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dc.contributor.authorCollings, Paul J.
dc.contributor.authorWestgate, Kate
dc.contributor.authorVäistö, Juuso
dc.contributor.authorWijndaele, Katrien
dc.contributor.authorAtkin, Andrew J.
dc.contributor.authorHaapala, Eero A.
dc.contributor.authorLintu, Niina
dc.contributor.authorLaitinen, Tomi
dc.contributor.authorEkelund, Ulf
dc.contributor.authorBrage, Søren
dc.contributor.authorLakka, Timo A.
dc.date.accessioned2017-03-01T08:39:47Z
dc.date.available2017-03-01T08:39:47Z
dc.date.issued2016-08-24
dc.identifier.citationSports Medicine. 2016, under utgivelse. doi:10.1007/s40279-016-0606-xnb_NO
dc.identifier.urihttp://hdl.handle.net/11250/2432467
dc.description.abstractBackground: The minimum intensity of physical activity (PA) that is associated with favourable body composition and cardiorespiratory fitness (CRF) remains unknown. Objective: To investigate cross-sectional associations of PA and sedentary time (ST) with body composition and CRF in mid-childhood. Methods: PA, ST, body composition and CRF were measured in a population-based sample of 410 children (aged 7.6 ± 0.4 years). Combined heart-rate and movement sensing provided estimates of PA energy expenditure (PAEE, kJ/kg/day) and time (min/day) at multiple fine-grained metabolic equivalent (MET) levels, which were also collapsed to ST and light PA (LPA), moderate PA (MPA) and vigorous PA (VPA). Fat mass index (FMI, kg/m2), trunk fat mass index (TFMI, kg/m2) and fat-free mass index (FFMI, kg/m2.5) were derived from dual-energy X-ray absorptiometry. Maximal workload from a cycle ergometer test provided a measure of CRF (W/kg FFM). Linear regression and isotemporal substitution models were used to investigate associations. Results: The cumulative time above 2 METs (221 J/min/kg) was inversely associated with FMI and TFMI in both sexes (p < 0.001) whereas time spent above 3 METs was positively associated with CRF (p ≤ 0.002); CRF increased and adiposity decreased dose-dependently with increasing MET levels. ST was positively associated with FMI and TFMI (p < 0.001) but there were inverse associations between all PA categories (including LPA) and adiposity (p ≤ 0.002); the magnitude of these associations depended on the activity being displaced in isotemporal substitution models but were consistently stronger for VPA. PAEE, MPA and to a greater extent VPA, were all positively related to CRF (p ≤ 0.001). Conclusions: PA exceeding 2 METs is associated with lower adiposity in mid-childhood, whereas PA of 3 METs is required to benefit CRF. VPA was most beneficial for fitness and fatness, from a time-for-time perspective, but displacing any lower-for-higher intensity may be an important first-order public health strategy.nb_NO
dc.language.isoengnb_NO
dc.publisherSpringernb_NO
dc.subjectphysical activity
dc.subjectbody composition
dc.subjectsleep duration
dc.subjectsedentary time
dc.subjectcardiorespiratory fitness
dc.titleCross-Sectional Associations of Objectively-Measured Physical Activity and Sedentary Time with Body Composition and Cardiorespiratory Fitness in Mid-Childhood: The PANIC Studynb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.subject.nsiVDP::Samfunnsvitenskap: 200::Samfunnsvitenskapelige idrettsfag: 330::Andre idrettsfag: 339nb_NO
dc.source.journalSports Medicinenb_NO
dc.identifier.doi10.1007/s40279-016-0606-x
dc.description.localcodeSeksjon for idrettsmedisinske fag / Department of Sports Medicinenb_NO


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