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https://www.readbyqxmd.com/read/28543819/classifying-trunk-strength-impairment-according-to-the-activity-limitation-caused-in-wheelchair-rugby-performance
#1
Viola C Altmann, Brenda E Groen, Anne L Hart, Yves C Vanlandewijck, Noël L W Keijsers
International Federations in Paralympic sport should develop evidence based classification, based on the relative strength of association between impairment and activities that determine sport specific performance. The purpose of the current study was to assess the relationship between trunk strength impairment and three activities that determine performance in Wheelchair Rugby, and to determine whether this relationship supports the concept of "natural classes". Trunk muscle strength and three determinants of performance were assessed in 27 athletes The correlations between lateral trunk muscle strength and the determinant tilting the chair, and between forward trunk muscle strength and the determinants 1 m acceleration and sprint momentum were calculated...
May 24, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28543710/presentation-diagnosis-and-management-of-popliteal-artery-entrapment-syndrome-11-years-of-experience-with-61-legs
#2
Luc Corneloup, Claude Labanère, Laurent Chevalier, Jérémie Jaussaud, Aude Mignot, Laurent Gencel, Olivier Corneloup, Dominique Midy
BACKGROUND: Popliteal Artery Entrapment Syndrome (PAES) is still underdiagnosed yet it may significantly interfere with lifestyle, especially among young sportspeople, with symptoms like intermittent claudication. While case reports and small case series are sometimes published, studies with larger populations are quite rare. METHODS: This study summarizes our experience with PAES on 61 limbs (35 patients) over a period of 11 years, describing the demographics, the disease and the diagnostic and therapeutic methods used with PAES patients...
May 19, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28542091/normative-data-for-critical-speed-and-d-for-high-level-male-rugby-players
#3
Mark Kramer, Ida E Clark, Nick Jamnick, Cody Strom, Robert W Pettitt
The critical speed (CS) concept helps characterize the aerobic and anaerobic fitness of an athlete. Rugby players should hypothetically have modest CS values but extremely high curvature constant (D') values, yet, normative data are currently unavailable. To develop normative data of CS and D' for high-level male rugby players, a total of 30 male rugby players, were recruited from the Eastern Cape of South Africa. All subjects performed the running 3-min all-out exercise test (3 MT) using global positioning system (GPS) technology to determine CS and D'...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538293/comparison-of-strength-levels-between-players-from-within-the-same-club-who-were-selected-vs-not-selected-to-play-in-the-grand-final-of-the-national-rugby-league-competition
#4
Daniel G Baker
Baker, DG. Comparison of strength levels between players from within the same club that were selected vs. not selected to play in the grand final of the National Rugby League competition. J Strength Cond Res 31(6): 1461-1467, 2017-A number of studies have established that higher levels of strength and power, tested at the end of the preseason, distinguish between playing level in professional rugby league. How this may impact the ability of players to get selected for final payoff games some 30 weeks later has not been fully investigated...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28530487/effects-of-pre-season-training-on-the-sleep-characteristics-of-professional-rugby-league-players
#5
Heidi R Thornton, Jace A Delaney, Grant M Duthie, Ben J Dascombe
PURPOSE: To investigate the influence of daily and exponentially-weighted moving training loads on subsequent night-time sleep. METHODS: Sleep of fourteen professional rugby league athletes competing in the National Rugby League competition was recorded using wristwatch actigraphy. Physical demands were quantified using GPS technology, including total distance (TD), high-speed distance (HSD), acceleration/deceleration load (SumAccDec; AU), and sRPE (AU). Linear mixed models determined effects of acute (daily) and sub-acute (three- and seven-day) exponentially-weighted moving averages (EWMA) on sleep...
May 22, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28530452/overground-propulsion-kinematics-and-acceleration-in-elite-wheelchair-rugby
#6
David S Haydon, Ross A Pinder, Paul N Grimshaw, William S P Robertson
PURPOSE: Maximal acceleration from standstill has been identified as a key performance indicator in wheelchair rugby; however, the impact of classification and kinematic variables on performance has received limited attention. This study aimed to investigate kinematic variables during maximal acceleration, with level of activity limitation accounted for using sport classification scores. METHODS: 25 elite wheelchair rugby players were analysed in high-, mid-, and low-point groups based on their sporting classification score, which reflects the combined trunk, arm, and hand function, before completing five 5m sprints from a stationary position...
May 22, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28530450/the-dose-response-relationship-between-training-load-and-aerobic-fitness-in-academy-rugby-union-players
#7
Richard Taylor, Dajo Sanders, Tony Myers, Grant Abt, Celia A Taylor, Ibrahim Akubat
PURPOSE: The aim of this study was to identify the dose-response relationship between measures of training load (TL) and changes in aerobic fitness in academy rugby union players. METHODS: Training data from ten academy rugby union players was collected during a six-week in-season period. Participants completed a lactate threshold (LT) test which was used to assess VO2max and velocities at VO2max, 2 mmol·L(-1) (vLT) and 4 mmol·L(-1) (vOBLA) as measures of aerobic fitness...
May 22, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28525884/training-volume-and-soft-tissue-injury-in-professional-and-non-professional-rugby-union-players-a-systematic-review
#8
Shane Ball, Mark Halaki, Rhonda Orr
AIM: To investigate the relationship between training volume and soft tissue injury incidence, and characterise soft tissue injury in rugby union players. DESIGN: A systematic search of electronic databases was performed. The search strategy combined terms covering: training volume and injury, and rugby union, and players of all levels. DATA SOURCES: Medline, SPORTDiscus, Web of Science, Embase, PubMed. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Studies were included if they reported: male rugby union players, a clear definition of a rugby union injury, the amount of training volume undertaken by participants, and epidemiological data for soft-tissue injuries including the number or incidence...
October 8, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28521375/a-genetic-marker-associated-with-shoulder-dislocation
#9
Stuart Kim, John P Kleimeyer, Marwa A Ahmed, Andy L Avins, Michael Fredericson, Jason L Dragoo, John P A Ioannidis
Shoulder dislocations are common shoulder injuries associated with athletic activity in contact sports, such as football, rugby, wrestling, and hockey. Identifying genetic loci associated with shoulder dislocation could shed light on underlying mechanisms for injury and identify predictive genetic markers. To identify DNA polymorphisms associated with shoulder dislocation, a genome-wide association screen was performed using publically available data from the Research Program in Genes, Environment and Health including 662 cases of shoulder dislocation and 82 602 controls from the European ancestry group...
May 18, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28515056/reducing-musculoskeletal-injury-and-concussion-risk-in-schoolboy-rugby-players-with-a-pre-activity-movement-control-exercise-programme-a-cluster-randomised-controlled-trial
#10
Michael D Hislop, Keith A Stokes, Sean Williams, Carly D McKay, Mike E England, Simon P T Kemp, Grant Trewartha
BACKGROUND: Injury risk in youth rugby has received much attention, highlighting the importance of establishing evidence-based injury reduction strategies. AIM: To determine the efficacy of a movement control exercise programme in reducing injuries in youth rugby players and to investigate the effect of programme dose on injury measures. METHODS: In a cluster-randomised controlled trial, 40 independent schools (118 teams, 3188 players aged 14-18 years) were allocated to receive either the intervention or a reference programme, both of which were to be delivered by school coaches...
May 17, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28514202/the-physical-characteristics-of-match-play-in-english-schoolboy-and-academy-rugby-union
#11
Dale B Read, Ben Jones, Padraic J Phibbs, Gregory A B Roe, Joshua Darrall-Jones, Jonathon J S Weakley, Kevin Till
The aim was to compare the physical characteristics of under-18 academy and schoolboy rugby union competition by position (forwards and backs). Using a microsensor unit, match characteristics were recorded in 66 players. Locomotor characteristics were assessed by maximum sprint speed (MSS) and total, walking, jogging, striding and sprinting distances. The slow component (<2 m · s(-1)) of PlayerLoad(TM) (PLslow), which is the accumulated accelerations from the three axes of movement, was analysed as a measure of low-speed activity (e...
May 17, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28510582/the-worst-case-scenario-locomotor-and-collision-demands-of-the-longest-periods-of-gameplay-in-professional-rugby-union
#12
Cillian Reardon, Daniel P Tobin, Peter Tierney, Eamonn Delahunt
A number of studies have used global positioning systems (GPS) to report on positional differences in the physical game demands of rugby union both on an average and singular bout basis. However, the ability of these studies to report quantitative data is limited by a lack of validation of certain aspects of measurement by GPS micro-technology. Furthermore no study has analyzed the positional physical demands of the longest bouts of ball-in-play time in rugby union. The aim of the present study is to compare the demands of the single longest period of ball-in-play, termed "worst case scenario" (WCS) between positional groups, which have previously been reported to have distinguishable game demands...
2017: PloS One
https://www.readbyqxmd.com/read/28510267/the-jack-wills-crowd-towards-a-sociology-of-an-elite-subculture
#13
Anthony King, Daniel Smith
British sociologists have long been interested in youth sub-cultures. However British sociologists have tended to focus on working class subcultures and avoided engagement with exclusive sub-cultures of elite social groups. This article seeks to attend to this gap by examining the subculture of a British elite: ex-public school students at select universities in the UK in the twenty-first century. This group consists of a relatively small group of young adults, aged between 18 and 23, who attended public schools, especially one of the nine Clarendon schools (Eton, Winchester, Westminster, St...
May 16, 2017: British Journal of Sociology
https://www.readbyqxmd.com/read/28508888/association-among-practice-frequency-on-depression-and-stress-among-competitive-us-male-wheelchair-rugby-athletes-with-tetraplegia
#14
S L Silveira, T Ledoux, M Cottingham, D C Hernandez
STUDY DESIGN: Cross-sectional. OBJECTIVES: To determine whether frequency of training is related to self-reported lower psychological distress, defined as depressive symptomology and perceived stress, among the US male wheelchair rugby athletes with tetraplegia. SETTING: United States. METHODS: Survey data were collected on a convenience sample at wheelchair rugby tournaments from January-April 2016. Participants self-reported depressive symptomology (CES-D-10), perceived stress scale (PSS), and frequency of rugby practice...
May 16, 2017: Spinal Cord
https://www.readbyqxmd.com/read/28508338/fluid-balance-in-team-sport-athletes-and-the-effect-of-hypohydration-on-cognitive-technical-and-physical-performance
#15
REVIEW
Ryan P Nuccio, Kelly A Barnes, James M Carter, Lindsay B Baker
Sweat losses in team sports can be significant due to repeated bursts of high-intensity activity, as well as the large body size of athletes, equipment and uniform requirements, and environmental heat stress often present during training and competition. In this paper we aimed to: (1) describe sweat losses and fluid balance changes reported in team sport athletes, (2) review the literature assessing the impact of hypohydration on cognitive, technical, and physical performance in sports-specific studies, (3) briefly review the potential mechanisms by which hypohydration may impact team sport performance, and (4) discuss considerations for future directions...
May 15, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28498716/chronotype-distribution-in-professional-rugby-players-evidence-for-the-environment-hypothesis
#16
Lovemore Kunorozva, Dale E Rae, Laura C Roden
Individual sport athletes have been shown to comprise unusually high proportions of morning-types (MTs) coupled with a higher prevalence of the morningness-associated PERIOD3 variable number tandem repeat (VNTR) allele, PER3(5). The degree to which type of sport selected is influenced by either chronotype or genotype, or the extent to which sporting environment contributes to chronotype is unclear. The aim of this study was to assess chronotype and PER3 VNTR polymorphism frequencies in team sport players and non-athletic controls...
May 12, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28481676/technical-determinants-of-tackle-and-ruck-performance-in-international-rugby-union
#17
Sharief Hendricks, Tiffany van Niekerk, Drew Wade Sin, Mike Lambert, Steve den Hollander, James Brown, Willie Maree, Paul Treu, Kevin Till, Ben Jones
The most frequently occurring contact events in rugby union are the tackle and ruck. The ability repeatedly to engage and win the tackle and ruck has been associated with team success. To win the tackle and ruck, players have to perform specific techniques. These techniques have not been studied at the highest level of rugby union. Therefore, the purpose of this study was to identify technical determinants of tackle and ruck performance at the highest level of rugby union. A total of 4479 tackle and 2914 ruck events were coded for the Six Nations and Championship competitions...
May 8, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28480685/hormonal-responses-to-a-rugby-match-a-brief-review
#18
Maamer Slimani, Foued Cheour, Wassim Moalla, Julien S Baker
BACKGROUND: Rugby is an intermittent team sport, commonly stressing the endocrine system by physiological efforts. However, no review has synthesized the available literature on the hormonal responses to a rugby match. The purpose of this review was to examine the hormonal responses to a rugby match. Mediator and moderator variables for the rugby match- hormonal responses relationship were also discussed. METHODS: The systematic search was conducted using different databases and according to the Population/Intervention or Exposure/Comparison/Outcome(s) [PICO] criteria...
May 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28479281/explaining-match-outcome-and-ladder-position-in-the-national-rugby-league-using-team-performance-indicators
#19
Carl T Woods, Wade Sinclair, Sam Robertson
OBJECTIVES: To examine the extent at which match outcome and ladder position could be explained using team performance indicators in the National Rugby League (NRL). METHODS: The dataset consisted of 13 performance indicators acquired from each NRL team across the 2016 season (n=376 observations). Data was sorted according to apriori match outcome (win/loss) and ladder position (one to 16). Given the binary and categorical nature of the response variables, two analysis approaches were used; a conditional interference classification tree and ordinal regression...
April 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28476897/dr-matthew-cross-epidemiology-and-risk-factors-for-injury-in-professional-rugby-union
#20
Matthew J Cross
No abstract text is available yet for this article.
May 5, 2017: British Journal of Sports Medicine
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