A 23-centre prospective cohort study of 1056 college athletes with genotyping was completed between August 2003 and December 2012. All athletes completed baseline medical and concussion questionnaires, and post-concussion data were collected for athletes with a documented concussion...
September 16, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28912119/lower-extremity-symmetry-influences-knee-abduction-moments-during-sidestepping-in-rugby
#18
Scott Randall Brown
No abstract text is available yet for this article.
September 14, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28910543/intra-individual-variability-in-the-sleep-of-senior-and-junior-rugby-league-athletes-during-the-competitive-season
#19
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/28902112/the-efficacy-of-repeated-cold-water-immersion-on-recovery-following-a-simulated-rugby-union-protocol
#20
Sean Barber, Pattison John, Freddy Brown, Jessica Hill
Training and athletic competition frequently results in exercise induced muscle damage (EIMD). The purpose of this study was to investigate the efficacy of repeated cold water immersion (CWI) on recovery following a simulated rugby union match. Sixteen male, club level rugby players were matched for body mass and randomly assigned to either a CWI group or control (CON) group. Following the simulated rugby match the CWI group underwent 2 x 5 min immersions at a temperature of 10°C separated by 2.5 min seated at room temperature, whilst the CON group remained seated for 15 min...
September 6, 2017: Journal of Strength and Conditioning Research
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