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dc.contributor.authorHrafnkelsson, Hannes
dc.contributor.authorSigurdsson, Gunnar
dc.contributor.authorMagnusson, Kristjan Th
dc.contributor.authorSigurdsson, Emil L
dc.contributor.authorJohannsson, Erlingur
dc.date.accessioned2014-02-25T12:07:41Z
dc.date.available2014-02-25T12:07:41Z
dc.date.issued2013-07
dc.date.submitted2013
dc.identifier.citationJ. Bone Miner. Metab. 2013, 31 (4):442-8en
dc.identifier.issn1435-5604
dc.identifier.pmid23397377
dc.identifier.doi10.1007/s00774-013-0423-3
dc.identifier.urihttp://hdl.handle.net/2336/313347
dc.descriptionTo access publisher's full text version of this article. Please click on the hyperlink in Additional Links field.en
dc.description.abstractThe main aims of this study were, to evaluate what effect a change in fat mass (FM) and lean body mass (LBM) has on bone parameters over 2 years' time, in 7-year-old school children and to see what effect fitness had on bone parameters in these children. A repeated-measures design study was conducted where children born in 1999 from six elementary schools in Reykjavik, Iceland were measured twice. All children attending second grade in these six schools were invited to participate. Three hundred twenty-one children were invited, 211 underwent dual-energy X-ray absorptiometry (DXA) scans at the age of seven, and 164 (78 %) of the 211 had DXA scans again 2 years later. Increase in both FM and LBM was associated with increased total body bone mineral content (BMC) and bone area (BA). An increase in FM was more strongly positively associated with BA while an increase in LBM was more strongly associated with an increase in BMC. An increase in FM was negatively associated with change in bone mineral density (BMD), but an increase in LBM was positively associated with change in BMD. Fitness was positively associated with bone parameters when weight, height and sex were accounted for. The present results suggest that an increase in fat mass over 2 years is associated with an increase in BA and BMC, but a decrease in BMD in the whole body. An increase in LBM accrual, on the other hand, is positively associated with all bone parameters in the body. Fitness is associated with both BMC and BMD but not BA.
dc.description.sponsorshipIcelandic Centre for Research (RANNIS) city of Reykjavik Ministry of Education, Science and Culture Icelandic Primary Health Care Research Fund BRIM Seafooden
dc.language.isoenen
dc.publisherSpringer Japanen
dc.relation.urlhttp://dx.doi.org/10.1007/s00774-013-0423-3en
dc.rightsArchived with thanks to Journal of bone and mineral metabolismen
dc.subjectBeinþéttnien
dc.subjectBörnen
dc.subjectLíkamsástanden
dc.subjectOffitaen
dc.subject.meshAdiposityen
dc.subject.meshBone Densityen
dc.subject.meshBone and Bonesen
dc.subject.meshChilden
dc.subject.meshFemaleen
dc.subject.meshFollow-Up Studiesen
dc.subject.meshHipen
dc.subject.meshHumansen
dc.subject.meshLinear Modelsen
dc.subject.meshMaleen
dc.subject.meshPhysical Fitnessen
dc.titleFat mass increase in 7-year-old children: more bone area but lower bone mineral density.en
dc.typeArticleen
dc.contributor.departmentUniv Iceland, Reykjavik, Iceland, Seltjarnarnes Hlth Care Ctr, Reykjavik, Iceland, Univ Hosp, Reykjavik, Iceland, Univ Iceland, Sch Educ, Ctr Sport & Hlth Sci, Reykjavik, Iceland, Solvangur Hlth Care Ctr, Hafnarfjordur, Iceland, Univ Iceland, Dept Family Med, Reykjavik, Icelanden
dc.identifier.journalJournal of bone and mineral metabolismen
dc.rights.accessNational Consortium - Landsaðganguren
html.description.abstractThe main aims of this study were, to evaluate what effect a change in fat mass (FM) and lean body mass (LBM) has on bone parameters over 2 years' time, in 7-year-old school children and to see what effect fitness had on bone parameters in these children. A repeated-measures design study was conducted where children born in 1999 from six elementary schools in Reykjavik, Iceland were measured twice. All children attending second grade in these six schools were invited to participate. Three hundred twenty-one children were invited, 211 underwent dual-energy X-ray absorptiometry (DXA) scans at the age of seven, and 164 (78 %) of the 211 had DXA scans again 2 years later. Increase in both FM and LBM was associated with increased total body bone mineral content (BMC) and bone area (BA). An increase in FM was more strongly positively associated with BA while an increase in LBM was more strongly associated with an increase in BMC. An increase in FM was negatively associated with change in bone mineral density (BMD), but an increase in LBM was positively associated with change in BMD. Fitness was positively associated with bone parameters when weight, height and sex were accounted for. The present results suggest that an increase in fat mass over 2 years is associated with an increase in BA and BMC, but a decrease in BMD in the whole body. An increase in LBM accrual, on the other hand, is positively associated with all bone parameters in the body. Fitness is associated with both BMC and BMD but not BA.


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