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Sex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children

2012Journal article Open access
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dc.contributor.authorCardadeiro, Graça
dc.contributor.authorBaptista, Fátima
dc.contributor.authorOrnelas, Rui
dc.contributor.authorJanz, Kathleen F.
dc.contributor.authorSardinha, Luís B.
dc.date.accessioned2021-11-24T10:21:58Z
dc.date.available2021-11-24T10:21:58Z
dc.date.issued2012
dc.description.abstractThe results of physical activity (PA) intervention studies suggest that adaptation to mechanical loading at the femoral neck (FN) is weaker in girls than in boys. Less is known about gender differences associated with non-targeted PA levels at the FN or other clinically relevant regions of the proximal femur. Understanding sex-specific relationships between proximal femur sensitivity and mechanical loading during non-targeted PA is critical to planning appropriate public health interventions. We examined sex-specific associations between non-target PA and bone mineral density (BMD) of three sub-regions of the proximal femur in pre- and early-pubertal boys and girls. BMD at the FN, trochanter (TR) and intertrochanter (IT) regions, and lean mass of the whole body were assessed using dual-energy x-ray absorptiometry in 161 girls (age: 9.760.3 yrs) and 164 boys (age: 9.760.3 yrs). PA was measured using accelerometry. Multiple linear regression analyses (adjusted for body height, total lean mass and pubertal status) revealed that vigorous PA explained 3–5% of the variability in BMD at all three sub regions in boys. In girls, vigorous PA explained 4% of the variability in IT BMD and 6% in TR BMD. PA did not contribute to the variance in FN BMD in girls. An additional 10 minutes per day of vigorous PA would be expected to result in a ,1% higher FN, TR, and IT BMD in boys (p,0.05) and a ,2% higher IT and TR BMD in girls. In conclusion, vigorous PA can be expected to contribute positively to bone health outcomes for boys and girls. However, the association of vigorous PA to sub-regions of the proximal femur varies by sex, such that girls associations are heterogeneous and the lowest at the FN, but stronger at the TR and the IT, when compared to boys.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCardadeiro, G., Baptista, F., Ornelas, R., Janz, K. F., & Sardinha, L. B. (2012). Sex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children. PLoS One, 7(11), e50657. doi:10.1371/journal.pone.0050657pt_PT
dc.identifier.doi10.1371/journal.pone.0050657pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3847
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherPublic Library of Sciencept_PT
dc.relationINFLUÊNCIA DA CARGA MECÂNICA NA MORFOLOGIA DO ESQUELETO
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectPhysical activitypt_PT
dc.subjectFemur BMDpt_PT
dc.subjectChildrenpt_PT
dc.subjectGirlspt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Sociaispt_PT
dc.titleSex specific association of physical activity on proximal femur BMD in 9 to 10 year-old childrenpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleINFLUÊNCIA DA CARGA MECÂNICA NA MORFOLOGIA DO ESQUELETO
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F38671%2F2007/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FDES%2F115607%2F2009/PT
oaire.citation.issue11pt_PT
oaire.citation.startPagee50657pt_PT
oaire.citation.titlePLoS ONEpt_PT
oaire.citation.volume7pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameOrnelas
person.familyNameSardinha
person.givenNameRui
person.givenNameLuis
person.identifier.ciencia-idA71A-D19E-55F4
person.identifier.ciencia-idA812-2D8E-1BC9
person.identifier.orcid0000-0003-3737-7402
person.identifier.orcid0000-0002-6230-6027
person.identifier.scopus-author-id24335790700
person.identifier.scopus-author-id6603814844
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication05370ce4-254d-4ca7-a937-9036407655c2
relation.isAuthorOfPublicationbd52240f-9a52-464f-82c4-b5d1d35bb133
relation.isAuthorOfPublication.latestForDiscovery05370ce4-254d-4ca7-a937-9036407655c2
relation.isProjectOfPublication7823c66d-1688-49d3-becb-55938dbb0eef
relation.isProjectOfPublication12439000-939f-41fc-8999-1eaa5e071529
relation.isProjectOfPublication.latestForDiscovery7823c66d-1688-49d3-becb-55938dbb0eef

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