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    Osteogenic effects of a physical activity intervention in South African black children

    Access Status
    Fulltext not available
    Authors
    Meiring, R.
    Micklesfield, L.
    Avidon, I.
    McVeigh, Joanne
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Meiring, R. and Micklesfield, L. and Avidon, I. and McVeigh, J. 2014. Osteogenic effects of a physical activity intervention in South African black children. Journal of Musculoskeletal Neuronal Interactions. 14 (3): pp. 276-285.
    Source Title
    Journal of Musculoskeletal Neuronal Interactions
    Additional URLs
    https://www.ncbi.nlm.nih.gov/pubmed/25198222
    ISSN
    1108-7161
    School
    School of Occupational Therapy and Social Work
    URI
    http://hdl.handle.net/20.500.11937/6088
    Collection
    • Curtin Research Publications
    Abstract

    Objectives: To determine whether a weight-bearing physical activity intervention improves measures of bone density, size and strength in a pre- and early pubertal cohort of black South African children. Methods: Twenty two school children (9.7±1.1 years) were cluster randomised into an exercise (EX; n=12) and control (CON; n=10) group. EX children performed a weight-bearing exercise program for 20 weeks. CON children continued their regular activities. Whole body DXA and tibial peripheral QCT scans were obtained. Urine was analysed for concentrations of cross-linked N-telopeptides of Type I collagen (NTX).Results: Changes in 4% volumetric BMD, area and strength were greater in EX than CON. At the 38% site, change in bone area and density was greater in EX than CON. The greater change in periosteal circumference in the EX groups also resulted in a greater change in cortical thickness of the tibia compared to the CON group. NTX concentration was lower in the EX group than the CON group after the intervention. Conclusions: This study documents for the first time the beneficial response of trabecular and cortical bone of black children to a weight bearing exercise intervention.

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