Wearable microtechnology can accurately identify collision events during professional rugby league match-play

Journal article


Hulin, Billy T., Gabbett, Tim J., Johnston, Rich D. and Jenkins, David G.. (2017). Wearable microtechnology can accurately identify collision events during professional rugby league match-play. Journal of Science and Medicine in Sport. 20(7), pp. 638-642. https://doi.org/10.1016/j.jsams.2016.11.006
AuthorsHulin, Billy T., Gabbett, Tim J., Johnston, Rich D. and Jenkins, David G.
Abstract

Objectives
Collision frequency during rugby league matches is associated with team success, greater and longer lasting fatigue and increased injury risk. This study researched the sensitivity and specificity of microtechnology to count collision events during rugby league matches.

Design
Diagnostic accuracy study.

Methods
While wearing a microtechnology device (Catapult, S5), eight professional rugby league players were subjected to a total of 380 collision events during matches. Video footage of each match was synchronised with microtechnology data. The occurrence of each collision event was coded in comparison with whether that event was or was not detected by microtechnology.

Results
Microtechnology detected 371 true-positive collision events (sensitivity = 97.6 ± 1.5%). When low-intensity (<1 PlayerLoad AU), short duration (<1 s) events were excluded from the analysis, specificity was 91.7 ± 2.5%, accuracy was 92.7 ± 1.3%, positive likelihood ratio was 11.4 ×/÷ 1.4 and the typical error of estimate was 7.8% ×/÷ 1.9 (d = 0.29 ×/÷ 1.9, small). Microtechnology collisions were strongly and positively correlated with video coded collision events (r = 0.96). The ability of microtechnology to detect collision events improved as the intensity and duration of the collision increased.

Conclusions
Microtechnology can identify 97.6% of collision events during rugby league match-play. The typical error associated with measuring contact events can be reduced to 7.8%, with accuracy (92.7%) and specificity (91.7%) improving, when low-intensity (<1 PlayerLoad AU) and short duration (<1 s) collision reports are excluded. This provides practitioners with a measurement of contact workload during professional rugby league matches.

Keywordsworkload; training load; validity; sensitivity; specificity
Year2017
JournalJournal of Science and Medicine in Sport
Journal citation20 (7), pp. 638-642
PublisherElsevier Ltd
ISSN1440-2440
Digital Object Identifier (DOI)https://doi.org/10.1016/j.jsams.2016.11.006
Scopus EID2-s2.0-85011005129
Open accessPublished as green open access
Page range638-642
Research GroupSports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre
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Output statusPublished
Publication dates
Online23 Jan 2017
Publication process dates
Accepted21 Nov 2016
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Gabbett, Timothy, Ullah, Shahid, Jenkins, David and Abernethy, Bruce. (2012). Skill qualities as risk factors for contact injury in professional rugby league players. Journal of Sports Sciences. 30(13), pp. 1421 - 1427. https://doi.org/10.1080/02640414.2012.710760
Physical demands of professional rugby league training and competition using microtechnology
Gabbett, Tim, Jenkins, David G. and Abernethy, Bruce. (2012). Physical demands of professional rugby league training and competition using microtechnology. Journal of Science and Medicine in Sport. 15(1), pp. 86 - 86. https://doi.org/10.1016/j.jsams.2011.07.004
Influence of field size on the physiological and skill demands of small-sided games in junior and senior rugby league players
Gabbett, Tim, Abernethy, Bruce and Jenkins, David G.. (2012). Influence of field size on the physiological and skill demands of small-sided games in junior and senior rugby league players. Journal of Strength and Conditioning Research. 26(2), pp. 487 - 491. https://doi.org/10.1519/JSC.0b013e318225a371
Physical collisions and injury in professional rugby league match-play
Gabbett, Tim, Jenkins, David G. and Abernethy, Bruce. (2011). Physical collisions and injury in professional rugby league match-play. Journal of Science and Medicine in Sport. 14(3), pp. 210 - 215. https://doi.org/10.1016/j.jsams.2011.01.002
Relationships between physiological, anthropometric, and skill qualities and playing performance in professional rugby league players
Gabbett, Tim, Jenkins, D G. and Abernethy, B.. (2011). Relationships between physiological, anthropometric, and skill qualities and playing performance in professional rugby league players. Journal of Sports Sciences. 29(15), pp. 1655 - 1664. https://doi.org/10.1080/02640414.2011.610346
Correlates of tackling ability in high-performance rugby league players
Gabbett, Tim J., Jenkins, D. G. and Abernethy, B.. (2011). Correlates of tackling ability in high-performance rugby league players. Journal of Strength and Conditioning Research. 25(1), pp. 72 - 79. https://doi.org/10.1519/JSC.0b013e3181ff506f
Tackling in a professional rugby league
Austin, Damien J., Gabbett, Tim and Jenkins, David G.. (2011). Tackling in a professional rugby league. Journal of Strength and Conditioning Research. 25(6), pp. 1659 - 1663. https://doi.org/10.1519/JSC.0b013e3181da781c
Relationship between training load and injury in professional rugby league players
Gabbett, Tim and Jenkins, David G.. (2011). Relationship between training load and injury in professional rugby league players. Journal of Science and Medicine in Sport. 14(3), pp. 204 - 209. https://doi.org/10.1016/j.jsams.2010.12.002
Relative importance of physiological, anthropometric, and skill qualities to team selection in professional rugby league
Gabbett, Tim, Jenkins, David G. and Abernethy, Bruce. (2011). Relative importance of physiological, anthropometric, and skill qualities to team selection in professional rugby league. Journal of Sports Sciences. 29(13), pp. 1453 - 1461. https://doi.org/10.1080/02640414.2011.603348
The physical demands of Super 14 rugby union
Austin, Damien, Gabbett, Timothy James and Jenkins, David. (2011). The physical demands of Super 14 rugby union. Journal of Science and Medicine in Sport. 14(3), pp. 259 - 263. https://doi.org/10.1016/j.jsams.2011.01.003
Physiological and skill demands of 'on-side' and 'off-side' games
Gabbett, Timothy James, Jenkins, David and Abernethy, Bruce. (2010). Physiological and skill demands of 'on-side' and 'off-side' games. Journal of Strength and Conditioning Research. 24(1), pp. 2979 - 2983. https://doi.org/10.1519/JSC.0b013e3181e72731
Physical collisions and injury during professional rugby league skills training
Gabbett, Timothy James, Jenkins, David and Abernethy, Bruce. (2010). Physical collisions and injury during professional rugby league skills training. Journal of Science and Medicine in Sport. 13(6), pp. 578 - 583. https://doi.org/10.1016/j.jsams.2010.03.007
Training loads and incidence of injury during the pre-season in professional rugby league players
Killen, Natasha, Gabbett, Timothy James and Jenkins, David. (2010). Training loads and incidence of injury during the pre-season in professional rugby league players. Journal of Strength and Conditioning Research. 24(8), pp. 2079 - 2084. https://doi.org/10.1519/JSC.0b013e3181ddafff
Physiological and anthropometric correlates of tackling ability in junior elite and subelite rugby league players
Gabbett, Timothy James, Jenkins, David and Abernethy, Bruce. (2010). Physiological and anthropometric correlates of tackling ability in junior elite and subelite rugby league players. Journal of Strength and Conditioning Research. 24(11), pp. 2989 - 2995. https://doi.org/10.1519/JSC.0b013e3181f00d22
A time-motion analysis of professional rugby league match-play
King, Trish, Jenkins, David G. and Gabbett, Timothy James. (2009). A time-motion analysis of professional rugby league match-play. Journal of Sports Sciences. 27(3), pp. 213 - 219. https://doi.org/10.1080/02640410802538168
Game-based training for improving skill and physical fitness in team sport athletes
Gabbett, Tim, Jenkins, David and Abernethy, Bruce. (2009). Game-based training for improving skill and physical fitness in team sport athletes. International Journal of Sports Science and Coaching. 4(2), pp. 273 - 283.
Applied physiology of rugby league
Gabbett, Timothy James, King, Trish and Jenkins, David G.. (2008). Applied physiology of rugby league. Sports Medicine: reviews of applied medicine and science in sport and exercise. 38(2), pp. 119 - 138. https://doi.org/10.2165/00007256-200838020-00003
Physical activity of young people in the Torres Strait and Northern Peninsula Region: An exploratory study
Abbott, Rebecca, Jenkins, David, Haswell-Elkins, Melissa, Fell, Karla, MacDonald, Doune and Cerin, Ester. (2008). Physical activity of young people in the Torres Strait and Northern Peninsula Region: An exploratory study. Australian Journal of Rural Health. 16(5), pp. 278 - 282. https://doi.org/10.1111/j.1440-1584.2008.00979.x
Physical activity of young children
Ziviani, Jenny, MacDonald, Doune, Jenkins, David, Rodger, Sylvia, Batch, Jenny and Cerin, Ester. (2006). Physical activity of young children. Occupation Participation and Health. 26(1), pp. 4 - 14. https://doi.org/10.1177/153944920602600102
Muscle metabolism during sprint exercise in man: Influence of sprint training
Barnett, C., Carey, M., Proietto, J., Cerin, Ester, Febbraio, M A. and Jenkins, David. (2004). Muscle metabolism during sprint exercise in man: Influence of sprint training. Journal of Science and Medicine in Sport. 7(3), pp. 314 - 322. https://doi.org/10.1016/S1440-2440(04)80026-4