Video analysis of tackles in professional rugby league matches by player position, tackle height and tackle location

King, Doug; Hume, Amanda; Clark, Trevor

doi:10.1080/24748668.2010.11868519

Cited by 34 publications

(47 citation statements)

References 18 publications

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“…Of the 6 coded plays or situations in which the CIR was used, the hitup (82 % of cases) was the only play that accounted for more than 10 % of the CIR use. Previous studies have shown that forwards are involved in tackles more frequently than other playing positions [3,15]. Both of these findings were also consistent with the prior video analysis of NRL players [7].…”

Section: Inter-rater Reliability (Irr)supporting

confidence: 89%

“…Therefore, a third rater was used to facilitate a consensus decision for the frequency calculations in 14 cases. frequency of tackles each playing position was involved in) [3,4,15]. Of the 6 coded plays or situations in which the CIR was used, the hitup (82 % of cases) was the only play that accounted for more than 10 % of the CIR use.…”

Section: Inter-rater Reliability (Irr)mentioning

confidence: 99%

“…King and colleagues examined the locations on the field in which tackles occurred during NYC matches (i. e., a total of 18 084 tackles). The percentages of tackles that occurred in playing zones were as follows: midfield defensive quarter = 39 %, defensive quarter = 14 %, midfield attacking quarter = 27 %, and attacking quarter = 18 % [15]. The field locations in the present study in which the CIR was used were as follows: midfield defensive quarter = 36 %, defensive quarter = 17 %, midfield attacking quarter = 25 %, and attacking quarter = 22 %.…”

Section: Inter-rater Reliability (Irr)mentioning

confidence: 99%

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Usefulness of Video Review of Possible Concussions in National Youth Rugby League

2016

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A new concussion interchange rule (CIR) was introduced in 2014 for the National Rugby League and National Youth Competition (NYC). The CIR allows a player suspected of having sustained a concussion to be removed from play and assessed without an interchange being tallied against the player's team. Participants included all NYC players who used the CIR during the 2014 season. 2 raters completed video analysis of 131 (of a total of 156 reported) uses of the CIR, describing injury characteristics, situational factors, and concussion signs. The incidence rate was 44.9 (95% CI: 38.5-52.3) uses of the CIR per 1 000 NYC player match hours, or approximately one CIR use every 1.3 games. Apparent loss of consciousness/unresponsiveness was observed in 13% of cases, clutching the head in 65%, unsteadiness of gait in 60%, and a vacant stare in 23%. Most incidences occurred from a hit-up (82%). There appeared to be some instances of video evidence of injury but the athlete was cleared to return to play in the same game. Video review appears to be a useful adjunct for identifying players suffering possible concussion. Further research is required on the usefulness of video review for identifying signs of concussive injury.

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Section: Inter-rater Reliability (Irr)supporting

confidence: 89%

Section: Inter-rater Reliability (Irr)mentioning

confidence: 99%

Section: Inter-rater Reliability (Irr)mentioning

confidence: 99%

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Usefulness of Video Review of Possible Concussions in National Youth Rugby League

2016

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“…walking, jogging) [3]. As a result of these activities, participants often experience between 29 and 74 physical collisions (tackles and ball-carries) per game [4,5]. These collisions carry an inherent risk of injury, including concussion [1], as impacts to the body and head occur frequently [6].…”

Section: Introductionmentioning

confidence: 99%

Head impact exposure comparison between male and female amateur rugby league participants measured with an instrumented patch

King¹,

Pa²,

Cummins³

et al. 2019

J Sports Med Ther

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Background: Epidemiological studies report that females experience greater rates of concussion when compared with males. Biomechanical factors may result in greater post-impact head velocities and accelerations for a given force for females when compared with males.Purpose: To quantify the magnitude, frequency, duration and distribution of impacts to the head and body in rugby league match activities for females versus males.Design: Prospective descriptive epidemiological study.Methods: 21 female and 35 male amateur rugby league players wore wireless impact measuring devices (X2Biosystems; xPatch) behind their right ear over the mastoid process during match participation across a single season. All impact data were collected and downloaded for further analysis.Results: Male amateur rugby league players experienced more head impacts than female amateur rugby league players (470 ±208 vs. 184 ±18; t (12) =-3.7; p=0.0028; d=1.94) per-match over the duration of the study. Male amateur rugby league players recorded a higher median resultant Peak Linear Acceleration (PLA(g)) (15.4 vs. 14.6 g; F (824,834) =51.6; p<0.0001; t (1658) =-3.3; p=0.0012; d=0.10) but a lower median resultant Peak Rotational Acceleration (PRA(rad/s 2 ) (2,802.3 vs. 2,886.3 rad/s 2 ; F (831,827) =3.1; p<0.0001; t (1658) =5.7; p<0.0001; d=0.13) when compared with female amateur rugby league players Conclusion: Females recorded lower median values for PLA(g) and Head Impact Telemetry severity profi le (HIT SP ) for all positional groups but had a higher PRA(rad/s 2 ) for Hit-up Forwards (HUF) and Outside Backs (OSB's) when compared with male HUF and OSB's. Females also recorded more impacts to the side of the head (48% vs. 42%) and had a higher 95 th percentile resultant PRA(rad/s 2 ) (12,015 vs. 9,523 rad/s 2 ) to the top of the head when compared with male rugby league players.

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“…2 As a result of these activities, players can experience 29 to 74 physical collisions (tackles and ball-carries) per game. 3,4 From these physical collisions there is an inherent risk of injury , including concussion 5 to the players involved, as impacts to the body and head happen. 1 A pooled analysis of rugby league concussions 6 reported an incidence of 7.7 per 1000 match hours.…”

Section: Introductionmentioning

confidence: 99%

Head impact exposure from match participation in women’s rugby league over one season of domestic competition

King

Hume

Gissane³

et al. 2018

Journal of Science and Medicine in Sport

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Our cohort of 21 female rugby league athletes were exposed to repetitive sub-concussive head impact exposure with an average of 14 impacts per-player per-match. Forwards were exposed to more impacts per-match than backs and these impacts were of higher magnitude. Most impacts occurred on the side of the head and were sustained during the second half of the game. Clinicians, coaches and players should be aware of the rates and magnitude of head impacts in female rugby league athletes.

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Video analysis of tackles in professional rugby league matches by player position, tackle height and tackle location

Abstract: Special thanks to David Perry for access to the Sports Performer video analysis software used for this study.

Cited by 34 publications

References 18 publications

Usefulness of Video Review of Possible Concussions in National Youth Rugby League

Usefulness of Video Review of Possible Concussions in National Youth Rugby League

Head impact exposure comparison between male and female amateur rugby league participants measured with an instrumented patch

Head impact exposure from match participation in women’s rugby league over one season of domestic competition

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