Jason Tee

• PhD Exercise Science
• Visiting Fellow at Leeds Beckett University

Objectives: The aim of this study was to analyse the relationship between unilateral leg strength, associated asymmetries and the injuries suffered by sub-elite Rugby League (RL) players in one competitive season. Design: A prospective cohort design was used. Method: Unilateral leg strength was measured using the rear foot elevated split squat...

Objective: Develop a questionnaire to monitor symptoms of player perceived shoulder function/dysfunction. Design: 3-Stage Online Delphi Study. Methods: Participants: surgeons, sports and exercise medics, academic researchers, strength and conditioning coaches, therapists and athletes split by level of expertise/experience. Stage-1: experts (n...

This study quantified and compared the collision and non-collision match characteristics across age categories (i.e. U12, U14, U16, U18, Senior) for both amateur and elite playing standards from Tier 1 rugby union nations (i.e. England, South Africa, New Zealand). Two-hundred and one male matches (5911 min ball-in-play) were coded using computerise...

Background Elite rugby players experience poor sleep quality and quantity. This lack of sleep could compromise post-exercise recovery. Therefore, it appears central to encourage sleep in order to improve recovery kinetics. However, the effectiveness of an acute ergogenic strategy such as sleep extension on recovery has yet to be investigated among...

This study aimed to 1) develop a consensus (≥70% agreement between experts) on injury risk factors specific to women playing rugby league, 2) establish the importance of the identified injury risk factors and the feasibility of mitigating these risk factors and 3) establish context specific barriers to injury risk management. Aim 1: A Delphi panel,...

Objective This study aimed to investigate the prevalence of self-reported shoulder dysfunction using the Rugby Shoulder Score (RSS) reported in arbitrary units (AU) of rugby players available for match selection (uninjured). Design Cross-sectional survey. Methods Paper survey at the mid-point of the season of uninjured players (n = 86 males (mean...

Purpose: Sleep is recognised as an important recovery strategy, yet little is known regarding its impact on post-match fatigue. The aims of this study were to 1.) describe sleep and post-match fatigue 2.) understand how sleep is affected by contextual and match factors and 3.) assess how changes in sleep can affect post-match fatigue. Methods: 23 m...

Rugby sevens is a demanding sport that requires extensive physical preparation. Coaches often have limited contact time with players, but must ensure adequate physical, technical and tactical preparation. Playing form approaches (e.g., small-sided/conditioned games and phase of play activities) for training team sports are effective for improving t...

ABSTRACT Objective The aim of this review was to synthesize the current understanding relating to the risks of lower body functional asymmetry with injury in athletic populations. Methods: An iterative data mining and sampling approach was used to construct a search phrase from key words, which were used to identify studies within SPORTdiscus, Me...

Background: Growing evidence highlights that elite rugby union players experience poor sleep quality and quantity which can be detrimental for performance. Objectives: This study aimed to i) compare objective sleep measures of rugby union players between age categories over a one week period, and ii) compare self-reported measures of sleep to wr...

Rugby sevens is a demanding sport that requires extensive physical preparation. Travel and logistical challenges in rugby sevens mean that coaches often have limited contact time with players, but must ensure adequate physical, technical and tactical preparation. Tactical periodisation (TP) presents a potential solution by simultaneously developing...

Understanding the locomotor characteristics of competition can help rugby league (RL) coaches optimise training prescription. To date, no research exists on the locomotor characteristics of women’s RL. The aim was to compare whole match and peak locomotor characteristics of women’s RL competition at international (RL World Cup [WRLWC]) and domestic...

Purpose: To explore the effects of travel related to international rugby sevens competition on sleep patterns. Methods: A total of 17 international male rugby sevens players participated in this study. Actigraphic and subjective sleep assessments were performed daily during 2 separate Sevens World Series competition legs (Oceania and America). T...

Despite literature highlighting numerous risks to the healthy psychosocial development of youth elite academy soccer players, little of this research is based on high-quality research designs. This study employed a prospective longitudinal cohort design to track psychosocial outcomes of academy involvement within male youth elite soccer players (n...

In professional team sport, managing injury risk depends on the effective collaboration of technical/tactical coaches, strength and conditioning coaches, sports medicine practitioners and sport scientists within a multidisciplinary team (MDT). Yet, to date no research has examined how these professionals might co-ordinate their efforts. The aim of...

In professional team sport, managing injury risk depends on the effective collaboration of technical/tactical coaches, strength and conditioning coaches, sports medicine practitioners and sport scientists within a multidisciplinary team (MDT). Yet, to date no research has examined how these professionals might co-ordinate their efforts. The aim of...

The implementation of long-term athletic development (LTAD) aims to improve health, physical activity, and performance of all youth. Contemporary LTAD models suggest that a broad range of physical and psychosocial competencies should be developed in youth, but few resources are available for coaches that describe “how” to achieve these outcomes. Th...

In recent years, an understanding has developed that sports injuries are the emergent outcomes of complex, dynamic systems. Thus, the influence of local contextual factors on injury outcomes is increasingly being acknowledged. These realisations place injury prevention research at a crossroads. Currently, injury prevention researchers develop unive...

Shattock, K and Tee, JC. Autoregulation in resistance training: A comparison of subjective versus objective methods. J Strength Cond Res XX(X): 000-000, 2020-Autoregulation (AR) is a resistance training periodization approach that adjusts training prescription in response to individual rates of athlete adaptation. AR training prescription can make...

Abstract: Background: Student-athletes are subject to significant demands due to their concurrent sporting and academic commitments which may affect their sleep. This study aimed to compare the self-reported sleep quality, quantity and intra-individual variability (IIV) of students and student-athletes through an online survey. Hypothesis: Student-...

Purpose: To investigate the convergent validity, reliability, and sensitivity over a week of training of a standardized running test to measure neuromuscular fatigue. Methods: Twenty male rugby union players were recruited for the study, which took place during preseason. The standardized running test consisted of four 60-m runs paced at ~5 m·s-...

Background: The scrum is a physical contest unique to the game of rugby union, important for determining match outcomes. Objective: This review will describe the current understanding of the kinetic and kinematic determinants of successful scrum performance to support coaching interventions and inform on future research. Methods: Literature re...

Introduction: In professional team sport managing injury risk depends on the effective collaboration of technical/tactical coaches, strength and conditioning coaches, sports medicine practitioners and sport scientists within a multidisciplinary team (MDT), yet to date no research has examined how these professionals might co-ordinate their efforts....

Introduction: Contemporary theories on players’ intensity distribution in team sports suggest they regulate their outputs using pacing strategies. There is currently limited information on the effect of bout duration on pacing and movement patterns in rugby union match play. This study investigated the effect of different bout duration types (whole...

Contemporary theories on players’ intensity distribution in team sports suggest that they regulate their outputs using pacing strategies. There is currently limited information on how movement patterns and pacing strategies of rugby union players in different position groups (forwards and backs) vary when exposed to different bout types (whole game...

Introduction: Autoregulation (AR) is a resistance training periodization approach that adjusts training prescription in response to individual rates of athlete adaptation1. AR has been demonstrated to be more effective than traditional linear periodization in inducing strength gains1. AR training prescription can make use of either subjective (rati...

Introduction: Injury causation is a complex phenomenon that results from the interaction of a wide variety of risk factors in a complex web of determinants1. Due to this inherent complexity, the skills required to effectively reduce injury risk do not lie within a single domain of professional practice. In professional team sport managing injury ri...

Academy rugby league competition is an important step along the pathway to professional status, but little is known about injury at this level of the game. The aim of this research was to establish the nature, incidence and burden of injury in English academy rugby league. Using an observational prospective cohort study design, and a time-loss inju...

Sports injury prevention is currently grappling with a game-changing shift. Increasingly, it is recognised that injury prevention is complex. Disappointingly, many well designed interventions prove ineffective in injury reduction when removed from controlled settings and inserted into real world contexts. These failures have lead to an understandin...

ECSS 2018 presentation - The result of research assessing injury outcomes during Academy level Rugby League match play in England

Decision-making is a key factor in developing coach expertise and effectiveness. This article presents a framework for enhancing coach decision-making within strength and conditioning (S&C). Based on theoretical understanding of the athlete (the ‘who’), S&C training principles and sport demands (the ‘what’) and learning theories and behaviour (the...

A combined view from coach and strength and conditioning coach, discussing how Tactical periodisation can be applied to rugby.

Limited research has compared the physical qualities of adolescent rugby union (RU) players across differing playing standards. This study therefore compared the physical qualities of academy and school Under-18 RU players. One-hundred and eighty-four (professional regional academy, n = 55 school, n = 129) male RU players underwent a physical testi...

The concept of tactical periodization has been popularized by a number of successful, high-profile soccer coaches. more recently, reports have indicated that tactical periodization approaches are being used within elite rugby union. however, few reports currently exist, and resources for coaches interested in using a tactical periodization approach...

Objectives: Due to the complex-systems nature of injuries, the responsibility for injury risk management cannot lie solely within a single domain of professional practice. Interdisciplinary collaboration between technical/tactical coaches, strength and conditioning coaches, team doctors, physical therapists and sport scientists is likely to have a...

Neuromuscular Performance | Recovery | | Game | Rugby union Headline P laying rugby union matches causes a number of fatigue responses, including reduced lower body neuromuscular function (NMF) (commonly measured by counter movement jump (CMJ))(1). The time course of this response following match play is well established in professional (2) and aca...

Background: Despite its apparent popularity, participation in the sport of rugby union is accompanied by a significant risk of injury. Concerned parties have recently questioned whether this risk is acceptable within school populations. This is difficult to assess within the South African schools’ population as no recent longitudinal injury studies...

PURPOSE: Injuries result from complex interactions between a variety of internal and external risk factors. Due to the complex-systems nature of injuries it is not possible to place responsibility for injury risk management solely within a single domain of professional practice. Instead, an interdisciplinary collaboration between technical/tactical...

PURPOSE: Forwards are regularly substituted within the sport of rugby union. There is currently limited information on how this effects movement patterns in rugby union match play. This study investigated how the movement patterns and pacing strategies of forwards that play the whole game in contrast with forwards inserted as substitutes in the sec...

Background: While static stretch (SS), proprioceptive neuromuscular facilitation (PNF) and oscillatory physiological mobilization techniques are documented to have positive effects on a range of motion (ROM), there are no reports on the effect of dynamic oscillatory stretching (DOS), a technique that combines these three techniques, on hamstring ex...

Background: Despite its apparent popularity, participation in the sport of rugby union is accompanied by a significant risk of injury. Concerned parties have recently questioned whether this risk is acceptable within school populations. This is difficult to assess within the South African schools’ population as no recent longitudinal injury studies...

Multidisciplinary approach to injury risk management in rugby union.

Description of how thorough injury auditing can support improved performance in professional rugby. This work lead to the development of the multidisciplinary team concept.

Purpose: In team sports, fatigue is manifested by a self-regulated decrease in movement distance and intensity. There is currently limited information on the effect of fatigue on movement patterns in rugby union match play, particularly for players in different position groups (backs vs. forwards). This study investigated the effect of different m...

Closely matching training session exertions with actual match-play intensities ensures players are physically prepared for competition. The movement patterns of four typical rugby union training activities (traditional endurance, high-intensity interval, game-based and skills training) were compared with match-play using global positioning systems....

Rugby Union is a collision sport with a relatively high risk of injury. The ability of the Functional Movement Screen (FMS) or its component tests to predict the occurrence of severe (≥28 days) injuries in professional players was assessed. 90 FMS test observations from 62 players across four different time periods were compared with severe injurie...

Background: Rugby union is a team sport played in professional leagues worldwide. Injuries occur frequently in professional rugby union, at a rate of 81 injuries per 1000 playing hours (95% CI 63 - 105) (Williams et al., 2013). The frequency of injury within the professional game affects player wellbeing, as well as the overall performance of teams...

There is currently limited information on the effect of fatigue and the impact of substitutes on movement patterns in rugby union match play. This study investigated the effect of half on movement patterns of whole game players in different positions (backs and forwards), and how these contrast with substitute players. Global positioning system (GP...

Background. Global positioning system (GPS) technology can provide accurate, non-invasive, real-time movement analysis of players participating in team sports. The application of this technology to rugby union will improve training practices by allowing improved understanding of movement characteristics and more individualised programmes. Objective...

Exercise-induced muscle damage (EIMD) is commonly experienced following either a bout of unaccustomed physical activity or following physical activity of greater than normal duration or intensity. The mechanistic factor responsible for the initiation of EIMD is not known; however, it is hypothesised to be either mechanical or metabolic in nature. T...

The 5-m repeat-sprint test (5-m RST) measures resistance to fatigue after repeated bouts of short-duration, high-intensity activity. This study determined the components of fitness associated with performance in 5-m RSTs. Speed (10-m and 40-m sprints), strength (bench press), agility, strength endurance (pull-ups and push-ups), and aerobic power (2...