Motion analysis of elite Polish soccer goalkeepers throughout a season.

Content Provider	Europe PMC
Author	Szwarc, Andrzej Jaszczur-Nowicki, Jaroslaw Aschenbrenner, Piotr Zasada, Mariusz Padulo, Johnny Lipinska, Patrycja
Copyright Year	2019
Abstract	The study aims were to determine the distance covered by goalkeepers during matches in the context of game duration and result, to identify the area of their most frequent activity, and to assess goalkeepers’ involvement in games finished with a win, draw, or loss. The investigation was based on two innovative tools: the goalkeeper’s activity index (GAI) and an analysis of 5-min periods. A video tracking system was used to monitor 17 goalkeepers from Polish National League teams during 15 matches. The GAI was applied to assess their involvement in the game. Elite goalkeepers covered 72.7%, 25.8%, and 2.5% of the distance during the game by walking/jogging, running, and sprinting, respectively. The distances covered in lost, won, and drawn matches turned out similar (mean ± SD: 4800 ± 906 m, 4696 ± 1033 m, and 4660 ± 754 m, respectively). There were no significant differences between the distances covered in the first and second halves. The area of most frequent activity was the middle sector of the penalty area between the goal and penalty area lines. ANOVA results showed that in drawn matches, goalkeepers’ activity significantly differed in mean values of the GAI in comparison with that in won and lost games (p = 0.034, p = 0.039, respectively). It was noted that goalkeepers tended to intervene more often in games where their team was winning rather than in those with a losing result. Their direct involvement in defending the goal was the lowest in drawn games.
Related Links	https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC6945045&blobtype=pdf
ISSN	0860021X
Journal	Biology of Sport [Biol Sport]
Volume Number	36
DOI	10.5114/biolsport.2019.88758
PubMed Central reference number	PMC6945045
Issue Number	4
PubMed reference number	31938007
e-ISSN	20831862
Language	English
Publisher	Institute of Sport in Warsaw
Publisher Date	2019-10-31
Access Restriction	Open
Rights License	This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License, permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright © Biology of Sport 2019
Subject Keyword	Football Video analysis Activity profile Performance index Match outcome
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physiology (medical) Physical Therapy, Sports Therapy and Rehabilitation Sports Science