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https://www.readbyqxmd.com/read/28098055/nonsurgical-treatment-of-mason-type-ii-radial-head-fractures-in-athletes-a-retrospective-study
#1
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
https://www.readbyqxmd.com/read/28096246/chronic-traumatic-encephalopathy-is-latency-in-symptom-onset-explained-by-tau-propagation
#2
Joshua Kriegel, Zachary Papadopoulos, Ann C McKee
Chronic traumatic encephalopathy (CTE) is a neurodegenerative tauopathy associated with repetitive mild brain trauma. CTE, previously termed "dementia pugilistica," has been identified in American football, ice hockey, baseball, rugby and soccer players, boxers, wrestlers, and military personnel exposed to blast and other traumatic brain injuries. There is often a long latency period between an individual's exposure to repetitive brain trauma and the clinical symptoms of CTE. The pathology of CTE is characterized by a progression from isolated focal perivascular hyperphosphorylated tau lesions in the cerebral cortex to a widespread tauopathy that involves diffuse cortical and medial temporal lobe regions...
January 17, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28095070/player-responses-to-match-and-training-demands-during-an-intensified-fixture-schedule-in-professional-rugby-league-a-case-study
#3
Craig Twist, Jamie Highton, Matthew Daniels, Nathan Mill, Graeme Close
Player loads and fatigue responses were reported in 15 professional rugby league players (24.3 ± 3.8 y) during a period of intensified fixtures. Repeated measures of internal and external loads, perceived wellbeing and jump flight time were recorded across 22 days, comprising nine training sessions and matches on days 5, 12, 15 and 21 (player exposure: 3.6 ± 0.6 matches). Mean training load (session RPE x duration) between matches was 1177, 1083, 103, and 650 AU, respectively. Relative distance in Match 1 (82 m/min) and Match 4 (79 m/min) was very likely lower in Match 2 (76 m/min) and likely higher in Match 3 (86 m/min)...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28081555/new-zealand-rugby-health-study-motor-cortex-excitability-in-retired-elite-and-community-level-rugby-players
#4
Gwyn N Lewis, Patria A Hume, Verna Stavric, Scott R Brown, Denise Taylor
AIMS: Rugby union is a high contact sport in which players frequently experience brain injuries. Acute brain injury is associated with altered corticomotor function. However, it is uncertain if long-term exposure to rugby is associated with any alterations in corticomotor function. The aim of the study was to assess measures of corticomotor excitability and inhibition in retired rugby players in comparison to retired non-contact sport players. METHODS: The design was a cross-sectional study with three groups of retired athletes: elite rugby (n=23), community level rugby (n=28) and non-contact sport control (n=22)...
January 13, 2017: New Zealand Medical Journal
https://www.readbyqxmd.com/read/28065448/left-ventricular-dyssynchrony-and-2d-and-3d-global-longitudinal-strain-for-differentiating-physiological-and-pathological-left-ventricular-hypertrophy
#5
Julien Ternacle, Camille Bremont, Thomas d'Humieres, Laureline Faivre, Huy Long Doan, Romain Gallet, Leopold Oliver, Jean-Luc Dubois-Randé, Pascal Lim
BACKGROUND: Diagnosis of hypertrophic cardiomyopathy (HCM) in athletes can be challenging. AIMS: To ascertain parameters that differentiate patients with HCM from athletes with moderate left ventricular (LV) hypertrophy (LVH 13-15mm). METHODS: We retrospectively included 100 men: 50 elite rugby players (25 with moderate LVH and 25 with no LVH), 25 patients with HCM and moderate LVH and 25 controls. LV dyssynchrony was defined as the standard deviation of time to peak 2D longitudinal strain (16-segment model) and global strain components were computed from two- (2D) and three-dimensional (3D) speckle tracking...
January 3, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/28052130/cervical-spine-injuries-a-whole-body-musculoskeletal-model-for-the-analysis-of-spinal-loading
#6
Dario Cazzola, Timothy P Holsgrove, Ezio Preatoni, Harinderjit S Gill, Grant Trewartha
Cervical spine trauma from sport or traffic collisions can have devastating consequences for individuals and a high societal cost. The precise mechanisms of such injuries are still unknown as investigation is hampered by the difficulty in experimentally replicating the conditions under which these injuries occur. We harness the benefits of computer simulation to report on the creation and validation of i) a generic musculoskeletal model (MASI) for the analyses of cervical spine loading in healthy subjects, and ii) a population-specific version of the model (Rugby Model), for investigating cervical spine injury mechanisms during rugby activities...
2017: PloS One
https://www.readbyqxmd.com/read/28045340/the-sensitivity-of-the-alternative-maximal-accumulated-oxygen-deficit-method-to-discriminate-training-status
#7
Alessandro M Zagatto, Fabio Y Nakamura, Fabio Milioni, Willian E Miyagi, Rodrigo A B de Poli, Johnny Padulo, Nicola L Bragazzi, Marcelo Papoti
The purpose of the study was to investigate the sensitivity of an alternative maximal accumulated oxygen deficit (MAODALT) method to discriminate the "anaerobic" capacity while comparing: least trained (LT) participants (n = 12), moderately trained (MT) participants (n = 12), endurance trained (ET) participants (n = 16), and rugby (RG) players (n = 11). Participants underwent a graded exercise test on a treadmill and a supramaximal effort for assessing MAODALT. MAODALT was calculated as the sum of oxygen equivalents from the phosphagen and glycolytic metabolic pathways...
January 3, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28039125/mechanisms-of-acl-injury-in-professional-rugby-union-a-systematic-video-analysis-of-36-cases
#8
Connor Montgomery, Jeff Blackburn, Daniel Withers, Gregory Tierney, Cathal Moran, Ciaran Simms
BACKGROUND: The mechanisms of ACL injury in rugby are not well defined. AIM: To describe the mechanisms of ACL injury in male professional rugby players using systematic video analysis. METHODS: 36 cases from games played in top professional leagues and international matches were analysed. 5 analysts independently assessed all videos to record the estimated frame/time of initial ground contact, frame/time of ACL tear and a range of play specific variables...
December 30, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28033124/variances-in-strength-and-conditioning-practice-in-elite-rugby-union-between-the-northern-and-southern-hemispheres
#9
Thomas W Jones, Andrew Smith, Lindsay S Macnaughton, Duncan N French
The strength and conditioning (S&C) practices in elite Rugby Union (RU) have previously been detailed. There is also research which indicates playing styles can differ between Northern hemisphere (NH) and Southern hemisphere (SH) teams. It is not presently known if these variances in playing styles are reflected in the S&C practices of those supporting NH and SH teams. As such, the present study examines any variances in S&C practices between those supporting NH and SH elite level teams. A validated questionnaire was employed that comprised 7 sections; personal details, physical testing, strength and power development, concurrent training, unique aspects of the programme and any further relevant information regarding prescribed training programmes...
December 20, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28031755/performance-effects-of-repetition-specific-gluteal-activation-protocols-on-acceleration-in-male-rugby-union-players
#10
Lorna Barry, Ian Kenny, Thomas Comyns
Warm-up protocols have the potential to cause an acute enhancement of dynamic sprinting performance. The purpose of this study was to evaluate the effects of three repetition specific gluteal activation warm-up protocols on acceleration performance in male rugby union players. Forty male academy rugby union players were randomly assigned to one of 4 groups (control, 5, 10 or 15 repetition gluteal activation group) and performed 10 m sprints at baseline and 30 s, 2, 4, 6 and 8 min after their specific intervention protocol...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28028894/attacking-22-entries-in-rugby-union-running-demands-and-differences-between-successful-and-unsuccessful-entries
#11
P Tierney, D P Tobin, C Blake, E Delahunt
Global Positioning System (GPS) technology is commonly utilized in team sports, including rugby union. It has been used to describe the average running demands of rugby union. This has afforded an enhanced understanding of the physical fitness requirements for players. However, research in team sports has suggested that training players relative to average demands may underprepare them for certain scenarios within the game. To date, no research has investigated the running demands of attacking 22 entries in rugby union...
December 28, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28019721/the-effect-of-deprivation-on-the-developmental-activities-of-adolescent-rugby-union-players-in-wales
#12
Charles O N Winn, Paul R Ford, Melitta A McNarry, Jason Lewis, Gareth Stratton
The developmental activities of rugby union players and their interaction with deprivation remain to be elucidated. Five-hundred and ninety elite junior rugby union players (14.8 ± 0.5 years) were split into deprivation quintiles. These players subsequently completed a participant history questionnaire to record their involvement in rugby and other sports. Players accumulated 1987 ± 1297 h in rugby between 6 and 15 years of age. During the mini rugby stage (6-10 years of age), players accumulated an average of 113 ± 105, 89 ± 69 and 43 ± 19 h per year in rugby play, practice and competition, respectively...
December 26, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28002181/effects-of-caffeine-ingestion-on-skill-performance-during-an-international-female-rugby-sevens-competition
#13
Javier Portillo, Juan Del Coso, Javier Abián-Vicén
The aim of this study was to establish the effects of a caffeine-containing energy drink on skills and technical performance during a match in female elite rugby sevens players. On two non-consecutive days of a friendly tournament, sixteen women from the Spanish national rugby-sevens team (mean age = 23±2 yr) ingested 3 mg of caffeine per kg of body mass in the form of an energy drink or the same drink without caffeine (placebo drink). After sixty minutes for caffeine absorption, participants played three rugby sevens matches against another national team...
December 8, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28002178/effect-of-different-onset-thresholds-on-isometric-mid-thigh-pull-force-time-variables
#14
Thomas Dos'Santos, Paul A Jones, Paul Comfort, Christopher Thomas
Various thresholds have been used to identify the onset of contraction during isometric mid-thigh pull (IMTP) however, no agreed onset threshold exists for this assessment. The purpose of this study was to compare relative body weight (BW) and arbitrary onset thresholds to a criterion onset threshold 5 SD of BW for IMTP force-time variables; force at each threshold, peak force (PF), time-specific force values (100, 150 and 200 ms) and rate of force development (RFD) during 0-100 ms, 0-150 ms, 0-200 ms. Academy rugby league players (n = 9, age: 18...
December 8, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28000283/maturational-and-social-factors-contributing-to-relative-age-effects-in-school-sports-data-from-the-london-youth-games
#15
K E Reed, D A Parry, G R H Sandercock
Few studies have investigated whether relative age effects (RAEs) exist in school sport. None have sought to test the competing maturational and social-agent hypotheses proposed to explain the RAE. We aimed to determine the presence of RAEs in multiple school sports and examine the contribution of maturational and social factors in commonplace school sports. We analyzed birth dates of n=10645 competitors (11-18 years) in the 2013 London Youth Games annual inter-school multisport competition and calculated odds ratio (OR) for students competing based on their yearly birth quarter (Q1-Q4)...
December 20, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27998205/2015-parapan-american-games-autonomic-function-but-not-physical-activity-is-associated-with-vascular-cognitive-impairment-in-spinal-cord-injury
#16
Aaron A Phillips, Jordan W Squair, Katharine Dianne Currie, Shieak Tzeng, Phil Ainslie, Andrei V Krassioukov
Autonomic dysfunction and diminished capacity for physical exercise are commonly implicated in the 3-4 fold increased risk of cerebrovascular disease after spinal cord injury (SCI). We assessed cerebrovascular function [transcranial Doppler; neurovascular coupling (NVC) and cerebral pressure-flow regulation] in elite national level wheelchair rugby players (n=23), normally active SCI individuals (n=12), and able-bodied controls (n=13). Cognitive (Stroop) and autonomic function (postural change) was also evaluated...
December 21, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27990222/spatial-awareness-is-related-to-moderate-intensity-running-during-a-collegiate-rugby-match
#17
Kyle S Beyer, David H Fukuda, Amelia M Miramonti, Mattan W Hoffman, Ran Wang, Michael B LA Monica, Josh J Riffe, Satoru Tanigawa, Jeffrey R Stout, Jay R Hoffman
The purpose of the present study was to evaluate the relationship between spatial awareness, agility, and distance covered in global positioning system (GPS) derived velocity zone classifications during a collegiate rugby match. Twelve American collegiate rugby union players (mean±SD; age: 21.2±1.4 y; weight: 85.0±16.0 kg; 7 forwards & 5 backs) on a single team volunteered to participate in this investigation. The distances travelled at low (walking/jogging; <2.7m/s), moderate (cruising/striding; 2.7-5...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27967337/peak-running-intensity-of-international-rugby-implications-for-training-prescription
#18
Jace A Delaney, Heidi R Thornton, John F Pryor, Andrew M Stewart, Ben J Dascombe, Grant M Duthie
PURPOSE: To quantify the duration and position-specific peak running intensities of international rugby union, for the prescription and monitoring of specific training methodologies. METHODS: Global positioning systems (GPS) were used to assess the activity profile of 67 elite-level rugby union players from two separate nations, across 33 international matches. A moving average approach was used to identify the peak relative distance (m∙min(-1)), average acceleration/deceleration (AveAcc; m∙s(-2)) and average metabolic power (Pmet) for a range of durations (1-10 min)...
December 14, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27967276/the-impact-of-an-assistive-pole-seat-configuration-and-strength-in-paralympic-seated-throwing
#19
Alysha Hyde, Luke Hogarth, Mark Sayers, Emma Beckman, Mark J Connick, Sean Tweedy, Brendan Burkett
PURPOSE: This study quantified the influence of (i) the assistive pole, (ii) seat configuration, and (iii) upper-body and trunk strength, on seated throwing performance in athletes with a spinal cord injury. METHODS: Ten Paralympic athletes competing in wheelchair rugby, wheelchair basketball or athletics (seated throws) participated in two randomised sessions; seated throwing and strength tests. Participants threw a club from a custom-built throwing chair, with and without a pole...
December 14, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27951526/long-term-health-outcomes-after-exposure-to-repeated-concussion-in-elite-level-rugby-union-players
#20
T M McMillan, P McSkimming, J Wainman-Lefley, L M Maclean, J Hay, A McConnachie, W Stewart
BACKGROUND: There is continuing concern about effects of concussion in athletes, including risk of the neurodegenerative disease chronic traumatic encephalopathy. However, information on long-term health and wellbeing in former athletes is limited. METHOD: Outcome after exposure to repeated brain injury was investigated in 52 retired male Scottish international rugby players (RIRP) and 29 male controls who were similar in age and social deprivation. Assessment included history of playing rugby and traumatic brain injury, general and mental health, life stress, concussion symptoms, cognitive function, disability and markers of chronic stress (allostatic load)...
October 7, 2016: Journal of Neurology, Neurosurgery, and Psychiatry
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