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One hundred and sixty-seven young male national level soccer players were tested on anthropometric characteristics and physical performance tests (30\u2009m sprint, ball kicking, overhead medicine ball throw, and countermovement jump). The results demonstrated differences in anthropometric characteristics between positions ( p\u2009&lt;\u20090.05). Differences were also found in the physical performance tests; forwards performed better in the throwing, countermovement jump, and sprint tests than defenders. Midfielders demonstrated greater countermovement jump performances than right defenders. Our results highlight that there is an influence of playing position on the anthropometric and physical qualities in adolescent players. This emphasizes the importance of evaluating the physical profile of players and their development according to playing age and playing position.<\/jats:p>","DOI":"10.1177\/1747954116667107","type":"journal-article","created":{"date-parts":[[2016,9,8]],"date-time":"2016-09-08T21:13:35Z","timestamp":1473369215000},"page":"693-701","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":14,"title":["Physical fitness profile of competitive young soccer players: Determination of positional differences"],"prefix":"10.1177","volume":"11","author":[{"given":"M\u00e1rio C","family":"Marques","sequence":"first","affiliation":[{"name":"Department of Sport Sciences, University of Beira Interior, Covilh\u00e3, Portugal"},{"name":"Research Centre in Sports, Health and Human Development, CIDESD, Portugal"}]},{"given":"Mikel","family":"Izquierdo","sequence":"additional","affiliation":[{"name":"Department of Health Sciences, Public 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