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dc.contributor.authorWeeks, Benjaminen_US
dc.contributor.authorYoung, Cathen_US
dc.contributor.authorBeck, Belindaen_US
dc.contributor.editorEisman JAen_US
dc.date.accessioned2017-05-03T12:00:37Z
dc.date.available2017-05-03T12:00:37Z
dc.date.issued2008en_US
dc.date.modified2009-02-11T08:40:25Z
dc.identifier.issn08840431en_US
dc.identifier.doi10.1359/jbmr.080226en_AU
dc.identifier.urihttp://hdl.handle.net/10072/20443
dc.description.abstractIntroduction: It has been hypothesized that high intensity skeletal loading during growth is an effective strategy to maximize bone accrual and reduce fracture risk in old age. The POWER PE study was an eight-month, randomized, controlled, school-based exercise intervention designed to apply known principles of effective bone loading to practical opportunities to improve life long musculoskeletal outcomes. Materials and Methods: A total of 99 adolescents (46 boys, 53 girls) with a mean age of 13.8 ? 0.4 years (peri-post pubertal) volunteered to participate. Intervention subjects performed ten minutes of jumping activity in place of regular physical education (PE) warm up. Control subjects performed usual PE warm-up activities. Bone mass (DXA and QUS) was assessed at baseline and follow-up along with anthropometry, maturity, muscle power, and estimates of physical activity and dietary calcium. Geometric properties (such as FN moment of inertia) were calculated from DXA measures. Results: Boys in the intervention group experienced improvements in calcaneal BUA (+5.0%), and fat mass (-10.5%), while controls did not (+1.4%, and -0.8% respectively). Girls in the intervention group improved FN BMC (+13.9%) and LS BMAD (+5.2%), more than controls (+4.9% and +1.5% respectively). Between group comparisons of change revealed intervention effects only for WB BMC (+10.6% vs +6.3%) for boys. Boys in the intervention group gained more lean tissue mass, TR BMC, LS BMC, and WB BMC and lost more fat mass than girls in the intervention group (p < 0.05). Conclusions: Ten minutes of jumping activity twice a week for eight months during adolescence appears to improve bone accrual in a sex-specific manner. Boys increased whole body bone mass and BUA, and reduced fat mass, while girls improved bone mass at the hip and spine.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent322571 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherAmerican Society for Bone and Mineral Researchen_US
dc.publisher.placeUnited Statesen_US
dc.publisher.urihttp://www.jbmronline.org/en_AU
dc.relation.ispartofstudentpublicationYen_AU
dc.relation.ispartofpagefrom1002en_US
dc.relation.ispartofpageto1011en_US
dc.relation.ispartofeditionJulyen_US
dc.relation.ispartofissue7en_US
dc.relation.ispartofjournalJournal of Bone and Mineral Researchen_US
dc.relation.ispartofvolume23en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchcode321017en_US
dc.titleEight months of regular in-school jumping improves indices of bone strength in adolescent boys and girls: the POWER PE studyen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.facultyGriffith Health, School of Allied Health Sciencesen_US
gro.rights.copyrightCopyright 2008 American Society for Bone and Mineral Research. Please refer to the journal link for access to the definitive, published version. This is the author-manuscript version of the paper. Reproduced in accordance with the copyright policy of the publisher.en_AU
gro.date.issued2008
gro.hasfulltextFull Text


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