{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T07:54:46Z","timestamp":1777794886903,"version":"3.51.4"},"reference-count":40,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2022,3,1]],"date-time":"2022-03-01T00:00:00Z","timestamp":1646092800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001711","name":"Swiss National Science Foundation","doi-asserted-by":"publisher","award":["10001C_189407"],"award-info":[{"award-number":["10001C_189407"]}],"id":[{"id":"10.13039\/501100001711","id-type":"DOI","asserted-by":"publisher"}]},{"name":"the Swiss National Centre of Competence in Research LIVES, Overcoming Vulnerability: Life Course Perspectives, Swiss National Science Foundation","award":["51NF40-185901"],"award-info":[{"award-number":["51NF40-185901"]}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["UIDB\/50009\/2020"],"award-info":[{"award-number":["UIDB\/50009\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"name":"System of Incentives for the Production of Scientific and Technological Knowledge in the Autonomous Region of Madeira - PROCi\u00eancia 2020","award":["M1420-01-0247-FEDER-000033"],"award-info":[{"award-number":["M1420-01-0247-FEDER-000033"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>This study aimed to examine the associations between lower-body explosive strength (squat jump\u2014SJ, and countermovement jump\u2014CMJ), speed (10- and 35-m linear sprints), and agility (t-test) capacities, after controlling for crucial predictors such as chronological age (CA) and body composition. The sample was composed of 164 adolescent male football players from under 19, under 17, and under 15 age groups. Body fat percentage (BF%) was significantly and positively related to body mass, speed, and agility. In contrast, BF% was a significant negative predictor of lower-body explosive strength. Sprint and t-test times were significantly and negatively correlated with lower-body explosive strength. After controlling for CA and body composition, SJ was the most significant predictor, accounting for 36 to 37% of the variance observed in the 35 m linear sprint and the t-test performance. Our main results suggest that lower-body explosive strength, particularly in the SJ, is a significant predictor of male adolescent male football players\u2019 speed and agility capacities. Conversely, detrimental relationships between BF% and these outcomes were observed. Sports agents should consider lower-body explosive strength development as part of the youth football training process, particularly to improve maximal sprint and change of direction times, which are crucial to game performance.<\/jats:p>","DOI":"10.3390\/ijerph19052856","type":"journal-article","created":{"date-parts":[[2022,3,1]],"date-time":"2022-03-01T08:17:03Z","timestamp":1646122623000},"page":"2856","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":48,"title":["Speed and Agility Predictors among Adolescent Male Football Players"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8364-6832","authenticated-orcid":false,"given":"C\u00edntia","family":"Fran\u00e7a","sequence":"first","affiliation":[{"name":"Department of Physical Education and Sport, University of Madeira, 9020-105 Funchal, Portugal"},{"name":"LARSYS, Interactive Technologies Institute, 9020-105 Funchal, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0927-692X","authenticated-orcid":false,"given":"\u00c9lvio","family":"Gouveia","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sport, University of Madeira, 9020-105 Funchal, Portugal"},{"name":"LARSYS, Interactive Technologies Institute, 9020-105 Funchal, Portugal"},{"name":"Center for the Interdisciplinary Study of Gerontology and Vulnerability, University of Geneva, 1205 Geneva, Switzerland"}]},{"given":"Romualdo","family":"Caldeira","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sport, University of Madeira, 9020-105 Funchal, Portugal"},{"name":"LARSYS, Interactive Technologies Institute, 9020-105 Funchal, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9850-7771","authenticated-orcid":false,"given":"Adilson","family":"Marques","sequence":"additional","affiliation":[{"name":"CIPER, Faculty of Human Kinetics, University of Lisbon, 1499-002 Lisbon, Portugal"},{"name":"ISAMB, University of Lisbon, 1499-002 Lisbon, Portugal"}]},{"given":"Jo\u00e3o","family":"Martins","sequence":"additional","affiliation":[{"name":"CIPER, Faculty of Human Kinetics, University of Lisbon, 1499-002 Lisbon, Portugal"},{"name":"ISAMB, University of Lisbon, 1499-002 Lisbon, Portugal"},{"name":"Centro de Estudos de Educa\u00e7\u00e3o, Faculdade de Motricidade Humana e UIDEF, Instituto de Educa\u00e7\u00e3o, Universidade de Lisboa, 1649-004 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1388-9473","authenticated-orcid":false,"given":"Helder","family":"Lopes","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sport, University of Madeira, 9020-105 Funchal, Portugal"},{"name":"Centre for Tourism Research, Development and Innovation, University of Madeira, 9004-509 Funchal, Portugal"}]},{"given":"Ricardo","family":"Henriques","sequence":"additional","affiliation":[{"name":"Mar\u00edtimo da Madeira\u2014Futebol, SAD, 9020-208 Funchal, Portugal"}]},{"given":"Andreas","family":"Ihle","sequence":"additional","affiliation":[{"name":"Center for the Interdisciplinary Study of Gerontology and Vulnerability, University of Geneva, 1205 Geneva, Switzerland"},{"name":"Swiss National Centre of Competence in Research LIVES\u2014Overcoming Vulnerability: Life Course Perspectives, 1015 Lausanne, Switzerland"},{"name":"Department of Psychology, University of Geneva, 1205 Geneva, Switzerland"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"389","DOI":"10.1080\/02640414.2010.536849","article-title":"The long-term athlete development model: Physiological evidence and application","volume":"29","author":"Ford","year":"2011","journal-title":"J. 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