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dc.contributor.authorSagelv, Edvard Hamnvik
dc.contributor.authorSelnæs, Ivar
dc.contributor.authorPedersen, Sigurd
dc.contributor.authorPettersen, Svein Arne
dc.contributor.authorRanders, Morten B.
dc.contributor.authorWelde, Boye
dc.date.accessioned2019-08-19T12:20:07Z
dc.date.available2019-08-19T12:20:07Z
dc.date.issued2019-08-06
dc.description.abstract<i>Abstract</i>: Background: Changes of direction (COD) repeated sprints (RSs) might have greater relevance to football than linear RSs. We aimed to compare the effects of linear and COD RSs on intermittent high intensity running (HIR) over an entire season. <p> <p><i>Methods</i>: In total, 19 high-level male football players (16–19 years) randomly performed linear RSs or COD RSs twice a week during their competitive season over 22 weeks. Yo-Yo intermittent recovery test level 2 (Yo-Yo IR2), and 10- and 20-m sprint was assessed pre-, mid- (11 weeks), and post-intervention (22 weeks). Maximal oxygen uptake (VO<sub>2max</sub>) was assessed pre- and post-intervention. <p> <p><i>Results</i>: There was no interaction effect (time x group) in Yo-Yo IR2 (<i>p</i> = 0.36, <sub>p</sub>η <sup>2</sup> = 0.06) or sprint tests (10 m: <i>p</i> = 0.55, <sub>p</sub>η <sup>2</sup> = 0.04, 20 m: <i>p</i> = 0.28 <sub>p</sub>η <sup>2</sup> = 0.08), and no change differences between groups. There was a main effect of time for Yo-Yo IR2 (<i>p</i> = 0.002, <sub>p</sub>η <sup>2</sup> = 0.31) but not in sprints or VO<sub>2max</sub>. <p> <p><i>Conclusion</i>: Linear and COD RS exercise twice a week over 22 weeks equally improves intermittent HIR performance but does not improve sprint time or aerobic power in high-level junior football players. However, due to our two-armed intervention, we cannot exclude possible effects from other exercise components in the players’ exercise program.en_US
dc.description.sponsorshipUiT the Arctic University of Norway, University library, the publication funden_US
dc.descriptionSource at <a href=https://doi.org/10.3390/sports7080189>https://doi.org/10.3390/sports7080189. </a>en_US
dc.identifier.citationSagelv, E.H., Selnæs, I., Pedersen, S., Pettersen, S.A., Randers, M.B. & Welde, B. (2019). Effects of Linear Versus Changes of Direction Repeated Sprints on Intermittent High Intensity Running Performance in High-level Junior Football Players over an Entire Season: A Randomized Trial. <i>Sports, 7</i>(8), 189. https://doi.org/10.3390/sports7080189en_US
dc.identifier.cristinIDFRIDAID 1715999
dc.identifier.doihttps://doi.org/10.3390/sports7080189
dc.identifier.issn2075-4663
dc.identifier.urihttps://hdl.handle.net/10037/15935
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.relation.journalSports
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Medical disciplines: 700::Sports medicine: 850::Exercise techniques: 851en_US
dc.subjectVDP::Medisinske Fag: 700::Idrettsmedisinske fag: 850::Treningslære: 851en_US
dc.subjectsocceren_US
dc.subjectrepeated sprinten_US
dc.subjecthigh intensity runningen_US
dc.titleEffects of Linear Versus Changes of Direction Repeated Sprints on Intermittent High Intensity Running Performance in High-level Junior Football Players over an Entire Season: A Randomized Trialen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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