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dc.contributor.authorGrendstad, Halvard Nikolai
dc.contributor.authorNilsen, Ann-Kristin
dc.contributor.authorRygh, Cecilie Brekke
dc.contributor.authorHafstad, Arild
dc.contributor.authorKristoffersen, Morten
dc.contributor.authorIversen, Vegard Vereide
dc.contributor.authorNybakken, Tone
dc.contributor.authorVestbøstad, Mona
dc.contributor.authorAlgrøy, Erling Andre
dc.contributor.authorSandbakk, Øyvind
dc.contributor.authorGundersen, Hilde
dc.identifier.citationGrendstad, H., Nilsen, A. K., Rygh, C. B., Hafstad, A., Kristoffersen, M., Iversen, V. V., . . . Gundersen, H. (2019). Physical capacity, not skeletal maturity, distinguishes competitive levels in male Norwegian U14 soccer players. Scandinavian Journal of Medicine & Science in Sports, 30(2), 254-263.en_US
dc.description.abstractThe main aim of the present study was to compare skeletal maturity level and physi-cal capacities between male Norwegian soccer players playing at elite, sub-elite and non-elite level. Secondary, we aimed to investigate the association between skeletal maturity level and physical capacities. One hundred and two U14 soccer players (12.8-14.5 years old) recruited from four local clubs, and a regional team were tested for bone age and physical capacities. Bone age was estimated with x-ray of their left hand and used to indicate maturation of the skeleton. Players went through a com-prehensive test battery to assess their physical capacities. Between-groups analysis revealed no difference in chronological age, skeletal maturity level, leg strength, body weight, or stature. However, elite players were superior to sub-elite and non-elite players on important functional characteristics as intermittent-endurance ca-pacity (running distance: 1664 m ± 367 vs 1197 m ± 338 vs 693 m ± 235) and running speed (fastest 10 m split time: 1.27 seconds ± 0.06 vs 1.33 seconds ± 0.10 vs 1.39 seconds ± 0.11), in addition to maximal oxygen uptake (̇VO2max), standing long jump, and upper body strength (P < .05 for all comparisons). Medium-to-large correlations were found between skeletal maturity level and peak force (r = 695, P < .01), power (r = 684, P < .01), sprint (r = −.471, P<.001), and jump perfor-mance (r = .359, P < .01), but no correlation with upper body strength, ̇VO2max, or intermittent-endurance capacity. These findings imply that skeletal maturity level does not bias the selection of players, although well-developed physical capacity clearly distinguishes competitive levels. The superior physical performance of the highest-ranked players seems related to an appropriate training environment.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectcompetitive levelsen_US
dc.subjectphysical capacityen_US
dc.subjectskeletal maturationen_US
dc.subjecttalent selectionen_US
dc.subjectyouth socceren_US
dc.titlePhysical capacity, not skeletal maturity, distinguishes competitive levels in male Norwegian U14 playersen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2019 The Authorsen_US
dc.subject.nsiVDP::Medisinske Fag: 700::Idrettsmedisinske fag: 850::Treningslære: 851en_US
dc.source.journalScandinavian Journal of Medicine & Science in Sportsen_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal