Impact of Sudden Rule Changes on Player Injuries and Performance: Insights from Australian Football.

Wing, C; Hart, NH; Ma'ayah, F; Nosaka, K

Impact of Sudden Rule Changes on Player Injuries and Performance: Insights from Australian Football.

Wing, C Hart, NH Ma'ayah, F Nosaka, K

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Publisher:: University of Uludag
Publication Type:: Journal Article
Citation:: Journal of Sports Science and Medicine, 2022, 21, (3), pp. 458-464
Issue Date:: 2022-09

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Field	Value	Language
dc.contributor.author	Wing, C
dc.contributor.author	Hart, NH
dc.contributor.author	Ma'ayah, F
dc.contributor.author	Nosaka, K
dc.date.accessioned	2022-11-14T03:37:30Z
dc.date.available	2022-08-26
dc.date.available	2022-11-14T03:37:30Z
dc.date.issued	2022-09
dc.identifier.citation	Journal of Sports Science and Medicine, 2022, 21, (3), pp. 458-464
dc.identifier.issn	1303-2968
dc.identifier.issn	1303-2968
dc.identifier.uri	http://hdl.handle.net/10453/163436
dc.description.abstract	This study investigated the effects of reduced quarter time due to COVID-19 pandemic rule changes, on running performance and injuries in Australian Football. Microsensor data for eight matches performed by the same 17 players were compared between the 2019 (standard) and 2020 (COVID-19) seasons using linear and generalised mixed models. Injury rates were assessed in 34 players across the full 2019 season, and 32 players across the full 2020 season. The total distance (ES = 1.28 [0.55 to 2.02]), high-speed (>18 km/h) (ES = 0.44 [-0.24 to 1.12]) and very highspeed (>24 km/h) (ES = 0.27 [-0.41 to 0.94]) distances, PlayerLoad™ (ES = 0.96 [0.25 to 1.67]), high-intensity efforts (ES = 0.48 [-0.20 to 1.16]), and accelerations (ES = 0.33 [-0.34 to 1.01]) were smaller (p ≤ 0.01) for the 2020 than the 2019 season. Expressed relative to playing time, distance (ES=-0.38 [-1.06 to 0.30]), PlayerLoad™ (ES = -0.27 [-0.94 to 0.41]), and acceleration efforts (ES = -0.50 [-1.18 to 0.18]) were greater (p < 0.05) for the 2020 than the 2019 season. No significant differences in maximum ball-in-play periods nor the difference between the 1st and 4th quarters were evident. Injury rates remained similar between 2019 (3.36 per game) and 2020 (3.55 per game). However, the proportion of injuries that led to lost time (missed games) was greater for the 2020 (38%) than 2019 season (24%). The changes in the rules had a profound impact on player performance and increased the likelihood of time loss injuries.
dc.format	Electronic-eCollection
dc.language	eng
dc.publisher	University of Uludag
dc.relation.ispartof	Journal of Sports Science and Medicine
dc.relation.isbasedon	10.52082/jssm.2022.458
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0913 Mechanical Engineering, 1106 Human Movement and Sports Sciences, 1701 Psychology
dc.subject.classification	Sport Sciences
dc.subject.mesh	Athletic Performance
dc.subject.mesh	Australia
dc.subject.mesh	COVID-19
dc.subject.mesh	Football
dc.subject.mesh	Geographic Information Systems
dc.subject.mesh	Humans
dc.subject.mesh	Pandemics
dc.subject.mesh	Athletic Performance
dc.subject.mesh	Australia
dc.subject.mesh	COVID-19
dc.subject.mesh	Football
dc.subject.mesh	Geographic Information Systems
dc.subject.mesh	Humans
dc.subject.mesh	Pandemics
dc.subject.mesh	Humans
dc.subject.mesh	Football
dc.subject.mesh	Geographic Information Systems
dc.subject.mesh	Australia
dc.subject.mesh	Athletic Performance
dc.subject.mesh	Pandemics
dc.subject.mesh	COVID-19
dc.title	Impact of Sudden Rule Changes on Player Injuries and Performance: Insights from Australian Football.
dc.type	Journal Article
utslib.citation.volume	21
utslib.location.activity	Turkey
utslib.for	0913 Mechanical Engineering
utslib.for	1106 Human Movement and Sports Sciences
utslib.for	1701 Psychology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Health
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-11-14T03:37:28Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	21
utslib.citation.issue	3

Abstract:

This study investigated the effects of reduced quarter time due to COVID-19 pandemic rule changes, on running performance and injuries in Australian Football. Microsensor data for eight matches performed by the same 17 players were compared between the 2019 (standard) and 2020 (COVID-19) seasons using linear and generalised mixed models. Injury rates were assessed in 34 players across the full 2019 season, and 32 players across the full 2020 season. The total distance (ES = 1.28 [0.55 to 2.02]), high-speed (>18 km/h) (ES = 0.44 [-0.24 to 1.12]) and very highspeed (>24 km/h) (ES = 0.27 [-0.41 to 0.94]) distances, PlayerLoad™ (ES = 0.96 [0.25 to 1.67]), high-intensity efforts (ES = 0.48 [-0.20 to 1.16]), and accelerations (ES = 0.33 [-0.34 to 1.01]) were smaller (p ≤ 0.01) for the 2020 than the 2019 season. Expressed relative to playing time, distance (ES=-0.38 [-1.06 to 0.30]), PlayerLoad™ (ES = -0.27 [-0.94 to 0.41]), and acceleration efforts (ES = -0.50 [-1.18 to 0.18]) were greater (p < 0.05) for the 2020 than the 2019 season. No significant differences in maximum ball-in-play periods nor the difference between the 1st and 4th quarters were evident. Injury rates remained similar between 2019 (3.36 per game) and 2020 (3.55 per game). However, the proportion of injuries that led to lost time (missed games) was greater for the 2020 (38%) than 2019 season (24%). The changes in the rules had a profound impact on player performance and increased the likelihood of time loss injuries.

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http://hdl.handle.net/10453/163436