Bone mineral density in vocational and professional ballet dancers

Amorim, T., Koutedakis, Y., Nevill, A., Wyon, M., Maia, J., Machado, J. C., Marques, F., Metsios, G. S., Flouris, A. D., Adubeiro, N., Nogueira, L. and Dimitriou, Lygeri (2017) Bone mineral density in vocational and professional ballet dancers. Osteoporosis International, 28 (10). pp. 2903-2912. ISSN 0937-941X

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Abstract

Summary: According to existing literature, bone health in ballet dancers is controversial. We have verified that, compared to controls, young female and male vocational ballet dancers have lower bone mineral density (BMD) at both impact and non-impact sites, whereas female professional ballet dancers have lower BMD only at non-impact sites.

Introduction: The aims of this study were to (a) assess bone mineral density (BMD) in vocational (VBD) and professional (PBD) ballet dancers and (b) investigate its association with body mass (BM), fat mass (FM), lean mass (LM), maturation and menarche.

Methods: The total of 152 VBD (13 ± 2.3 years; 112 girls, 40 boys) and 96 controls (14 ± 2.1 years; 56 girls, 40 boys) and 184 PBD (28 ± 8.5 years; 129 females, 55 males) and 160 controls (27 ± 9.5 years; 110 female, 50 males) were assessed at the lumbar spine (LS), femoral neck (FN), forearm and total body by dual-energy X-ray absorptiometry. Maturation and menarche were assessed via questionnaires.

Results: VBD revealed lower unadjusted BMD at all anatomical sites compared to controls (p < 0.001); following adjustments for Tanner stage and gynaecological age, female VBD showed similar BMD values at impact sites. However, no factors were found to explain the lower adjusted BMD values in VBD (female and male) at the forearm (non-impact site), nor for the lower adjusted BMD values in male VBD at the FN. Compared to controls, female PBD showed higher unadjusted and adjusted BMD for potential associated factors at the FN (impact site) (p < 0.001) and lower adjusted at the forearm (p < 0.001). Male PBD did not reveal lower BMD than controls at any site.

Conclusions: both females and males VBD have lower BMD at impact and non-impact sites compared to control, whereas this is only the case at non-impact site in female PBD. Maturation seems to explain the lower BMD at impact sites in female VBD.

Item Type: Article
Research Areas: A. > School of Science and Technology > London Sport Institute > Physiology at the London Sport Institute
Item ID: 22963
Notes on copyright: This is a post-peer-review, pre-copyedit version of an article published in Osteoporosis International. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00198-017-4130-0
Useful Links:
Depositing User: Lygeri Dimitriou
Date Deposited: 17 Nov 2017 15:19
Last Modified: 18 Apr 2019 15:47
URI: https://eprints.mdx.ac.uk/id/eprint/22963

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