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dc.contributor.authorCorder, Kirstenen
dc.contributor.authorCraggs, Christopheren
dc.contributor.authorJones, Andyen
dc.contributor.authorEkelund, Ulfen
dc.contributor.authorGriffin, Simonen
dc.contributor.authorVan Sluijs, Estheren
dc.date.accessioned2013-06-04T19:13:00Z
dc.date.available2013-06-04T19:13:00Z
dc.date.issued2013-05-28en
dc.identifier.issn1479-5868
dc.identifier.urihttp://www.dspace.cam.ac.uk/handle/1810/244672
dc.description.abstractAbstract Background Predictors of physical activity (PA) change are rarely investigated separately for different PA intensities and for weekdays/weekends. We investigated whether individual-level predictors of one-year change in objectively-measured physical activity differ for moderate PA (MPA) and vigorous PA (VPA) and for weekends and weekdays. Methods Accelerometer-assessed PA (mins) was obtained at baseline and +1 year (n = 875, 41.5% male, Mean ± SD baseline age: 9.8 ± 0.4 years-old). Potential predictors (n = 38) were assessed at baseline from psychological (e.g. self-efficacy), socio-cultural (e.g. parent support) and environmental domains (e.g. land use). Associations between predictors and change in MPA (2000–3999 counts/minute (cpm)) and VPA (≥4000 cpm) separately for weekdays and weekends were studied using multi-level linear regression. Analyses were adjusted for school clustering, sex and baseline PA. Results Weekend PA declined (MPA decline 4.6 ± 21.8 mins/day; VPA decline: 2.1 ± 20.1 mins/day; both p < 0.001) whereas weekday PA did not significantly change. Higher baseline PA and being a girl were associated with greater PA declines in all four outcomes; remaining predictors differed for MPA and VPA and/or weekdays and weekends. Family logistic support was associated with less of a decline in weekend MPA (CI 95%) 0.15 (0.05, 0.25) and VPA 0.19 (0.09, 0.29), and peer support with less of a decline in weekday MPA 0.18 (0.02, 0.34) and VPA 0.22 (0.06, 0.38). Conclusions Results highlight the relevance of investigating predictors of PA change separately for different PA intensities and for weekdays/weekends. In addition to continued focus on school PA promotion, more effort to target interventions during weekends, such as in the family and community appears important. Encouraging peer support to increase weekday PA and targeting parent support for weekend PA may be health promotion priorities.
dc.languageEnglishen
dc.language.isoen
dc.titlePredictors of change differ for moderate and vigorous intensity physical activity and for weekdays and weekends: a longitudinal analysisen
dc.typeArticle
dc.date.updated2013-06-04T19:13:00Z
dc.description.versionRIGHTS : This article is licensed under the BioMed Central licence at http://www.biomedcentral.com/about/license which is similar to the 'Creative Commons Attribution Licence'. In brief you may : copy, distribute, and display the work; make derivative works; or make commercial use of the work - under the following conditions: the original author must be given credit; for any reuse or distribution, it must be made clear to others what the license terms of this work are.en
dc.rights.holderKirsten Corder et al.; licensee BioMed Central Ltd.
prism.publicationDate2013en
dcterms.dateAccepted2013-05-17en
rioxxterms.versionofrecord10.1186/1479-5868-10-69en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2013-05-28en
dc.contributor.orcidCorder, Kirsten [0000-0002-2744-3501]
dc.contributor.orcidGriffin, Simon [0000-0002-2157-4797]
dc.contributor.orcidVan Sluijs, Esther [0000-0001-9141-9082]
dc.identifier.eissn1479-5868
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idESRC (ES/G007462/1)
pubs.funder-project-idMedical Research Council (G0501294)
pubs.funder-project-idMRC (MC_UU_12015/7)
pubs.funder-project-idMRC (MC_UU_12015/4)
pubs.funder-project-idWellcome Trust (087636/Z/08/Z)
pubs.funder-project-idMedical Research Council (MC_U106179474)


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