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https://read.qxmd.com/read/30851976/a-joint-kinetic-analysis-of-rugby-place-kicking-technique-to-understand-why-kickers-achieve-different-performance-outcomes
#1
Alexandra C Atack, Grant Trewartha, Neil E Bezodis
We aimed to identify differences in kicking leg and torso mechanics between groups of rugby place kickers who achieve different performance outcomes, and to understand why these features are associated with varying levels of success. Thirty-three experienced place kickers performed maximum effort place kicks, whilst three-dimensional kinematic (240 Hz) and ground reaction force (960 Hz) data were recorded. Kicking leg and torso mechanics were compared between the more successful ('long') kickers and two sub groups of less successful kickers ('short' and 'wide-left') using magnitude-based inferences and statistical parametric mapping...
February 28, 2019: Journal of Biomechanics
https://read.qxmd.com/read/30840517/the-effects-of-augmented-feedback-on-sprint-jump-and-strength-adaptations-in-rugby-union-players-following-a-four-week-training-programme
#2
Jonathon Weakley, Kevin Till, John Sampson, Harry Banyard, Cedric Leduc, Kyle Wilson, Greg Roe, Ben Jones
PURPOSE: Feedback can enhance acute physical performance. However, the effects of feedback on physical adaptation has received little attention. Therefore, the purpose of this study was to determine the effect of feedback during a four-week training programme on jump, sprint and strength adaptations. METHODS: Twenty-eight semi-professional male rugby union players were strength-matched into two groups (feedback and non-feedback). During the four-week training programme, the Feedback group received immediate, objective feedback on a) mean concentric velocity during resistance training repetitions, b) distance feedback for standing broad jumps, and c) time for sprints...
March 6, 2019: International Journal of Sports Physiology and Performance
https://read.qxmd.com/read/30789579/sleep-quality-and-quantity-of-international-rugby-sevens-players-during-pre-season
#3
Cédric Leduc, Ben Jones, Julien Robineau, Julien Piscione, Mathieu Lacome
Leduc, C, Jones, B, Robineau, J, Piscione, J, and Lacome, M. Sleep quality and quantity of international rugby sevens players during pre-season. J Strength Cond Res XX(X): 000-000, 2019-The aim of this study was to investigate the influence of training load on objective and subjective sleep measures among elite rugby sevens players during pre-season. Nine international male rugby sevens players participated in this study. Actigraphic and subjective sleep assessment were performed on a daily basis to measure sleep parameters...
February 14, 2019: Journal of Strength and Conditioning Research
https://read.qxmd.com/read/30779880/a-2-year-prospective-study-of-injury-epidemiology-in-elite-australian-rugby-sevens-exploration-of-incidence-rates-severity-injury-type-and-subsequent-injury-in-men-and-women
#4
Liam A Toohey, Michael K Drew, Caroline F Finch, Jill L Cook, Lauren V Fortington
BACKGROUND: Injuries are common in rugby sevens, but studies to date have been limited to short, noncontinuous periods and reporting of match injuries only. PURPOSE: To report the injury incidence rate (IIR), severity, and burden of injuries sustained by men and women in the Australian rugby sevens program and to provide the first longitudinal investigation of subsequent injury occurrence in rugby sevens looking beyond tournament injuries only. STUDY DESIGN: Descriptive epidemiology study...
February 19, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30763328/overcoming-the-problem-of-multicollinearity-in-sports-performance-data-a-novel-application-of-partial-least-squares-correlation-analysis
#5
Dan Weaving, Ben Jones, Matt Ireton, Sarah Whitehead, Kevin Till, Clive B Beggs
OBJECTIVES: Professional sporting organisations invest considerable resources collecting and analysing data in order to better understand the factors that influence performance. Recent advances in non-invasive technologies, such as global positioning systems (GPS), mean that large volumes of data are now readily available to coaches and sport scientists. However analysing such data can be challenging, particularly when sample sizes are small and data sets contain multiple highly correlated variables, as is often the case in a sporting context...
2019: PloS One
https://read.qxmd.com/read/30739767/direct-and-indirect-effects-of-joint-torque-inputs-during-an-induced-speed-analysis-of-a-swinging-motion
#6
Sekiya Koike, Tatsuya Ishikawa, Alexander P Willmott, Neil E Bezodis
This study proposed a method to quantify direct and indirect effects of the joint torque inputs in the speed-generating mechanism of a swinging motion. Linear and angular accelerations of all segments within a multi-linked system can be expressed as the sum of contributions from a joint torque term, gravitational force term and motion-dependent term (MDT), where the MDT is a nonlinear term consisting of centrifugal force, Coriolis force and gyroscopic effect moment components. Direct effects result from angular accelerations induced by a joint torque at a given instant, whereas indirect effects arise through the MDT induced by joint torques exerted in the past...
January 25, 2019: Journal of Biomechanics
https://read.qxmd.com/read/30707142/kinetics-and-kinematics-of-the-squat-and-step-up-in-well-trained-rugby-players
#7
Brendyn B Appleby, Robert U Newton, Stuart J Cormack
Appleby, BB, Newton, RU, and Cormack, SJ. Kinetics and kinematics of the squat and step-up in well-trained rugby players. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to compare and contrast the kinetics and kinematics of squat and step-up performance in well-trained athletes. Triaxial ground reaction force (GRF) and 3D kinematic data were collected in 4 maximal effort repetitions each at 70, 80, and 90% of 1 repetition maximum (1RM) of squat and step-up. The difference in concentric phase kinetics and kinematics between the squat and step-up was compared using effect sizes (ES ± 90% confidence limits [CLs]) classified as: less than 0...
January 30, 2019: Journal of Strength and Conditioning Research
https://read.qxmd.com/read/30707137/the-duration-specific-peak-average-running-speeds-of-european-super-league-academy-rugby-league-match-play
#8
Sarah Whitehead, Kevin Till, Dan Weaving, Nick Dalton-Barron, Matt Ireton, Ben Jones
Whitehead, S, Till, K, Weaving, D, Dalton-Barron, N, Ireton, M, and Jones, B. Duration-specific peak average running speeds of European Super League Academy rugby league match play. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to quantify the duration-specific peak average running speeds of Academy-level rugby league match play, and compare between playing positions. Global positioning system data were collected from 149 players competing across 9 teams during 21 professional Academy (under-19) matches...
January 30, 2019: Journal of Strength and Conditioning Research
https://read.qxmd.com/read/30707136/passive-heat-maintenance-after-an-initial-warm-up-improves-high-intensity-activity-during-an-interchange-rugby-league-movement-simulation-protocol
#9
Matthew Fairbank, Jamie Highton, Craig Twist
Fairbank, M, Highton, J, Twist, C. Passive heat maintenance after an initial warm-up improves high-intensity activity during an interchange rugby league movement simulation protocol. J Strength Cond Res XX(X): 000-000, 2019-This study examined using passive heat maintenance (PHM) to maintain core temperature after a warm-up and its effect on simulated first half running performance in rugby players. Thirteen male rugby players completed this randomized crossover study. Tympanic temperature was taken before a warm-up and then after a further 15 minutes of passive recovery either with (PHM) or without (CON) a PHM garment...
January 30, 2019: Journal of Strength and Conditioning Research
https://read.qxmd.com/read/30694968/salivary-iga-as-a-predictor-of-upper-respiratory-tract-infections-and-relationship-to-training-load-in-elite-rugby-union-players
#10
Caoimhe Tiernan, Mark Lyons, Tom Comyns, Alan M Nevill, Giles Warrington
Tiernan, C, Lyons, M, Comyns, T, Nevill, AM, and Warrington, G. Salivary IgA as a predictor of upper respiratory tract infections and relationship to training load in elite rugby union players. J Strength Cond Res XX(X): 000-000, 2019-Upper Respiratory Tract Infections (URTI) are among the most common illnesses reported in athletes. An URTI can result in missed training days, which in turn may lead to performance decrements. The purpose of this study was to investigate the use of salivary immunoglobulin A (sIgA) as a predictor of URTI, while also exploring the relationship to weekly training load in elite rugby union players...
January 23, 2019: Journal of Strength and Conditioning Research
https://read.qxmd.com/read/30688873/specificity-and-transfer-of-lower-body-strength-influence-of-bilateral-or-unilateral-lower-body-resistance-training
#11
Brendyn B Appleby, Stuart J Cormack, Robert U Newton
Appleby, BB, Cormack, SJ, and Newton, RU. Specificity and transfer of lower-body strength: Influence of bilateral or unilateral lower-body resistance training. J Strength Cond Res 33(2): 318-326, 2019-To examine the development of lower-body strength using either bilateral or unilateral resistance training. Developmental rugby players (n = 33; mean training age = 5.4 ± 2.9 years; 1 repetition maximum [1RM] 90° squat = 178 ± 27 kg) completed an 18-week randomized controlled training design (bilateral group [BIL], n = 13; unilateral group [UNI], n = 10; comparison, n = 10)...
February 2019: Journal of Strength and Conditioning Research
https://read.qxmd.com/read/30676389/repeated-high-intensity-effort-activity-in-international-male-rugby-sevens
#12
Anthony Couderc, Tim J Gabbett, Julien Piscione, Julien Robineau, Alexis Peeters, Germain Igarza, Claire Thomas, Christine Hanon, Mathieu Lacome
Couderc, A, Gabbett, TJ, Piscione, J, Robineau, J, Peeters, A, Igarza, G, Thomas, C, Hanon, C, and Lacome, M. Repeated high-intensity effort activity in international male Rugby Sevens. J Strength Cond Res XX(X): 000-000, 2018-Rugby Sevens is characterized by repeated high-intensity accelerations, sprinting, and collisions, commonly referred to as repeated high-intensity effort (RHIE) activity. Although repeated acceleration and sprinting activity of Rugby Sevens has been investigated, to date, no study has investigated the repeated running and collision activity of international Rugby Sevens during competitive events...
January 22, 2019: Journal of Strength and Conditioning Research
https://read.qxmd.com/read/30676143/influence-of-physical-characteristics-and-match-outcome-n-technical-errors-during-rugby-league-match-play
#13
Rich D Johnston
PURPOSE: To explore the relationship between technical errors during rugby league games, match success and physical characteristics. METHODS: Twenty-seven semi-professional rugby league players participated in this study (24.8 ± 2.5 years; 183.5 ± 5.3 cm; 97.1 ± 11.6 kg). Aerobic fitness, strength, and power were assessed prior to the start of the competitive season before technical performance was tracked during 22 competitive fixtures. Attacking errors were determined as any error that occurred in possession of the ball that resulted in a handover to the opposition...
January 24, 2019: International Journal of Sports Physiology and Performance
https://read.qxmd.com/read/30664109/effects-of-a-rugby-league-match-simulation-on-decision-making-in-elite-junior-rugby-league
#14
Kellyanne Redman, Kylie Steel, Vincent Kelly, Jason Siegler
Redman, K, Steel, K, Kelly, V, and Siegler, J. Effects of a rugby league match simulation on decision-making in elite junior rugby league. J Strength Cond Res XX(X): 000-000, 2019-The paucity of research on decision-making in Rugby league within the context of a match, and the potential for age and playing experience to influence decision-making ability, warrants further investigation. Therefore, the aim of this study was to determine the effects of a simulated rugby league match on decision-making in elite junior rugby league players...
January 17, 2019: Journal of Strength and Conditioning Research
https://read.qxmd.com/read/30651223/modelling-the-relationships-between-volume-intensity-and-injury-risk-in-professional-rugby-league-players
#15
Cloe Cummins, Mitchell Welch, Brendan Inkster, Balin Cupples, Dan Weaving, Ben Jones, Doug King, Aron Murphy
OBJECTIVE: This study aimed to: (a) identify the association between external-workloads and injury-risk in the subsequent week; and (b) understand the effectiveness of workload variables in establishing injury-risk. DESIGN: Retrospective cohort study. METHODS: Workload and injury data (soft-tissue) were collected from forty-eight professional male rugby league players. Load variables included duration (min), total distance (m), relative distance (mmin-1 ), high speed distance ([m]>20kmh-1 ), very-high speed distance ([m]>25kmh-1 ), acceleration and deceleration efforts (count) and PlayerLoad (Arbitrary Unit: AU)...
December 18, 2018: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30640300/initial-maximum-push-rim-propulsion-and-sprint-performance-in-elite-wheelchair-rugby-players
#16
Adrian García-Fresneda, Gerard Carmona, Xabier Padullés, Sergi Nuell, Josep M Padullés, Joan A Cadefau, Aitor Iturricastillo
García-Fresneda, A, Carmona, G, Padullés, X, Nuell, S, Padullés, JM, Cadefau, JA, and Iturricastillo, A. Initial maximum push-rim propulsion and sprint performance in elite wheelchair rugby players. J Strength Cond Res XX(X): 000-000, 2018-Wheelchair rugby (WR) is an increasingly popular Paralympic sport; however, the evidence base supporting the validity and reliability of field tests to assess the physical condition of WR players is in its infancy. Therefore, here, we aimed to evaluate the intrasession reliability of the initial maximum push-rim propulsion (IMPRP) test and the sprint test, and to determine the relationships between IMPRP mechanical outputs and sprint performance variables...
January 10, 2019: Journal of Strength and Conditioning Research
https://read.qxmd.com/read/30577602/change-of-direction-deficit-in-national-team-rugby-union-players-is-there-an-influence-of-playing-position
#17
Tomás T Freitas, Pedro E Alcaraz, Chris Bishop, Julio Calleja-González, Ademir F S Arruda, Aristide Guerriero, Valter P Reis, Lucas A Pereira, Irineu Loturco
The aim of this study was to investigate the change of direction (COD) ability and deficits of elite rugby union players, discriminating between position (backs and forwards), and between "faster and slower players", in multiple COD tasks. Twenty-four male rugby union players from the Brazilian senior National team completed the following assessments: Squat and countermovement jumps; drop jump; standing long jump, horizontal triple jumps; 40-m linear sprint; Pro-agility, L-Drill, and Zig-zag COD tests; and squat 1-repetition maximum...
December 21, 2018: Sports
https://read.qxmd.com/read/30574734/conservative-treatment-after-axillary-nerve-re-injury-in-a-rugby-player-a-case-report
#18
Antonio Frizziero, Filippo Vittadini, Alessandra Del Felice, Domenico Creta, Erika Ferlito, Roberto Gasparotti, Stefano Masiero
BACKGROUND: Axillary nerve injuries are uncommon, although the incidence is higher in athletes, both related to direct contusion or quadrilateral space syndrome. While few studies have investigated conservative strategies that could be proposed to avoid surgery, no previous case report documented the possible role of rehabilitation in axillary nerve re- injuries. CASE REPORT: Our patient is a 27-year-old male professional rugby player who experienced a recurrent episode of deltoid strength loss, after a previous axillary nerve injury...
December 21, 2018: European Journal of Physical and Rehabilitation Medicine
https://read.qxmd.com/read/30558924/bilateral-scapular-kinematics-asymmetries-and-shoulder-pain-in-wheelchair-athletes
#19
Barry S Mason, Riemer J K Vegter, Thomas A W Paulson, Dylan Morrissey, Jan W van der Scheer, Victoria L Goosey-Tolfrey
BACKGROUND: Shoulder pain is the most common complaint for wheelchair athletes. Scapular orientation and dyskinesia are thought to be associated with shoulder pathology, yet no previous studies have examined the bilateral scapula kinematics of wheelchair athletes during propulsion. RESEARCH QUESTION: To examine bilateral scapular kinematics of highly trained wheelchair rugby (WR) players and any associations with self-reported shoulder pain during everyday wheelchair propulsion...
September 2018: Gait & Posture
https://read.qxmd.com/read/30555718/changes-in-northern-hemisphere-male-international-rugby-union-players-body-mass-and-height-between-1955-and-2015
#20
Neil E Hill, Sian Rilstone, Michael J Stacey, Dimitri Amiras, Stephen Chew, David Flatman, Nick S Oliver
Objectives: We sought to establish the effects of professionalism, which officially began in 1995, on the body mass and height of northern hemisphere male international rugby union (RU) players. We hypothesised that mass would significantly increase following professionalism. We also investigated the changes in size of players according to their playing position, and we compared changes to rugby league (RL) players and the public. Methods: The body mass and height of players representing their international team for that country's first game of the Five Nations in 1955, 1965, 1975, 1985 and 1995 and, for 2005 and 2015, the Six Nations, were collected from matchday programmes...
2018: BMJ Open Sport & Exercise Medicine
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