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A comparison of rolling averages versus discrete time epochs for assessing the worst-case scenario locomotor demands of professional soccer match-play.

Fereday, K., Hills, S. P., Russell, M., Smith, J., Cunningham, D.J., Shearer, D., McNarry, M. and Kilduff, L.P., 2020. A comparison of rolling averages versus discrete time epochs for assessing the worst-case scenario locomotor demands of professional soccer match-play. Journal of Science and Medicine in Sport, 23 (8), 764 - 769.

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DOI: 10.1016/j.jsams.2020.01.002

Abstract

OBJECTIVES: To compare fixed epochs (FIXED) and rolling averages (ROLL) for quantifying worst-case scenario ('peak') running demands during professional soccer match-play, whilst assessing contextual influences. DESIGN: Descriptive, observational. METHODS: Twenty-five outfield players from an English Championship soccer club wore 10-Hz microelectromechanical systems during 28 matches. Relative total and high-speed (>5.5ms-1) distances were averaged over fixed and rolling 60-s to 600-s epochs. Linear mixed models compared FIXED versus ROLL and assessed the influence of epoch length, playing position, starting status, match result, location, formation, and time-of-day. RESULTS: Irrespective of playing position or epoch duration, FIXED underestimated ROLL for total (∼7-10%) and high-speed (∼12-25%) distance. In ROLL, worst-case scenario relative total and high-speed distances reduced from 190.1±20.4mmin-1 and 59.5±23.0mmin-1 in the 60-s epoch, to 120.9±13.1mmin-1 and 14.2±6.5mmin-1 in the 600-s epoch, respectively. Worst-case scenario total distance was higher for midfielders (∼9-16mmin-1) and defenders (∼3-10mmin-1) compared with attackers. In general, starters experienced higher worst-case scenario total distance than substitutes (∼3.6-8.5mmin-1), but lower worst-case scenario high-speed running over 300-s (∼3mmin-1). Greater worst-case scenario total and high-speed distances were elicited during wins (∼7.3-11.2mmin-1 and ∼2.7-7.9mmin-1, respectively) and losses (∼2.7-5.7mmin-1 and ∼1.4-2.2mmin-1, respectively) versus draws, whilst time-of-day and playing formation influenced worst-case scenario high-speed distances only. CONCLUSIONS: These data indicate an underestimation of worst-case scenario running demands in FIXED versus ROLL over 60-s to 600-s epochs while highlighting situational influences. Such information facilitates training specificity by enabling sessions to be targeted at the most demanding periods of competition.

Item Type:Article
ISSN:1440-2440
Uncontrolled Keywords:Activity profiles ; Fatigue ; Football ; Monitoring ; Physiology ; Running ; Adult ; Athletic Performance ; Geographic Information Systems ; Humans ; Linear Models ; Running ; Soccer ; Time Factors ; Time and Motion Studies ; Young Adult
Group:Faculty of Health & Social Sciences
ID Code:35603
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:10 Jun 2021 09:15
Last Modified:15 Aug 2021 08:29

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