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Adiposity, fitness, health-related quality of life and the reallocation of time between children's school day activity behaviours: a compositional data analysis

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dc.contributor.author Fairclough, Stuart J.
dc.contributor.author Dumuid, Dorothea
dc.contributor.author Mackintoshd, Kelly A.
dc.contributor.author Stonee, Genevieve
dc.contributor.author Dagger, Rebecca
dc.contributor.author Stratton, Gareth
dc.contributor.author Davies, Ian
dc.contributor.author Boddy, Lynne M.
dc.date.accessioned 2018-08-08T07:38:50Z
dc.date.available 2018-08-08T07:38:50Z
dc.date.issued 2018
dc.identifier.uri http://hdl.handle.net/10344/7035
dc.description peer-reviewed en_US
dc.description.abstract Sedentary time (ST), light (LPA), and moderate-to-vigorous physical activity (MVPA) constitute the range of school day activity behaviours. This study investigated whether the composition of school activity behaviours was associated with health indicators, and the predicted changes in health when time was reallocated between activity behaviours. Accelerometers were worn for 7-days between October and December 2010 by 318 UK children aged 10–11, to provide estimates of school day ST, LPA, and MVPA. BMI z-scores and percent waist-toheight ratio were calculated as indicators of adiposity. Cardiorespiratory fitness (CRF) was assessed using the 20- m shuttle run test. The PedsQL™ questionnaire was completed to assess psychosocial and physical health-related quality of life (HRQL). Log-ratio multiple linear regression models predicted health indicators for the mean school day activity composition, and for new compositions where fixed durations of time were reallocated from one activity behaviour to another, while the remaining behaviours were unchanged. The school day activity composition significantly predicted adiposity and CRF (p=0.04–0.002), but not HRQL. Replacing MVPA with ST or LPA around the mean activity composition predicted higher adiposity and lower CRF. When ST or LPA were substituted with MVPA, the relationships with adiposity and CRF were asymmetrical with favourable, but smaller predicted changes in adiposity and CRF than when MVPA was replaced. Predicted changes in HRQL were negligible. The school day activity composition significantly predicted adiposity and CRF but not HRQL. Reallocating time from ST and LPA to MVPA is advocated through comprehensive school physical activity promotion approaches. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Preventive Medicine Reports;11 pp 254–261
dc.subject time-use epidemiology en_US
dc.subject physical activity en_US
dc.subject sedentary behaviour en_US
dc.subject accelerometer en_US
dc.subject schools en_US
dc.subject children en_US
dc.subject health en_US
dc.subject coda en_US
dc.title Adiposity, fitness, health-related quality of life and the reallocation of time between children's school day activity behaviours: a compositional data analysis en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US


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