{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T16:16:54Z","timestamp":1789143414172,"version":"build-2803163510"},"reference-count":39,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2019,11,27]],"date-time":"2019-11-27T00:00:00Z","timestamp":1574812800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Scandinavian Med Sci Sports"],"published-print":{"date-parts":[[2020,2]]},"abstract":"<jats:p>The main aim of the present study was to compare skeletal maturity level and physical capacities between male Norwegian soccer players playing at elite, sub\u2010elite and non\u2010elite level. Secondary, we aimed to investigate the association between skeletal maturity level and physical capacities. One hundred and two U14 soccer players (12.8\u201014.5\u00a0years old) recruited from four local clubs, and a regional team were tested for bone age and physical capacities. Bone age was estimated with x\u2010ray of their left hand and used to indicate maturation of the skeleton. Players went through a comprehensive test battery to assess their physical capacities. Between\u2010groups analysis revealed no difference in chronological age, skeletal maturity level, leg strength, body weight, or stature. However, elite players were superior to sub\u2010elite and non\u2010elite players on important functional characteristics as intermittent\u2010endurance capacity (running distance: 1664\u00a0m\u00a0\u00b1\u00a0367 vs 1197\u00a0m\u00a0\u00b1\u00a0338 vs 693\u00a0m\u00a0\u00b1\u00a0235) and running speed (fastest 10\u00a0m split time: 1.27\u00a0seconds\u00a0\u00b1\u00a00.06 vs 1.33\u00a0seconds\u00a0\u00b1\u00a00.10 vs 1.39\u00a0seconds\u00a0\u00b1\u00a00.11), in addition to maximal oxygen uptake (<jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/sms13572-math-0001.png\" xlink:title=\"urn:x-wiley:09057188:media:sms13572:sms13572-math-0001\"\/>), standing long jump, and upper body strength (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.05 for all comparisons). Medium\u2010to\u2010large correlations were found between skeletal maturity level and peak force (<jats:italic>r<\/jats:italic>\u00a0=\u00a0695, <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.01), power (<jats:italic>r<\/jats:italic>\u00a0=\u00a0684, <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.01), sprint (<jats:italic>r\u00a0<\/jats:italic>=\u00a0\u2212.471, <jats:italic>P<\/jats:italic>&lt;.001), and jump performance (<jats:italic>r\u00a0<\/jats:italic>=\u00a0.359, <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.01), but no correlation with upper body strength, <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/sms13572-math-0002.png\" xlink:title=\"urn:x-wiley:09057188:media:sms13572:sms13572-math-0002\"\/>, or intermittent\u2010endurance capacity. These findings imply that skeletal maturity level does not bias the selection of players, although well\u2010developed physical capacity clearly distinguishes competitive levels. The superior physical performance of the highest\u2010ranked players seems related to an appropriate training environment.<\/jats:p>","DOI":"10.1111\/sms.13572","type":"journal-article","created":{"date-parts":[[2019,10,12]],"date-time":"2019-10-12T18:18:22Z","timestamp":1570904302000},"page":"254-263","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["Physical capacity, not skeletal maturity, distinguishes competitive levels in male Norwegian U14 soccer\u00a0players"],"prefix":"10.1111","volume":"30","author":[{"given":"Halvard","family":"Grendstad","sequence":"first","affiliation":[{"name":"Department of Sport, Food, and Natural Sciences Western Norway University of Applied Sciences Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ann\u2010Kristin","family":"Nilsen","sequence":"additional","affiliation":[{"name":"Department of Sport, Food, and Natural Sciences Western Norway University of Applied Sciences Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cecilie Brekke","family":"Rygh","sequence":"additional","affiliation":[{"name":"Department of Health and Functioning Western University of Applied Sciences Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arild","family":"Hafstad","sequence":"additional","affiliation":[{"name":"Department of Sport, Food, and Natural Sciences Western Norway University of Applied Sciences Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Morten","family":"Kristoffersen","sequence":"additional","affiliation":[{"name":"Department of Sport, Food, and Natural Sciences Western Norway University of Applied Sciences Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vegard Vereide","family":"Iversen","sequence":"additional","affiliation":[{"name":"Department of Sport, Food, and Natural Sciences Western Norway University of 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