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Rugby union

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https://www.readbyqxmd.com/read/28287036/collective-effectiveness-in-the-xv-de-france-selections-and-time-matter
#1
Adrien Sedeaud, Guillaume Saulière, Laurie-Anne Marquet, Scott Del Vecchio, Avner Bar-Hen, Jean-François Toussaint
The aim of this study was to quantify the impact of selections and shared selections in the rugby union. Players' names, positions, and number of selections were collected for all XV de France's games (1906-2014). Every team's percentage of renewal of workforce was calculated for backs and forwards. During the 1987-2014 period, all second row forwards (locks), halfbacks, and centres' shared selections (number of times when two players have competed together) were recreated. The Best vs. Rest method was applied to these remodelled dyads...
March 13, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28282758/the-effects-of-barbell-load-on-countermovement-vertical-jump-power-and-net-impulse
#2
Peter D Mundy, Neal A Smith, Mike A Lauder, Jason P Lake
The aim of this study was to examine the effects of barbell load on countermovement vertical jump (CMJ) power and net impulse within a theoretically valid framework, cognisant of the underpinning force, temporal, and spatial components. A total of 24 resistance-trained rugby union athletes (average ± SD: age: 23.1 ± 3.4 years; height: 1.83 ± 0.05 m; body mass (BM): 91.3 ± 10.5 kg) performed maximal CMJ under 5 experimental conditions in a randomised, counterbalanced order: unloaded, and with additional loads of 25%, 50%, 75%, and 100% of BM...
September 26, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28276911/the-effect-of-physical-contact-on-changes-in-fatigue-markers-following-rugby-union-field-based-training
#3
Gregory Roe, Joshua Darrall-Jones, Kevin Till, Padraic Phibbs, Dale Read, Jonathon Weakley, Andrew Rock, Ben Jones
Repeated physical contact in rugby union is thought to contribute to post-match fatigue; however, no evidence exists on the effect of contact activity during field-based training on fatigue responses. Therefore, the purpose of this study was to examine the effect of contact during training on fatigue markers in rugby union players. Twenty academy rugby union players participated in the cross-over study. The magnitude of change in upper- and lower-body neuromuscular function (NMF), whole blood creatine kinase concentration [CK] and perception of well-being was assessed pre-training (baseline), immediately and 24 h post-training following contact and non-contact, field-based training...
February 26, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28259848/calf-muscle-strain-injuries-in-sport-a-systematic-review-of-risk-factors-for-injury
#4
REVIEW
Brady Green, Tania Pizzari
OBJECTIVE: To systematically review the literature to identify risk factors for calf strain injury, and to direct future research into calf muscle injuries. DESIGN: Systematic review DATA SOURCES: Database searches conducted for Medline, CINAHL, EMBASE, AMED, AUSPORT, SportDiscus, PEDro and Cochrane Library. Manual reference checks, ahead of press searches, citation tracking. From inception to June 2016. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Studies evaluating and presenting data related to intrinsic or extrinsic risk factors for sustaining future calf injury...
March 4, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28259770/a-prospective-investigation-of-changes-in-the-sensorimotor-system-following-sports-concussion-an-exploratory-study
#5
Julie A Hides, Melinda M Franettovich Smith, M Dilani Mendis, Nigel A Smith, Andrew J Cooper, Julia Treleaven, Felix Leung, Andrew J Gardner, Paul McCrory, Nancy L Low Choy
BACKGROUND: Sports concussion is a risk for players involved in high impact, collision sports. Post-concussion, the majority of symptoms subside within 7-10 days, but can persist in 10-20% of athletes. Understanding the effects of sports concussion on sensorimotor systems could inform physiotherapy treatment. OBJECTIVE: To explore changes in sensorimotor function in the acute phase following sports concussion. DESIGN: Prospective cohort study...
February 24, 2017: Musculoskelet Sci Pract
https://www.readbyqxmd.com/read/28258820/the-king-devick-k-d-test-and-concussion-diagnosis-in-semi-professional-rugby-union-players
#6
John H Molloy, Ian Murphy, Conor Gissane
OBJECTIVES: To determine the utility of the King-Devick (K-D) test in identifying sports-related concussion in semi-professional rugby players. DESIGN: Descriptive cohort study. METHODS: 176 male players were recruited from a semi-professional rugby union competition in New Zealand (NZ). Baseline K-D scores were obtained in the pre-season. Post-match K-D and Pitch Side Concussion Assessment Version 2 (PSCA2) scores were obtained in those with suspected concussion...
February 28, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28249857/application-of-the-subsequent-injury-categorisation-model-for-longitudinal-injury-surveillance-in-elite-rugby-and-cricket-intersport-comparisons-and-inter-rater-reliability-of-coding
#7
Isabel S Moore, Stephen Mount, Prabhat Mathema, Craig Ranson
BACKGROUND: When an athlete has more than one injury over a time period, it is important to determine if these are related to each other or not. The subsequent injury categorisation (SIC) model is a method designed to consider the relationship between an index injury and subsequent injury(ies). OBJECTIVE: The primary aim was to apply SIC to longitudinal injury data from two team sports: rugby union and cricket. The secondary aim was to determine SIC inter-rater reliability...
March 1, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28247331/exercise-based-interventions-for-injury-prevention-in-tackle-collision-ball-sports-a-systematic-review
#8
REVIEW
Nicola Sewry, Evert Verhagen, Mike Lambert, Willem van Mechelen, Wayne Viljoen, Clint Readhead, James Brown
BACKGROUND: The injury burden in collision sports is relatively high compared to other team sports. Therefore, participants in these sports would benefit by having effective injury prevention programs. Exercise-based interventions have successfully reduced injuries in soccer, but evidence on exercise-based interventions in tackle collision sports is limited. OBJECTIVE: The objective of this review is to systematically examine the evidence of exercise-based intervention programs reducing injuries in tackle collision sports...
February 28, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28240715/influence-of-environmental-conditions-on-performance-and-heart-rate-responses-to-the-30-15-incremental-fitness-test-in-rugby-union-athletes
#9
Thomas W Jones, Alex O W Natera, Jacob Jennings, Aiden J Oakley
The purpose of this study was to examine the differences in performance and heart rate responses between a high heat outdoor condition (34.0°C, 64.1% humidity) and a temperate indoor condition (22.0°C, 50.0% humidity) during the 30-15 intermittent fitness test (30-15IFT). Eight highly trained Rugby Union players (28.1 ± 1.5 years, 181.4 ± 8.8 cm, 88.4 ± 13.3kg) completed the 30-15IFT in two different temperature conditions. Dependant variables recorded and analysed included; final running speed of the 30-15IFT, heart rate (HR) at rest (HR rest), maximum HR (Max HR), HR recovery (HRR), average HR (HR ave) and sub-maximal HR corresponding to 25%, 50% and 75% of final test speed (HR 25%, HR 50% and HR 75%) and HR at 13 km·h (HR 13 km·h)...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28195971/preseason-functional-movement-screen%C3%A2-predicts-risk-of-time-loss-injury-in-experienced-male-rugby-union-athletes
#10
Sean R Duke, Steve E Martin, Catherine A Gaul
The purpose of this study was to determine the relationship between Functional Movement Screen™ (FMS) score and the risk of time-loss injury in experienced male rugby union athletes. A secondary purpose was to determine the relationship between FMS-determined asymmetries and the risk of time-loss injury in these athletes.FMS scores were collected from male rugby union athletes (n=73) during preseason and half-way through one eight-month season. Time-loss injury data were collected throughout the full season...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28173970/a-comparison-of-catastrophic-injury-incidence-rates-by-provincial-rugby-union-in-south-africa
#11
Marelise Badenhorst, Evert A L M Verhagen, Willem van Mechelen, Michael I Lambert, Wayne Viljoen, Clint Readhead, Gail Baerecke, James C Brown
OBJECTIVES: To compare catastrophic injury rates between the 14 South African Provincial Rugby Unions. DESIGN: A prospective, population-based study conducted among all South African Unions between 2008-2014. METHODS: Player numbers in each Union were obtained from South African Rugby's 2013 Census. Catastrophic injuries were analysed from BokSmart's serious injury database. Incidence rates with 95% Confidence Intervals were calculated. Catastrophic injuries (Acute Spinal Cord Injuries and catastrophic Traumatic Brain Injuries) within Unions were compared statistically, using a Poisson regression with Incidence Rate Ratios (IRR) and a 95% confidence level (p<0...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28169150/no-relationship-exists-between-urinary-nt-probnp-and-gps-technology-in-professional-rugby-union
#12
Angus Lindsay, John G Lewis, Nicholas Gill, Nick Draper, Steven P Gieseg
OBJECTIVES: We investigated the level of cardiovascular stress associated with professional rugby union and whether these changes could be explained through external workload systems like GPS and video analysis. DESIGN: Urine samples (14 in game one and 13 in game two) were collected from professional rugby players before, immediately post- and 36h post-play in two consecutive games. METHODS: Urine was analysed for NT-proBNP by ELISA. Comparison with GPS (player-load and distance covered at specific speed bands) and video analysis (total impacts) were conducted...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28166184/postactivation-potentiation-and-change-of-direction-speed-in-elite-academy-rugby-players
#13
Chris Bishop, Anthony N Turner, Jon Cree, Sean Maloney, James Marshall, Paul Jarvis
This study investigated the effect of preceding pro-agility sprints with maximal isometric squats to determine if postactivation potentiation (PAP) could be harnessed in change of direction speed. Sixteen elite under-17 rugby union players (age: 16 ± 0.41yrs; body mass: 88.7 ± 12.1kg, height: 1.83 ± 0.07m) from an Aviva Premiership rugby club were tested. Subjects performed a change of direction specific warm-up, followed by two baseline pro-agility tests. After 10 minutes recovery, 3 x 3-second maximal isometric squats with a 2 minute recovery between sets were completed as a conditioning activity (CA) on a force plate where peak force and mean rate of force development over 300 milliseconds were measured...
February 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28146395/concussions-and-head-injuries-in-english-community-rugby-union-match-play
#14
Simon P Roberts, Grant Trewartha, Michael England, William Goodison, Keith A Stokes
BACKGROUND: Previous research has described general injury patterns in community-level rugby union, but specific information on time-loss head injuries has not been reported. PURPOSE: To establish the incidence and nature of significant time-loss head injuries in English community rugby match play, and to identify the injury risk for specific contact events. STUDY DESIGN: Descriptive epidemiology study. METHODS: Over 6 seasons, injury information was collected from 46 (2009-2010), 67 (2010-2011), 76 (2011-2012), 50 (2012-2013), 67 (2013-2014), and 58 (2014-2015) English community rugby clubs (Rugby Football Union levels 3-9) over a total of 175,940 hours of player match exposure...
February 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28146030/strength-and-conditioning-practices-in-adolescent-rugby-players-relationship-with-changes-in-physical-qualities
#15
Jonathon J S Weakley, Kevin Till, Joshua Darrall-Jones, Gregory A B Roe, Padraic J Phibbs, Dale Read, Ben L Jones
Adolescent rugby players benefit from the implementation of resistance training. However resistance training practices and how they influence short-term physical change is unknown. Therefore the purpose of this study was to quantify resistance training practices, evaluate physical development, and relate these changes to resistance training variables across 12-weeks in adolescent rugby union players. Thirty-five male adolescent rugby union players participated in the study with subjects completing an anthropometric and physical testing battery pre- and post- a 12-week in-season mesocycle...
January 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28125898/mechanisms-and-factors-associated-with-tackle-related-injuries-in-south-african-youth-rugby-union-players
#16
Nicholas Burger, Mike Ian Lambert, Wayne Viljoen, James Craig Brown, Clint Readhead, Steve den Hollander, Sharief Hendricks
BACKGROUND: The majority of injuries in rugby union occur during tackle events. The mechanisms and causes of these injuries are well established in senior rugby union. PURPOSE: To use information from an injury database and assess video footage of tackle-related injuries in youth rugby union matches to identify environmental factors and mechanisms that are potentially confounding to these injuries. STUDY DESIGN: Descriptive epidemiological study...
February 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28116102/self-determined-motivation-in-rehabilitating-professional-rugby-union-players
#17
Fraser Carson, Remco C J Polman
BACKGROUND: The aim of the present study was to explore the views of professional rugby union players during the early rehabilitation, late rehabilitation and return to play stages, following anterior cruciate ligament (ACL) injury. METHODS: A qualitative dominant, mixed methodological approach was utilized with five players who had suffered an ACL injury requiring reconstructive surgery. A longitudinal approach, concurrent with each player's rehabilitation, consisting of twice monthly interviews, a self-report diary and three established questionnaires (MOS-Social Support Survey, Sherbourne & Stewart, 1991; Sport Climate Questionnaire, Deci & Ryan, n...
2017: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28107556/do-post-concussion-like-symptom-responses-change-following-exercise-or-sports-participation-in-a-non-concussed-cohort
#18
A P Balasundaram, J Athens, A G Schneiders, P McCrory, S J Sullivan
The purposes of this study were (a) to determine the reliable change in post-concussion-like symptoms reported following self-selected exercise or sports activities and (b) to explore the potential influence of gender and exercise parameters on post-concussion-like symptoms reported by a non-concussed cohort following exercise/training. A pre-to-post observational design was used. A convenience sample of students aged 18-30 years who visited a university recreation center to engage in their chosen exercise activity and a purposeful sample of men's and women's rugby union players engaged in their regular training sessions were included in the study...
January 20, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28103813/fat-mass-and-obesity-associated-fto-gene-influences-skeletal-muscle-phenotypes-in-non-resistance-trained-males-and-elite-rugby-playing-position
#19
S M Heffernan, G K Stebbings, L P Kilduff, R M Erskine, S H Day, C I Morse, J S McPhee, C J Cook, B Vance, W J Ribbans, S M Raleigh, C Roberts, M A Bennett, G Wang, M Collins, Y P Pitsiladis, A G Williams
BACKGROUND: FTO gene variants have been associated with obesity phenotypes in sedentary and obese populations, but rarely with skeletal muscle and elite athlete phenotypes. METHODS: In 1089 participants, comprising 530 elite rugby athletes and 559 non-athletes, DNA was collected and genotyped for the FTO rs9939609 variant using real-time PCR. In a subgroup of non-resistance trained individuals (NT; n = 120), we also assessed structural and functional skeletal muscle phenotypes using dual energy x-ray absorptiometry, ultrasound and isokinetic dynamometry...
January 19, 2017: BMC Genetics
https://www.readbyqxmd.com/read/28098055/nonsurgical-treatment-of-mason-type-ii-radial-head-fractures-in-athletes-a-retrospective-study
#20
M Guzzini, A Vadalà, A Agrò, V Di Sanzo, D Pironi, A Redler, P Serlorenzi, L Proietti, C Civitenga, D Mazza, R M Lanzetti, Andrea Ferretti
OBJECTIVE: The best treatment for moderately displaced radial head fractures (Mason type II) still remains controversial. In cases of isolated fractures, there is no evidence that a fragment displacement of ≥ 2 mm gives poor results in conservatively treated fractures. PATIENTS AND METHODS: We retrospectively reviewed 52 patients (31M, 21F) affected by an isolated Mason type II fracture, treated with a long arm cast for two weeks between 2008 and 2013. All patients had practiced sports before being injured...
September 2017: Il Giornale di Chirurgia
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