| Effects of repetitive loading on the growth-induced changes in bone mass and cortical bone geometry: a 12-month study in pre/peri- and post-menarcheal tennis players. | |
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MedLine Citation:
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PMID: 21190310 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Pre- and early-puberty may be the most opportune time to strengthen the female skeleton, but there is little longitudinal data to support this claim. Competitive female pre-menarcheal ('PRE/PERI', n=13) and post-menarcheal ([POST], n=32) tennis players aged 10-17 years were followed over 12 months. The osteogenic response to loading was studied by comparing the playing and nonplaying humeri for DXA BMC and MRI total bone area (ToA), medullary area (MedA), cortical area (CoA) and muscle area (MCSA) at the humerus. Growth effects: Over 12 months, growth-induced gains (nonplaying arm) in BMC, ToA and CoA were greater in PRE/PERI (10-19%, p<0.001) than in POST (3-5%, p<0.05-0.001). Exercise effects: At baseline, BMC, ToA, CoA and MCSA were 8-18% greater in the playing vs. nonplaying arm in PRE/PERI and POST (all p<0.001); MedA was smaller in the playing vs. nonplaying arm in POST only (p<0.05). When comparing the annual gains in the playing arm relative to the changes in the nonplaying arm, the increases in ToA and CoA were greater in PRE/PERI than POST (all p<0.05). The smaller the side-to-side differences in BMC and CoA at baseline, the larger the exercise benefits at 12 months (r=-0.39 to -0.48, p<0.01). The exercise-induced change in MCSA was predictive of the exercise benefits in BMC in PRE/PERI players only (p<0.05). In conclusion, both pre/peri- and post-menarcheal tennis players showed significant exercise-induced skeletal benefits within a year, with greater benefits in cortical bone geometry in pre/peri-menarcheal girls. © 2010 American Society for Bone and Mineral Research. |
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Authors:
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Gaele Ducher; Shona L Bass; Leanne Saxon; Robin M Daly |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2010-12-28 |
Journal Detail:
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Title: Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research Volume: - ISSN: 1523-4681 ISO Abbreviation: - Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-12-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8610640 Medline TA: J Bone Miner Res Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Noll Laboratory, Penn State University, University Park, PA, United States. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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