{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T15:54:15Z","timestamp":1770738855218,"version":"3.49.0"},"reference-count":33,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2020,3,4]],"date-time":"2020-03-04T00:00:00Z","timestamp":1583280000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100010434","name":"\u201cla Caixa\u201d Foundation","doi-asserted-by":"publisher","award":["LCF\/PR\/PR18\/51130008"],"award-info":[{"award-number":["LCF\/PR\/PR18\/51130008"]}],"id":[{"id":"10.13039\/100010434","id-type":"DOI","asserted-by":"publisher"}]},{"name":"FCT\/MCTES","award":["UIDB\/EEA\/50008\/2020"],"award-info":[{"award-number":["UIDB\/EEA\/50008\/2020"]}]},{"name":"inisterio de Ciencia, Innovaci\u00f3n y Universidades, Programa Estatal de Generaci\u00f3n de Conocimiento y Fortalecimiento Cient\u00edfico y Tecnol\u00f3gico del Sistema I+D+i","award":["SPGC201800X098742CV0"],"award-info":[{"award-number":["SPGC201800X098742CV0"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>This study aimed to compare the collective dynamics of three different age-level groups (i.e., U13, U15 and U18) during a 4 vs. 4 plus goalkeepers small-sided game (SSG). Fifty-four male outfield soccer players aged between 13 and 18 years took part in the study. Team tactical behaviors were assessed by measuring (a) the area occupied by players of each team, (b) the distance between both teams\u2019 centroids, (c) the players\u2019 distance to their own team and d) the stretch index during a 4 vs. 4 plus goalkeepers SSG format. The main results revealed that larger areas were occupied by the older players (p &lt; 0.001; Effect size (ES) = 0.44\u20130.25, small). Additionally, the mean distance between teams\u2019 centroids was greater in older groups (p &lt; 0.001; ES = 0.44\u20130.81, large\u2013small). Finally, the distance between players (p &lt; 0.001; ES = 0.75\u20130.81, moderate\u2013large) and the stretch index (p &lt; 0.001; ES = 0.44\u20130.47, small) were also greater in older age categories. The evidence provided in the present study might help coaches identify the influence of age on collective dynamics during SSGs and help them find task conditions that could help to improve the behaviors and positioning of younger players.<\/jats:p>","DOI":"10.3390\/ijerph17051667","type":"journal-article","created":{"date-parts":[[2020,3,4]],"date-time":"2020-03-04T10:46:08Z","timestamp":1583318768000},"page":"1667","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Tactical Analysis According to Age-level Groups during a 4 vs. 4 Plus Goalkeepers Small-sided Game"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9813-2842","authenticated-orcid":false,"given":"Filipe M.","family":"Clemente","sequence":"first","affiliation":[{"name":"Escola Superior Desporto e Lazer, Instituto Polit\u00e9cnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun\u2019\u00c1lvares, 4900-347 Viana do Castelo, Portugal"},{"name":"Instituto de Telecomunica\u00e7\u00f5es, Delega\u00e7\u00e3o da Covilh\u00e3, 6200-001 Covilh\u00e3, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4159-6475","authenticated-orcid":false,"given":"Daniel","family":"Castillo","sequence":"additional","affiliation":[{"name":"Faculty of Health Sciences, Universidad Isabel I, 09003 Burgos, Spain"}]},{"given":"Asier","family":"Los Arcos","sequence":"additional","affiliation":[{"name":"Physical Education and Sport Department, Faculty of Education and Sport, University of Basque Country (UPV\/EHU), 01007 Vitoria-Gasteiz, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2020,3,4]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Araujo, D., and Davids, K. 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