Kenneth L. Quarrie
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View article: Head impact forces in rugby tackles are influenced by tackler position and the ball carrier instantaneous speed at contact in front-on, one-on-one tackle scenarios
Head impact forces in rugby tackles are influenced by tackler position and the ball carrier instantaneous speed at contact in front-on, one-on-one tackle scenarios Open
Background: It is not well understood how tackling technique influences the inertial head kinematics of a tackler or ball carrier. This study identified the modifiable components of the tackler's technique (including instantaneous speed at…
View article: Neurodegenerative Diseases in Male Former First-Class New Zealand Rugby Players
Neurodegenerative Diseases in Male Former First-Class New Zealand Rugby Players Open
Background Growing concern surrounds the risk of neurodegenerative diseases in high-level collision sports, but research on Rugby Union's connection to these diseases is limited. Objective This study sought to examine the long-term neurode…
View article: A tackler correctly adhering to the tackle instruction in a front-on, one-on-one torso tackle alters the peak inertial head kinematics of the ball carrier but not the tackler
A tackler correctly adhering to the tackle instruction in a front-on, one-on-one torso tackle alters the peak inertial head kinematics of the ball carrier but not the tackler Open
The ball carriers' inertial head kinematics but not the tacklers were increased when the tackler adhered to this study's variants of the over and under the ball tackle instructions, suggesting that the tacklers were more effective in their…
View article: Studying Contact Replays: Investigating Mechanisms, Management and Game Exposures (SCRIMMAGE) for brain health in the Australasian National Rugby League: a protocol for a database design
Studying Contact Replays: Investigating Mechanisms, Management and Game Exposures (SCRIMMAGE) for brain health in the Australasian National Rugby League: a protocol for a database design Open
Concussions in contact sports are challenging for athletes, health professionals and sporting bodies to prevent, detect and manage. Design of interventions for primary prevention, early recognition of concussion and continuing to improve p…
View article: Epidemiological Principles in Claims of Causality: An Enquiry into Repetitive Head Impacts (RHI) and Chronic Traumatic Encephalopathy (CTE)
Epidemiological Principles in Claims of Causality: An Enquiry into Repetitive Head Impacts (RHI) and Chronic Traumatic Encephalopathy (CTE) Open
View article: Epidemiological Principles in Claims of Causality: An Enquiry into Repetitive Head Impacts (RHI) and Chronic Traumatic Encephalopathy (CTE)
Epidemiological Principles in Claims of Causality: An Enquiry into Repetitive Head Impacts (RHI) and Chronic Traumatic Encephalopathy (CTE) Open
View article: Investigating long-term health outcomes in high-level rugby union players using linked administrative data
Investigating long-term health outcomes in high-level rugby union players using linked administrative data Open
Objective and ApproachThe Kumanu Tāngata study investigates long-term health outcomes in male high-level rugby union players in New Zealand using the Integrated Data Infrastructure (IDI), a comprehensive de-identified whole-population admi…
View article: Tacklers' shoulder abduction and flexion at contact alter when engaging in different front-on, one-on-one tackle instructions from an expert coach
Tacklers' shoulder abduction and flexion at contact alter when engaging in different front-on, one-on-one tackle instructions from an expert coach Open
Tacklers modified the way they positioned their shoulder joint when engaging in legal front-on, one-on-one tackles with different tackle instructions. More prominent positions of shoulder abduction and flexion, and head-uptrunk contralater…
View article: Injury in Starting and Replacement Players from Five Professional Men’s Rugby Unions
Injury in Starting and Replacement Players from Five Professional Men’s Rugby Unions Open
View article: A Comparison of Cognitive Function in Former Rugby Union Players Compared with Former Non-Contact-Sport Players and the Impact of Concussion History
A Comparison of Cognitive Function in Former Rugby Union Players Compared with Former Non-Contact-Sport Players and the Impact of Concussion History Open
View article: Kumanu Tāngata: the aftermatch study – protocol to examine the health outcomes of high-level male rugby union players using linked administrative data
Kumanu Tāngata: the aftermatch study – protocol to examine the health outcomes of high-level male rugby union players using linked administrative data Open
There is increasing interest in the potential long-term outcomes of participation in contact and collision sports, driven by evidence of higher rates of neurodegenerative diseases among former athletes. Recent research has capitalised on l…
View article: The World Rugby and International Rugby Players Contact Load Guidelines: From conception to implementation and the future
The World Rugby and International Rugby Players Contact Load Guidelines: From conception to implementation and the future Open
Managing training load in rugby union is crucial for optimising performance and injury prevention. Contact training warrants attention because of higher overall injury and head impact risk, yet players must develop physical, technical, and…
View article: Kumanu Tāngata—The Aftermatch Project: Neurodegenerative Disease Epidemiology in Former First-Class New Zealand Rugby Players
Kumanu Tāngata—The Aftermatch Project: Neurodegenerative Disease Epidemiology in Former First-Class New Zealand Rugby Players Open
View article: COVID-19 Lockdown: A Global Study Investigating the Effect of Athletes’ Sport Classification and Sex on Training Practices
COVID-19 Lockdown: A Global Study Investigating the Effect of Athletes’ Sport Classification and Sex on Training Practices Open
Purpose : To investigate differences in athletes’ knowledge, beliefs, and training practices during COVID-19 lockdowns with reference to sport classification and sex. This work extends an initial descriptive evaluation focusing on athlete …
View article: Applying generalized funnel plots to help design statistical analyses
Applying generalized funnel plots to help design statistical analyses Open
Researchers across many fields routinely analyze trial data using Null Hypothesis Significance Tests with zero null and p < 0.05. To promote thoughtful statistical testing, we propose a visualization tool that highlights practically meanin…
View article: NZ-RugbyHealth Study: Self-reported Injury Experience and Current Health of Former Rugby Union and Non-contact Sport Players
NZ-RugbyHealth Study: Self-reported Injury Experience and Current Health of Former Rugby Union and Non-contact Sport Players Open
View article: 301 Epidemiology of youth injuries across seven sports at a single college in England
301 Epidemiology of youth injuries across seven sports at a single college in England Open
View article: 250 New Zealand super rugby injury surveillance: match injuries from 2015–2018
250 New Zealand super rugby injury surveillance: match injuries from 2015–2018 Open
Background Rugby union is a collision-based sport, as such the occurrence of injuries resulting in time-loss from participation is inevitable. In 2015 New Zealand Rugby (NZR) began an injury surveillance program with all NZ-based Super Rug…
View article: Employing Standardised Methods to Compare Injury Risk Across Seven Youth Team Sports
Employing Standardised Methods to Compare Injury Risk Across Seven Youth Team Sports Open
Injury surveillance systems seek to describe injury risk for a given sport, in order to inform preventative strategies. This often leads to comparisons between studies, although these inferences may be inappropriate, considering the range …
View article: Advancing statistical decision-making in sports science
Advancing statistical decision-making in sports science Open
The magnitude-based decisions (MBD) procedure was developed within sports science as an alternative to null hypothesis significance tests. It aimed to emphasise effect sizes and discourage dichotomous decision-making. The use of MBD was ba…
View article: Author response for "Nutritional interventions to improve neurophysiological impairments following traumatic brain injury: A systematic review"
Author response for "Nutritional interventions to improve neurophysiological impairments following traumatic brain injury: A systematic review" Open
View article: Consensus on a video analysis framework of descriptors and definitions by the Rugby Union Video Analysis Consensus group
Consensus on a video analysis framework of descriptors and definitions by the Rugby Union Video Analysis Consensus group Open
Using an expert consensus-based approach, a rugby union Video Analysis Consensus (RUVAC) group was formed to develop a framework for video analysis research in rugby union. The aim of the framework is to improve the consistency of video an…
View article: International Olympic Committee consensus statement: methods for recording and reporting of epidemiological data on injury and illness in sport 2020 (including STROBE Extension for Sport Injury and Illness Surveillance (STROBE-SIIS))
International Olympic Committee consensus statement: methods for recording and reporting of epidemiological data on injury and illness in sport 2020 (including STROBE Extension for Sport Injury and Illness Surveillance (STROBE-SIIS)) Open
Injury and illness surveillance, and epidemiological studies, are fundamental elements of concerted efforts to protect the health of the athlete. To encourage consistency in the definitions and methodology used, and to enable data across s…
View article: International Olympic Committee Consensus Statement: Methods for Recording and Reporting of Epidemiological Data on Injury and Illness in Sports 2020 (Including the STROBE Extension for Sports Injury and Illness Surveillance (STROBE-SIIS))
International Olympic Committee Consensus Statement: Methods for Recording and Reporting of Epidemiological Data on Injury and Illness in Sports 2020 (Including the STROBE Extension for Sports Injury and Illness Surveillance (STROBE-SIIS)) Open
Background: Injury and illness surveillance, and epidemiological studies, are fundamental elements of concerted efforts to protect the health of the athlete. To encourage consistency in the definitions and methodology used, and to enable d…
View article: Correction to: Injury Risk in New Zealand Rugby Union: A Nationwide Study of Injury Insurance Claims from 2005 to 2017
Correction to: Injury Risk in New Zealand Rugby Union: A Nationwide Study of Injury Insurance Claims from 2005 to 2017 Open
View article: Injury Risk in New Zealand Rugby Union: A Nationwide Study of Injury Insurance Claims from 2005 to 2017
Injury Risk in New Zealand Rugby Union: A Nationwide Study of Injury Insurance Claims from 2005 to 2017 Open
View article: Guidelines for community-based injury surveillance in rugby union
Guidelines for community-based injury surveillance in rugby union Open
View article: Facts and values: on the acceptability of risks in children’s sport using the example of rugby — a narrative review
Facts and values: on the acceptability of risks in children’s sport using the example of rugby — a narrative review Open
A clash of values has been identified between those who assert that: 1. all childhood injuries, regardless of origin, are inherently undesirable and should be prevented and; 2. those who believe that some measure of injury to children is a…
View article: Risk factors for head injury events in professional rugby union: a video analysis of 464 head injury events to inform proposed injury prevention strategies
Risk factors for head injury events in professional rugby union: a video analysis of 464 head injury events to inform proposed injury prevention strategies Open
Objectives The tackle is responsible for the majority of head injuries during rugby union. In order to address head injury risk, risk factors during the tackle must first be identified. This study analysed tackle characteristics in the pro…