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

作者：Kieran Fereday, Samuel P. Hills, M. Russell, Jordan Smith, D. Cunningham, D. Shearer, M. Mcnarry, L. Kilduff · 发表于：Journal of Science and Medicine in Sport · 年份：2020 · DOI：10.1016/j.jsams.2020.01.002 · 被引用次数：79 · 研究领域：Medicine、Mathematics

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 (>5.5 m s-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 ± 20.4 m min-1 and 59.5 ± 23.0 m min-1 in the 60-s epoch, to 120.9 ± 13.1 m min-1 and 14.2 ± 6.5 m min-1 in the 600-s epoch, respectively. Worst-case scenario total distance was higher for midfielders (∼9-16 m min-1) and defenders (∼3-10 m min-1) compared with attackers. In general, starters experienced higher worst-case scenario total distance than substitutes (∼3.6-8.5 m min-1), but lower worst-case scenario high-speed running over 300-s (∼3 m min-1). Greater worst-case scenario total and high-speed distances were elicited during wins (∼7.3-11.2 m min-1 and ∼2.7-7.9 m min-1, respect...