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Bone health, activity and sedentariness at age 11-12 years: Cross-sectional Australian population-derived study

Osborn, William; Simm, Peter J; Olds, Tim; Lycett, Kate; Mensah, Fiona; Muller, Josh; Fraysse, Francois; Ismail, Najmi; Vlok, Jennifer; Burgner, David; Edwards, Benjamin

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Aim: To examine cross-sectional associations of children's bone health (size, density, strength) with moderate vigorous physical activity (MVPA) and sedentary behaviour by considering: (1) duration of activity, (2) fragmentation, and (3) duration/fragmentation combined. Methods: Design: Population-based cross-sectional study. Participants: 11-12 year-olds in the Longitudinal Study of Australian Children's Child Health Checkpoint. Exposures: MVPA and sedentary behaviour (7-day...[Show more]

dc.contributor.authorOsborn, William
dc.contributor.authorSimm, Peter J
dc.contributor.authorOlds, Tim
dc.contributor.authorLycett, Kate
dc.contributor.authorMensah, Fiona
dc.contributor.authorMuller, Josh
dc.contributor.authorFraysse, Francois
dc.contributor.authorIsmail, Najmi
dc.contributor.authorVlok, Jennifer
dc.contributor.authorBurgner, David
dc.contributor.authorEdwards, Benjamin
dc.date.accessioned2019-07-26T06:36:06Z
dc.identifier.issn8756-3282
dc.identifier.urihttp://hdl.handle.net/1885/164745
dc.description.abstractAim: To examine cross-sectional associations of children's bone health (size, density, strength) with moderate vigorous physical activity (MVPA) and sedentary behaviour by considering: (1) duration of activity, (2) fragmentation, and (3) duration/fragmentation combined. Methods: Design: Population-based cross-sectional study. Participants: 11-12 year-olds in the Longitudinal Study of Australian Children's Child Health Checkpoint. Exposures: MVPA and sedentary behaviour (7-day accelerometry), yielding (1) daily average durations (min/day) and (2) fragmentations (the parameter alpha, representing the relationship between activity bout frequency and bout length). Outcomes: Tibial peripheral quantitative computed tomography (bone density, geometry, strength). Analysis: Multivariable regression models including activity durations and fragmentations separately and combined. Results: Of 1357 children attending the CheckPoint, 864 (64%) provided both bone and accelerometry data (mean age 11.4 years (standard deviation (SD) 0.5); 49% male). Mean daily MVPA and sedentary behaviour durations were 34.4 min/day (SD 28.3) and 667.9 min/day (SD 71.9) respectively for boys and girls combined. Each additional daily hour of MVPA was associated with small bone health benefits comprising greater periosteal and endosteal circumference (standardised effect sizes 0.25, 95% CI 0.10 to 0.40 and 0.21, 95% CI 0.03 to 0.39, respectively) and bone strength (0.26, 95% CI 0.14 to 0.38). Sedentary duration and fragmentation of either MVPA or sedentary behaviour showed little association with bone health. Conclusions: In early adolescence, MVPA duration showed associations with better bone health that, while modest, could be of population-level importance. MVPA fragmentation and sedentary behaviour duration and fragmentation seemed less important.
dc.description.sponsorshipThis work has been supported to date by the National Health and Medical Research Council (NHMRC) of Australia (Project Grants 1041352, 1109355), The Royal Children's Hospital Foundation (Grant 2014–241), Murdoch Children's Research Institute and The University of Melbourne. Research at the Murdoch Childrens Research Institute research is supported by the Victorian Government's Operational Infrastructure Program. The NHMRC supported MW (Senior Research Fellowship 1046518), KL (NHMRC Early Career Fellowship 1091124, National Heart Foundation Postdoctoral Fellowship 101239) and FM (Career Development Fellowship 1111160) in this work. MW was further supported by Cure Kids New Zealand.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherElsevier
dc.rights© 2018 Elsevier Inc
dc.sourceBone
dc.titleBone health, activity and sedentariness at age 11-12 years: Cross-sectional Australian population-derived study
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume112
dc.date.issued2018
local.identifier.absfor111403 - Paediatrics
local.identifier.ariespublicationu4485658xPUB1887
local.publisher.urlhttps://www.elsevier.com/en-au
local.type.statusPublished Version
local.contributor.affiliationOsborn, William, University of Melbourne
local.contributor.affiliationSimm, Peter J, University of Melbourne
local.contributor.affiliationOlds, Tim, University of South Australia
local.contributor.affiliationLycett, Kate, University of Melbourne
local.contributor.affiliationMensah, Fiona, Murdoch Childrens Research Centre
local.contributor.affiliationMuller, Josh, Murdoch Children Research Institute
local.contributor.affiliationFraysse, Francois, University of South Australia
local.contributor.affiliationIsmail, Najmi, Murdoch Children Research Institute
local.contributor.affiliationVlok, Jennifer, Murdoch Children Research Institute
local.contributor.affiliationBurgner, David, Murdoch Children Research Institute
local.contributor.affiliationEdwards, Benjamin, College of Arts and Social Sciences, ANU
local.description.embargo2037-12-31
dc.relationhttp://purl.org/au-research/grants/nhmrc/1041352
dc.relationhttp://purl.org/au-research/grants/nhmrc/1109355
dc.relationhttp://purl.org/au-research/grants/nhmrc/1046518
dc.relationhttp://purl.org/au-research/grants/nhmrc/1111160
local.bibliographicCitation.startpage153
local.bibliographicCitation.lastpage160
local.identifier.doi10.1016/j.bone.2018.04.011
dc.date.updated2019-03-31T07:22:54Z
local.identifier.scopusID2-s2.0-85046167389
local.identifier.thomsonID000434371100017
CollectionsANU Research Publications

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