Rugby Science Update 9

More than rugby: A scoping review of coaches in rugby

The purpose of this review was to synthesize the current coach-focused literature on rugby union, rugby league and rugby sevens. Using a scoping review approach, 105 articles were analysed. Ten coaches were also consulted for insight into whether they found the review beneficial for coaches and how researchers can improve the coach–research relationship. 44 of these studies reported male coaches, 3 reported female coaches and 18 reported both male and female coaches. Most of the studies focused on coaches within rugby union (76%) and rugby league (14%). The remainder of the studies focused on a combination of rugby cohorts (4%), and only one study focused on rugby sevens (1%).  Three themes were formed after a thematic analysis which included themes on coach knowledge (n=71), coach pedagogies (n=30) and coach development (n=4). The key finding within this review was that coaches had a good understanding of injury risk, prevention and management, specifically on concussions. The main strategy to improve coaches’ understanding of injury risk, prevention, and management of all aspects of injury is by providing coach educational resources, such as workshops and injury prevention programmes. Also, coaches are encouraged to build knowledge on all aspects related to rugby performance, such as technical and tactical knowledge. Another key finding of this review was the importance of the athlete–coach relationship, as well as coach reflective practice. Additionally, there is a shift in coaching pedagogy, from a coach-centred approach towards a player-centred approach.  This review focused on the three themes of key research areas and found that integrating all themes could improve rugby coaching research and practice moving forward.

This study is published in International Journal of Sports Science & Coaching.

Paul, L., Davidow, D., Stodter, A., Till, K., Dane, K., Jones, B., & Hendricks, S. (2023). More than rugby: A scoping review of coaches in rugby. International Journal of Sports Science & Coaching, 0(0). https://doi.org/10.1177/17479541231185558

Mental Fatigue Impairs Tackling Technique in Amateur Rugby Union Players

The aim of this study was to test the effects of a mentally fatiguing protocol on rugby union players’ tackling technique on both their dominant and non-dominant shoulders. 20 amateur rugby union players from the Western Province Super League A participated in this study. The study used a randomized, crossover, counterbalanced design. Players visited the laboratory twice: once for the non-Mental Fatigue condition (control) and then the Mental Fatigue condition. After a warmup, the players underwent the protocol. The protocol required each player to perform 4 sets of 6 tackles on the tackle simulator located at the University of Cape Town. Three tackles on the dominant shoulder and three tackles on the non-dominant shoulder were completed in random order. A lighting system that is mounted behind the tackle dummy flashed prior to the dummy being released to indicate which shoulder the player should tackle. After the baseline tackle set (the first set of tackles), the players in the Mental Fatigue condition performed a 30-minute Stroop Task, with two 5-minute Stroop top-ups after the next two sets. If players were completing the control condition, the players rested and were allowed to read magazines for the same time frame. At a later stage, each tackle was recorded and scored using a standardized list of technical criteria to determine how technically correct each tackle was. The authors found that mental fatigue can impair a rugby player’s tackle technique, and these impairments are greater when tackling on the non-dominant shoulder. The technical components that were significantly impaired by the mental fatigue protocol was “explosiveness (rapid movement) on contact.”  It is recommended that sport practitioners include a mental fatigue component into tackle training programmes to improve and develop tackle technique and capacity.

This study is published in International Journal of Sports Physiology and Performance.

Davidow, D., Smith, M., Ross, T., Laura James, G., Paul, L., Lambert, M., Jones, B., & Hendricks, S. (2023). Mental Fatigue Impairs Tackling Technique in Amateur Rugby Union Players. International Journal of Sports Physiology and Performance. https://doi.org/10.1123/ijspp.2023-0159

‘Body on the line’: experiences of tackle injury in women’s rugby union – a grounded theory study

The aim of this study was to describe and understand the tackle injury experiences and behaviours in women’s rugby union. This study undertook a qualitative grounded theory approach, which explores how and why women rugby union players behave in different contexts. Twenty-one women rugby union players were interviewed about their tackling injury experience from Canada, South Africa, and Europe. After the data analysis was completed, the findings were split into three categories: (1) embodied understandings of tackle injury; (2) gender and tackle injury risk and (3) influences on tackle injury behaviours. The authors found that within the rugby culture, players normalised pain and injury, which impacts the players physical and emotional health. Female rugby players desired respect and recognition from coaches and teammates to prove their place in rugby. Therefore, players often played through their injuries and ‘put their body on the line’. Furthermore, players would be rewarded for ‘putting their bodies on the line’. Players also reported that tackle experiences were filled with fear, stemming from being underprepared for the tackle. The authors recommended that tackle injury prevention should become a priority at all levels to ensure women have an inclusive and equal playing environment compared to their male counterparts.

This study is published in British Journal of Sports Medicine.

Dane K, Foley G, Wilson F (2023). ‘Body on the line’: experiences of tackle injury in women’s rugby union – a grounded theory study. British Journal of Sports Medicine. doi: 10.1136/bjsports-2022-106243

Rugby Science Update 8

Professional male rugby union players’ perceived psychological recovery and physical regeneration during the off-season

The aim of this study was to explain the phenomenon of psychological recovery and physical regeneration of male professional rugby union players during the off-season. The study used a qualitative approach to gather the beliefs and experiences of players regarding their mental and physical health and well-being across the off-season period and identify the psychological and physical strategies adopted to recover and regenerate in preparation for the upcoming season. The study interviewed 34 male professional players, and found that the off-season is characterised by three phases that players undergo to preserve their mental and physical health and well-being to recover from the previous season and regenerate in preparation for the upcoming season. These include decompression from previous season, cognitive detachment from the rugby environment and preparation for preseason. Successful progression through all three phases appears to be influenced by variables including the work and life demands a player is encountering at the time, contextual factors such as their health status (ie, currently injured or ill), and their level of experience in the sport (eg, previous experiences of the off-season). The authors recommend players should receive sufficient time (5–6 weeks) in the off-season to progress through the phases of recovery and regeneration to prepare for the upcoming season, with consideration for the impact of work and life demands, contextual factors and experience levels. Also, education should be provided to all stakeholders regarding the importance of the off-season period for well-being (recovery and regeneration), together with strategies that can be used to enhance the quality of this process (ie, physically distancing from work environment to support cognitive detachment from rugby, engaging in development activities that nourish holistic identity and personal skill development). Clinicians should also support, where appropriate, player subgroups at risk of threats to well-being and welfare in the off-season period (long term or recently injured and younger professionals).

This is study is published in BMJ Open Sport & Exercise Medicine and is open access. 

Mellalieu, S. D., Sellars, P., Arnold, R., Williams, S., Campo, M., & Lyons, D. (2023). Professional male rugby union players’ perceived psychological recovery and physical regeneration during the off-season. BMJ Open Sport & Exercise Medicine, 9(1), e001361.

Tackling sport-related concussion: effectiveness of lowering the maximum legal height of the tackle in amateur male rugby – a cross-sectional analytical study

The aim of this study was to investigate the effect of a tackle law variation that reduces the maximum legal tackle height from the line of the shoulder of the ball barrier, to the line of the armpit, on injury, head injury and sport-related concussion (SRC) incidence in amateur community rugby union. The study used a cross-sectional analytical design over the period 2018 (control) and 2019 (intervention) in a South African collegiate student rugby competition – which included 42 teams. Reducing the legal tackle height from the line of the shoulder to the armpit of the ball carrier in community amateur rugby showed a trend towards reducing injuries, head injuries and SRC, however, these injury trends were not statistically different.

This study is published in Injury Prevention and is open access.

Van Tonder, R., Starling, L., Surmon, S., Viviers, P., Kraak, W., Boer, P. H., … & Brown, J. C. (2023). Tackling sport-related concussion: effectiveness of lowering the maximum legal height of the tackle in amateur male rugby–a cross-sectional analytical study. Injury prevention, 29(1), 56-61.

Performance indicators associated with match outcome within the United Rugby Championship

This study had 3 aims  i) identify performance indicators associated with match outcomes in the United Rugby Championship (URC), ii) compare efficacy of isolated data and data relative to opposition in predicting match outcome, and iii) investigate whether reduced performance indicator statistical models can reproduce predictive accuracy. The study analysed 27 performance indicators from 96 matches during the 2020-2021 URC season. Five key performances indicators differentiated between winning and losing in the URC –  kicks from hand, metres made, clean breaks, turnovers conceded and scrum penalties. Kicking was highlighted as a key driver for match success, with the probability of winning higher for a team kicking more than their opposition. Also, team performance data are much more efficient at predicting match outcomes when expressed relative to the opposition’s performance.

This study is published in the Journal of Science and Medicine in Sport and is open access. 

Scott, G. A., Bezodis, N., Waldron, M., Bennett, M., Church, S., Kilduff, L. P., & Brown, M. R. (2023). Performance indicators associated with match outcome within the United Rugby Championship. Journal of Science and Medicine in Sport, 26(1), 63-68.

Rugby Science Update 7

Longitudinal study of six seasons of match injuries in elite female rugby union

The aim of this longitudinal study was to describe the incidence, severity and burden of match injuries in elite adult women’s rugby union. Secondary aims were to describe injuries in different positional groupings (forwards and backs) and to describe the type and location of, and game event responsible for, injuries. The study found the incidence of injury was similar to those previously reported for women’s international match play, while lower than the elite men’s competition. Both the mean and median severity of injury were higher than those reported in elite men’s rugby. Concussion was the most common injury diagnosis, with the incidence of concussion increasing over the study period. The tackle event was associated with the greatest burden of injury, with ‘being tackled’ specifically causing the most injuries and concussions.

The study is published in the British Journal of Sports Medicine.

Starling, L. T., Gabb, N., Williams, S., Kemp, S., & Stokes, K. A. (2022). Longitudinal study of six seasons of match injuries in elite female rugby union. British Journal of Sports Medicine. Online first. 

The relationship between physical characteristics and match collision performance among elite international female rugby union players

The aim of this study was to investigate which combination of anthropometric and physical abilities explained variance in match collision performance, using both effort and performance variables, in international female rugby union matches. The study collected physical performance and anthropometric data from fifty-one international female rugby union players, and analysed collision actions (categorised as “effort” or “performance” variables) from 20 international matches. Among forwards, acceleration momentum, body mass and skinfolds were positively associated with winning collisions and carrying the ball into contact more frequently, whilst tackle frequency was positively associated with relative leg strength and power output. For the backs, the ability to win collisions was positively associated with relative leg power output, and negatively associated with body mass. Tackle frequency was also associated with maximum upper- and lower-body strength.

This study is published in the European Journal of Sport Science. Woodhouse, L. N., Bennett, M., Tallent, J., Patterson, S. D., & Waldron, M. (2022). The relationship between physical characteristics and match collision performance among elite international female rugby union players. European Journal of Sport Science, 1-10.

Lay of the land: narrative synthesis of tackle research in rugby union and rugby sevens

The purpose of this review was to synthesise both injury prevention and performance tackle-related research to provide rugby stakeholders with information on tackle injury epidemiology, including tackle injury risk factors and performance determinants, and to discuss measures that may improve tackle performance while reducing the risk of tackle injuries. Using a systematic review approach, a total of 177 rugby union studies and 13 rugby sevens studies were identified. The review found that the tackle consistently accounted for more than 50% of all injuries in rugby union and rugby sevens, both at the professional level and at the lower levels, with the rate of tackle injuries higher at the professional level (mean 32/1000 player-hours) compared with the lower levels (mean 17/1000 player- hours). Also, the frequencies of injury between the ball carrier and tackler were not largely dissimilar. A player’s tackle actions and technical ability was also highlighted as a major risk factor for injury and a key determinant of performance. While studies have used evidence-based education, or proposed progressive tackle technique training and law changes to modify player tackle actions and technical ability, it was noted that all three modifiers working in unison (as oppose to separately) will have a higher potential at reducing tackle injury risk while enhancing performance. With the guidance of tackle injury and performance studies, as well as stakeholder engagement, experiential and explorative tackle research also has potential to inspire innovative tackle injury prevention and performance strategies.

This is review is published in the BMJ Open Sport & Exercise Medicine and is open access. 

Burger, N., Lambert, M., & Hendricks, S. (2020). Lay of the land: narrative synthesis of tackle research in rugby union and rugby sevens. BMJ open sport & exercise medicine, 6(1), e000645.