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https://www.readbyqxmd.com/read/30540281/physical-anthropometric-and-athletic-movement-qualities-discriminate-development-level-in-a-rugby-league-talent-pathway
#1
Leesa A Pearce, Wade H Sinclair, Anthony S Leicht, Carl T Woods
Pearce, LA, Sinclair, WH, Leicht, AS, and Woods, CT. Physical, anthropometric, and athletic movement qualities discriminate development level in a rugby league talent pathway. J Strength Cond Res 32(11): 3169-3176, 2018-This study compared the physical, anthropometric, and athletic movement qualities of talent-identified rugby league (RL) players within a development pathway. From a total of 174 players, 3 developmental levels were defined: under 18 (U18; n = 52), under 20 (U20; n = 53), and state league (SL; n = 69)...
November 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30498576/concussion-in-adolescent-rugby-union-players-comprehensive-acute-assessment-protocol-and-development-of-the-ssc-concussion-passport-to-monitor-long-term-health
#2
REVIEW
Ciaran Cosgrave, Colm Fuller, Andy Franklyn-Miller, Eanna Falvey, Cliff Beirne, John Ryan, Paul McCrory
Introduction: Sports-related concussion (SRC) can be challenging to diagnose, assess and manage. Much of the SRC research is conducted on adults. The assessment of SRC should aim to identify deficits using a detailed multimodal assessment; however, most studies investigating the effects of SRC use diagnostic tools in isolation. It is likely that a combination of diagnostic tests will improve diagnostic accuracy. In this study, we aim to investigate how concussion affects adolescent rugby players and how a variety of diagnostic tools interact with each other as participants recover from their injury...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/30479532/heart-rate-index-estimates-oxygen-uptake-energy-expenditure-and-aerobic-fitness-in-rugby-players
#3
Alessandro L Colosio, Anna Pedrinolla, Giorgio Da Lozzo, Silvia Pogliaghi
The purpose of the study was to verify the suitability of heart rate-index (HRindex ) in predicting submaximal oxygen consumption ( V O2 ), energy expenditure (EE) and maximal oxygen consumption ( V O2max ) during treadmill running in rugby players. Fifteen professional rugby players (99.8 ± 12.7 kg, 1.85 ± 0.09 m) performed a running incremental test while V O2 ( breath-by-breath) and heart rate (HR) were measured. HRindex was calculated (actual HR/resting HR) to predict submaximal and maximal V O2 ({[(HRindex x 6)-5...
December 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/30458016/logical-validation-and-evaluation-of-practical-feasibility-for-the-scrum-school-clinical-rugby-measure-test-battery-developed-for-young-adolescent-rugby-players-in-a-resource-constrained-environment
#4
Matthew Chiwaridzo, Danai Chandahwa, Sander Oorschot, Cathrine Tadyanemhandu, Jermaine M Dambi, Gillian Ferguson, Bouwien C M Smits-Engelsman
There is a growing impetus towards usage of test batteries in talent identification (TID) programmes in rugby. Consequently, there are many test batteries in existence profiling anthropometric, physiological characteristics and rugby-specific skills. There is no consensus in the literature on the constituent variables and corresponding tests required to inform TID programs. Following development of a new test battery called the SCRuM (School Clinical Rugby Measure), this study aimed at establishing face, logical validity and practical feasibility of included tests...
2018: PloS One
https://www.readbyqxmd.com/read/30427241/understanding-the-impact-of-trunk-and-arm-impairment-on-wheelchair-rugby-performance-during-competition
#5
Barry S Mason, Viola C Altmann, Victoria L Goosey-Tolfrey
PURPOSE: To determine the effect of trunk and arm impairment on physical and technical performance during wheelchair rugby (WR) competition. METHODS: Thirty-one highly trained WR players grouped according to their trunk (no trunk [NT]; some trunk [T] function) and arm impairment (poor [PAF]; moderate [MAF]; good [GAF] arm function) participated in 5 WR matches. Player's physical (wheelchair mobility) and technical (ball handling) activities were analysed using an indoor tracking system and video analysis respectively...
November 14, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/30409072/changes-in-mechanical-properties-of-sprinting-during-repeated-sprint-in-elite-rugby-sevens-athletes
#6
Pedro Jiménez-Reyes, Matt Cross, Alex Ross, Pierre Samozino, Matt Brughelli, Nicholas Gill, Jean-Benoît Morin
This study aimed to analyse fatigue-induced changes in mechanical sprinting properties during a specific repeated-sprint test in elite rugby sevens athletes. Twenty elite rugby sevens players performed ten 40 m sprints on a 30 s cycle with participant's running back and forth in a marked lane. Radar was used to assess maximal overground sprint performance over each 40 m. Macroscopic mechanical properties (maximal horizontal force (F0 ), maximal horizontal power (Pmax ), maximal ratio of horizontal force (RFpeak ), decrease in the ratio of horizontal-to-total force (DRF ), total force and maximal sprinting velocity (v0 )) were drawn from horizontal force velocity relationships, using a validated method applied to the speed-time data...
November 8, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/30369286/evidence-based-post-exercise-recovery-strategies-in-rugby-a-narrative-review
#7
Julio Calleja-González, Juan Mielgo-Ayuso, Sergej M Ostojic, Margaret T Jones, Diego Marques-Jiménez, Toni Caparros, Nicolas Terrados
In the sport of rugby, athletes need a multitude of sport-specific skills along with endurance, power, and speed to optimize performance. Further, it is not unusual for athletes to play several competitive matches with insufficient recovery time. Rugby requires repeated bouts of high-intensity actions intermixed with brief periods of low-to-moderate active recovery or passive rest. Specifically, a match is characterized by repeated explosive activities, such as jumps, shuffles, and rapid changes of direction...
October 27, 2018: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/30363038/progressive-workload-periodization-maximizes-effects-of-nordic-hamstring-exercise-on-muscle-injury-risk-factors
#8
Lucas Severo-Silveira, Maurício P Dornelles, Felipe X Lima-E-Silva, César L Marchiori, Thales M Medeiros, Evangelos Pappas, Bruno M Baroni
Severo-Silveira, L, Dornelles, MP, Lima-e-Silva, FX, Marchiori, CL, Medeiros, TM, Pappas, E, and Baroni, BM. Progressive workload periodization maximizes effects of Nordic hamstring exercise on muscle injury risk factors. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to investigate the effect of 2 different Nordic hamstring exercise (NHE) training programs (constant workload vs. progressive workload) on multiple risk factors for hamstring strain injury in high competitive level athletes. Twenty-one premier league rugby union players (∼26 years) were randomized into 1 of 2 experimental groups and completed an 8-week NHE training program: constant training group (CTG) or progressive training group (PTG)...
October 22, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30321486/recovery-following-rugby-union-matches-effects-of-cold-water-immersion-on-markers-of-fatigue-and-damage
#9
Renan Felipe Hartmann Nunes, Rob Duffield, Fábio Yuzo Nakamura, Ewertton de Souza Bezerra, Raphael Luiz Sakugawa, Irineu Loturco, Franciane Bobinski, Daniel Fernandes Martins, Luiz Guilherme Antonacci Guglielmo
We investigated the effect of post-match cold-water immersion (CWI) on markers of muscle damage, neuromuscular fatigue and perceptual responses within 72 h after a Rugby match. Twenty-two professional male Rugby players were randomized into CWI (10°C/10min; n=11) or Control (CON:30min seated; n=11) groups. Activity profile from Global Positioning Satellite systems and post-match rating of perceived exertion were measured to determined match load. Biochemical (tumor necrosis factor alpha [TNF-α], interleukin-6 [IL-6]), neuromuscular performance (squat and countermovement jump [SJ; CMJ], peak power output [PPO], rate of force development [RFD], stiffness, 10- and 30-m sprint time and perceptual markers (soreness, perceived recovery) were obtained at pre, post, 30 min, 24, 48 and 72 h post-match...
October 15, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/30306824/caution-using-data-from-triaxial-accelerometers-housed-in-player-tracking-units-during-running
#10
Suzi Edwards, Samuel White, Seaton Humphreys, Robert Robergs, Nicholas O'Dwyer
Usage of accelerometers within player tracking devices in sport to quantify load, vertical ground reaction force (vGRF) or energy expenditure is contrary to placement guidelines. This study aimed to determine whether trunk-mounted accelerometers were a valid and reliable method to estimate thoracic segment or centre of gravity (COG) acceleration or vGRF, and the whether the elasticised harness contributes to the overestimation of acceleration. Ten male amateur rugby players performed five linear running tasks per lower limb at three speeds, twice, each with a different player tracking unit...
October 11, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/30300035/critical-speed-as-a-measure-of-aerobic-fitness-for-male-rugby-union-players
#11
Mark Kramer, Mark Watson, Rosa Du Randt, Robert W Pettitt
PURPOSE: To compare critical speed (CS) derived from all-out testing (AOT) for linear and shuttle running with metrics from a graded exercise test (GXT), the Yo-Yo intermittent recovery test (YYIR1), and estimation of an 800-m shuttle time-trial. METHODS: Twelve male rugby players completed a GXT, YYIR1, a linear AOT, shuttle AOTs of 25- and 50-m, and an 800-m shuttle time-trial consisting of 32 x 25-m shuttles. RESULTS: Strong linear correlations were observed between maximum oxygen uptake (V̇O2max ) and CS (m·s-1 ) derived from the linear AOT (3...
October 9, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/30299389/effect-of-velocity-based-loading-on-acceleration-kinetics-and-kinematics-during-sled-towing
#12
Ian Bentley, Jonathan K Sinclair, Steve J Atkins, John Metcalfe, Christopher J Edmundson
Bentley, I, Sinclair, JK, Atkins, SJ, Metcalfe, J, and Edmundson, CJ. Effect of velocity-based loading on acceleration kinetics and kinematics during sled towing. J Strength Cond Res XX(X): 000-000, 2018-Sled towing (ST) provides an external load in the form of a sled towed using a shoulder or waist harness and cord behind the athlete. Loading strategies have varied greatly between studies, and despite many investigations, there is little agreement on the optimum sled loading to develop the acceleration phase...
October 5, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30289870/show-me-tell-me-encourage-me-the-effect-of-different-forms-of-feedback-on-resistance-training-performance
#13
Jonathon Weakley, Kyle Wilson, Kevin Till, Harry Banyard, James Dyson, Padraic Phibbs, Dale Read, Ben Jones
Weakley, J, Wilson, K, Till, K, Banyard, H, Dyson, J, Phibbs, P, Read, D, and Jones, B. Show me, tell me, encourage me: The effect of different forms of feedback on resistance training performance. J Strength Cond Res XX(X): 000-000, 2018-When performing resistance training, verbal kinematic feedback and visual kinematic feedback are known to enhance performance. In addition, providing verbal encouragement can assist in the attenuation of fatigue. However, the effects of these forms of feedback have never been compared...
October 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30138238/anthropometric-and-physiological-characteristics-of-elite-male-rugby-athletes
#14
Jon Brazier, Mark Antrobus, Georgina K Stebbings, Stephen H Day, Peter Callus, Robert M Erskine, Mark A Bennett, Liam P Kilduff, Alun G Williams
Brazier, J, Antrobus, M, Stebbings, GK, Day, SH, Callus, P, Erskine, RM, Bennett, MA, Kilduff, LP, and Williams, AG. Anthropometric and physiological characteristics of elite male rugby athletes. J Strength Cond Res XX(X): 000-000, 2018-This is the first article to review the anthropometric and physiological characteristics required for elite rugby performance within both rugby union (RU) and rugby league (RL). Anthropometric characteristics such as height and body mass, and physiological characteristics such as speed and muscular strength, have previously been advocated as key discriminators of playing level within rugby...
August 21, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30116113/modelling-the-hrv-response-to-training-loads-in-elite-rugby-sevens-players
#15
Sean Williams, Stephen West, Dan Howells, Simon P T Kemp, Andrew A Flatt, Keith Stokes
A systems modelling approach can be used to describe and optimise responses to training stimuli within individuals. However, the requirement for regular maximal performance testing has precluded the widespread implementation of such modelling approaches in team-sport settings. Heart rate variability (HRV) can be used to measure an athlete's adaptation to training load, without disrupting the training process. As such, the aim of the current study was to assess whether chronic HRV responses, as a representative marker of training adaptation, could be predicted from the training loads undertaken by elite Rugby Sevens players...
September 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/30113915/effects-of-accentuated-eccentric-loading-on-muscle-properties-strength-power-and-speed-in-resistance-trained-rugby-players
#16
Jamie Douglas, Simon Pearson, Angus Ross, Mike McGuigan
Douglas, J, Pearson, S, Ross, A, and McGuigan, M. Effects of accentuated eccentric loading on muscle properties, strength, power, and speed in resistance-trained rugby players. J Strength Cond Res 32(10): 2750-2761, 2018-The purpose of this study was to determine the effects of slow and fast tempo resistance training incorporating accentuated eccentric loading (AEL) compared with traditional resistance training (TRT) in trained rugby players. Fourteen subjects (19.4 ± 0.8 years, 1.82 ± 0.05 m, 97.0 ± 11...
October 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30095735/validity-and-reliability-of-methods-to-determine-barbell-displacement-in-heavy-back-squats-implications-for-velocity-based-training
#17
Brendyn B Appleby, Harry Banyard, Prue Cormie, Stuart J Cormack, Robert U Newton
Appleby, BB, Banyard, H, Cormie, P, Cormack, SJ, and Newton, RU. Validity and reliability of methods to determine barbell displacement in heavy back squats: Implications for velocity-based training. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to investigate the validity and reliability of methods for determining barbell displacement during heavy back squats. Twelve well-trained rugby union players (mean ± SD 1 repetition maximum [1RM] 90° squat = 196.3 ± 29.2 kg) completed 2 sets of 2 repetitions at 70, 80, and 90% of 1RM squats...
August 8, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30088218/the-use-of-microtechnology-to-quantify-the-peak-match-demands-of-the-football-codes-a-systematic-review
#18
REVIEW
Sarah Whitehead, Kevin Till, Dan Weaving, Ben Jones
BACKGROUND: Quantifying the peak match demands within the football codes is useful for the appropriate prescription of external training load. Wearable microtechnology devices can be used to identify the peak match demands, although various methodologies exist at present. OBJECTIVES: This systematic review aimed to identify the methodologies and microtechnology-derived variables used to determine the peak match demands, and to summarise current data on the peak match demands in the football codes...
November 2018: Sports Medicine
https://www.readbyqxmd.com/read/30074967/influence-of-weekly-workload-on-physical-biochemical-and-psychological-characteristics-in-professional-rugby-union-players-over-a-competitive-season
#19
Romain Dubois, Mark Lyons, Thierry Paillard, Olivier Maurelli, Jacques Prioux
Dubois, R, Lyons, M, Paillard, T, Maurelli, O, and Prioux, J. Influence of weekly workload on physical, biochemical and psychological characteristics in professional rugby union players over a competitive season. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to (a) quantify the physical workload (P-WL) during training and games throughout the professional rugby season and (b) analyze the influence of the season period and weekly-WL, at short (acute) and moderate (chronic) terms, on physical, biochemical, and psychological responses during the season...
August 2, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30057775/the-athletic-shoulder-ash-test-reliability-of-a-novel-upper-body-isometric-strength-test-in-elite-rugby-players
#20
Ben Ashworth, Patrick Hogben, Navraj Singh, Laura Tulloch, Daniel D Cohen
Objectives: Lower limb isometric tests are used to assess strength and strength asymmetries and monitor reductions in muscle force that may contribute to loss of performance and increase injury risk. Isometric tests in the upper body may be appropriate to monitor neuromuscular performance of the shoulder joint in sports involving contact and overhead actions. The aim of this study was to determine the reliability of a novel upper body isometric strength test. Methods: Eighteen elite rugby players (age 22...
2018: BMJ Open Sport & Exercise Medicine
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