Phases of match-play in professional Australian Football: Descriptive analysis and reliability assessment

Rennie, MJ; Watsford, ML; Spurrs, RW; Kelly, SJ; Pine, MJ

Phases of match-play in professional Australian Football: Descriptive analysis and reliability assessment

Rennie, MJ

Watsford, ML

Spurrs, RW Kelly, SJ Pine, MJ

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Publication Type:: Journal Article
Citation:: Journal of Science and Medicine in Sport, 2018, 21 (6), pp. 635 - 639
Issue Date:: 2018-06-01

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Field	Value	Language
dc.contributor.author	Rennie, MJ https://orcid.org/0000-0001-5590-139X	en_US
dc.contributor.author	Watsford, ML https://orcid.org/0000-0002-4569-6377	en_US
dc.contributor.author	Spurrs, RW	en_US
dc.contributor.author	Kelly, SJ	en_US
dc.contributor.author	Pine, MJ	en_US
dc.date.available	2017-10-14	en_US
dc.date.issued	2018-06-01	en_US
dc.identifier.citation	Journal of Science and Medicine in Sport, 2018, 21 (6), pp. 635 - 639	en_US
dc.identifier.issn	1440-2440	en_US
dc.identifier.uri	http://hdl.handle.net/10453/125494
dc.description.abstract	© 2017 Sports Medicine Australia Objectives: To examine the frequency and time spent in the phases of Australian Football (AF) match-play and to assess the intra-assessor reliability of coding these phases of match-play. Design: Observational, intra-reliability assessment. Methods: Video footage of 10 random quarters of AF match-play were coded by a single researcher. Phases of offence, defence, contested play, umpire stoppage, set shot and goal reset were coded using a set of operational definitions. Descriptive statistics were provided for all phases of match-play. Following a 6-month washout period, intra-coder reliability was assessed using typical error of measurement (TEM) and intra-class correlation coefficients (ICC). Results: A quarter of AF match-play involved 128 ± 20 different phases of match-play. The highest proportion of match-play involved contested play (25%), followed by offence (18%), defence (18%) and umpire stoppages (18%). The mean duration of offence, defence, contested play, umpire stoppage, set shot and goal reset were 14, 14, 10, 11, 28 and 47 s, respectively. No differences were found between the two coding assessments (p > 0.05). ICCs for coding the phases of play demonstrated very high reliability (r = 0.902–0.992). TEM of the total time spent in each phase of play represented moderate to good reliability (TEM = 1.8–9.3%). Coding of offence, defence and contested play tended to display slightly poorer TEMs than umpire stoppages, set shots and goal resets (TEM = 8.1 vs 4.5%). Conclusions: Researchers can reliably code the phases of AF match-play which may permit the analysis of specific elements of competition.	en_US
dc.relation.ispartof	Journal of Science and Medicine in Sport	en_US
dc.relation.isbasedon	10.1016/j.jsams.2017.10.021	en_US
dc.subject.classification	Sport Sciences	en_US
dc.subject.mesh	Humans	en_US
dc.subject.mesh	Football	en_US
dc.subject.mesh	Video Recording	en_US
dc.subject.mesh	Adult	en_US
dc.subject.mesh	Australia	en_US
dc.subject.mesh	Athletic Performance	en_US
dc.subject.mesh	Young Adult	en_US
dc.title	Phases of match-play in professional Australian Football: Descriptive analysis and reliability assessment	en_US
dc.type	Journal Article
utslib.citation.volume	6	en_US
utslib.citation.volume	21	en_US
utslib.for	1106 Human Movement and Sports Sciences	en_US
utslib.for	1117 Public Health and Health Services	en_US
utslib.for	1116 Medical Physiology	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Health
pubs.organisational-group	/University of Technology Sydney/Faculty of Health/Sports and Exercise Science
pubs.organisational-group	/University of Technology Sydney/Strength - CHSP - Health Services and Practice
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	closed_access
pubs.issue	6	en_US
pubs.publication-status	Published	en_US
pubs.volume	21	en_US

Abstract:

© 2017 Sports Medicine Australia Objectives: To examine the frequency and time spent in the phases of Australian Football (AF) match-play and to assess the intra-assessor reliability of coding these phases of match-play. Design: Observational, intra-reliability assessment. Methods: Video footage of 10 random quarters of AF match-play were coded by a single researcher. Phases of offence, defence, contested play, umpire stoppage, set shot and goal reset were coded using a set of operational definitions. Descriptive statistics were provided for all phases of match-play. Following a 6-month washout period, intra-coder reliability was assessed using typical error of measurement (TEM) and intra-class correlation coefficients (ICC). Results: A quarter of AF match-play involved 128 ± 20 different phases of match-play. The highest proportion of match-play involved contested play (25%), followed by offence (18%), defence (18%) and umpire stoppages (18%). The mean duration of offence, defence, contested play, umpire stoppage, set shot and goal reset were 14, 14, 10, 11, 28 and 47 s, respectively. No differences were found between the two coding assessments (p > 0.05). ICCs for coding the phases of play demonstrated very high reliability (r = 0.902–0.992). TEM of the total time spent in each phase of play represented moderate to good reliability (TEM = 1.8–9.3%). Coding of offence, defence and contested play tended to display slightly poorer TEMs than umpire stoppages, set shots and goal resets (TEM = 8.1 vs 4.5%). Conclusions: Researchers can reliably code the phases of AF match-play which may permit the analysis of specific elements of competition.

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http://hdl.handle.net/10453/125494