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    High bone turnover in Irish professional jockeys.

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    Authors
    Waldron-Lynch, F
    Murray, B F
    Brady, J J
    McKenna, M J
    McGoldrick, A
    Warrington, G
    O'Loughlin, G
    Barragry, J M
    Affiliation
    Adelaide and Meath Hospital, Dublin, Ireland. frank.waldron-lynch@yale.edu
    Issue Date
    2012-02-01T10:49:57Z
    MeSH
    Adult
    Body Mass Index
    Bone Density/physiology
    Bone Diseases, Metabolic/*etiology/physiopathology
    Bone and Bones/*metabolism
    Case-Control Studies
    Diet/adverse effects
    Food Habits
    Humans
    Male
    Occupational Diseases/*etiology/physiopathology
    Sports/*physiology
    Young Adult
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    Citation
    Osteoporos Int. 2010 Mar;21(3):521-5. Epub 2009 Mar 7.
    Journal
    Osteoporosis international : a journal established as result of cooperation, between the European Foundation for Osteoporosis and the National Osteoporosis, Foundation of the USA
    URI
    http://hdl.handle.net/10147/207914
    DOI
    10.1007/s00198-009-0887-0
    PubMed ID
    19271097
    Abstract
    SUMMARY: Professional jockeys are routinely exposed to high impact trauma and sustain fractures frequently. We found that jockeys restrict their caloric intake in order to maintain regulation weights, and that bone turnover is high. There are significant health and safety implications for the racing industry. INTRODUCTION: Professional jockeys routinely sustain fractures from high impact falls. Jockeys maintain a low percentage body fat and a low body mass index (BMI) to achieve low weight targets in order to race. We evaluated dietary habits and bone metabolism in jockeys. METHODS: Bone mineral density (BMD) was measured in 27 male jockeys of the 144 jockeys licensed in Ireland. Fourteen (52%) had BMD T score below -1.0, of whom 12 consented to clinical review, nutritional survey, endocrine studies, and bone turnover markers (BTM). BTM were compared to age- and sex-matched controls (n = 16). RESULTS: BMI was 20.6 +/- 1.7 kg/m(2); previous fracture frequency was 3.2 +/- 2.0 per rider. All had normal endocrine axes. The jockeys' diet as determined by a 7-day dietary recall was deficient in energy, calcium, and vitamin D intake. Compared with the control group, the jockey group had evidence of increased bone turnover. CONCLUSIONS: A substantial proportion of the professional jockeys in Ireland have low-normal BMD, low BMI, and high bone turnover that may result from weight and dietary restrictions. These factors seem to have a deleterious effect on their bone health and predispose the jockeys to a high fracture risk that should be remediated.
    Language
    eng
    ISSN
    1433-2965 (Electronic)
    0937-941X (Linking)
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00198-009-0887-0
    Scopus Count
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    Tallaght University Hospital

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