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Does player unavailability affect football teams match physical outputs? A two-season study of the UEFA champions league
Univ British Columbia, Canada.
Linköping University, Department of Medical and Health Sciences, Division of Community Medicine. Linköping University, Faculty of Medicine and Health Sciences.
Univ British Columbia, Canada.
Edinburgh Napier Univ, Scotland; Arsenal Football Club, England.
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2018 (English)In: Journal of Science and Medicine in Sport, ISSN 1440-2440, E-ISSN 1878-1861, Vol. 21, no 5, p. 525-532Article in journal (Refereed) Published
Abstract [en]

Objectives: Player unavailability negatively affects team performance in elite football. However, whether player unavailability and its concomitant performance decrement is mediated by any changes in teams match physical outputs is unknown. We examined whether the number of players injured (i.e. unavailable for match selection) was associated with any changes in teams physical outputs. Design: Prospective cohort study. Methods: Between-team variation was calculated by correlating average team availability with average physical outputs. Within-team variation was quantified using linear mixed modelling, using physical outputs - total distance, sprint count (efforts over20 km/h), and percent of distance covered at high speeds (amp;gt;14 km/h) - as outcome variables, and player unavailability as the independent variable of interest. To control for other factors that may influence match physical outputs, stage (group stage/knockout), venue (home/away), score differential, ball possession (%), team ranking (UEFA Club Coefficient), and average team age were all included as covariates. Results: Teams average player unavailability was positively associated with the average number of sprints they performed in matches across two seasons. Multilevel models similarly demonstrated that having 4 unavailable players was associated with 20.8 more sprints during matches in 2015/2016, and with an estimated 0.60-0.77% increase in the proportion of total distance run above 14 km/h in both seasons. Player unavailability had a possibly positive and likely positive association with total match distances in the two respective seasons. Conclusions: Having more players injured and unavailable for match selection was associated with an increase in teams match physical outputs. (C) 2017 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD , 2018. Vol. 21, no 5, p. 525-532
Keywords [en]
Athletic injuries; Sports medicine; Soccer; Athletic performance
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:liu:diva-148394DOI: 10.1016/j.jsams.2017.08.007ISI: 000432230800018PubMedID: 28866111OAI: oai:DiVA.org:liu-148394DiVA, id: diva2:1218584
Note

Funding Agencies|UEFA; National Centre for Research in Sports; Canadian Institutes of Health Research

Available from: 2018-06-14 Created: 2018-06-14 Last updated: 2018-06-14

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • vancouver
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  • Other style
More styles
Language
  • de-DE
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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