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Vitamin D status in professional ballet dancers: Winter vs. summer
dc.creator | Wolman, R. | en |
dc.creator | Wyon, M. A. | en |
dc.creator | Koutedakis, Y. | en |
dc.creator | Nevill, A. M. | en |
dc.creator | Eastell, R. | en |
dc.creator | Allen, N. | en |
dc.date.accessioned | 2015-11-23T10:54:13Z | |
dc.date.available | 2015-11-23T10:54:13Z | |
dc.date.issued | 2013 | |
dc.identifier | 10.1016/j.jsams.2012.12.010 | |
dc.identifier.issn | 1440-2440 | |
dc.identifier.uri | http://hdl.handle.net/11615/34680 | |
dc.description.abstract | Objective: Serum 25-hydroxyvitamin D is produced by the exposure of the skin to sunlight. Therefore athletes who train indoors, such as dancers, are vulnerable to vitamin D deficiency. The purpose of the study was to evaluate the serum 25-hydroxyvitamin D status in UK professional dancers during periods of reduced and increased sunlight exposure (i.e., winter vs. summer), and to assess the impact on bone metabolism and risk of injury. Design: Cohort study. Methods: 19 elite classical ballet dancers (age 26 +/- 8.86 yr; height 1.66 +/- 8.84 m; mass 54.3 +/- 10.47 kg) were monitored over a 6 month period for 25-hydroxyvitamin D, PTH and blood serum bone turnover markers (CTX and PINP) along with injury data. Repeated measure ANOVA and Wilcoxon and Chi-square analyses were used and significance was set at p <= 0.05. Results: Significant changes were noted between the winter and summer test dates for 25-hydroxyvitamin D (14.9 ng/ml vs. 23.9 ng/ml; p < 0.001), PTH (38.7 pg/ml vs. 26.3 pg/ml; p < 0.001) and PINP (89.9 ng/ml vs. 67.6 ng/ml; p < 0.01). The oral contraceptive had a significant effect on serum 25-hydroxyvitamin D, PTH and CTX. Soft tissue injuries were significantly lower in summer compared to winter period (winter = 24, summer = 13; p < 0.05). Conclusions: Professional ballerinas characterized by a high incidence of low serum 25-hydroxyvitamin D levels which improve marginally in the summer. These dancers also demonstrate a higher injury incidence in the winter. Oral contraception seems to increase serum 25-hydroxyvitamin D levels and has a positive effect on bone metabolism. (C) 2013 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved. | en |
dc.source | Journal of Science and Medicine in Sport | en |
dc.source.uri | <Go to ISI>://WOS:000325194800002 | |
dc.subject | Vitamin D | en |
dc.subject | Bone metabolism | en |
dc.subject | Injury | en |
dc.subject | Oral contraceptive | en |
dc.subject | D DEFICIENCY | en |
dc.subject | STRESS-FRACTURES | en |
dc.subject | CONTROLLED-TRIAL | en |
dc.subject | MUSCLE STRENGTH | en |
dc.subject | SUPPLEMENTATION | en |
dc.subject | ASSOCIATION | en |
dc.subject | PERFORMANCE | en |
dc.subject | PREVALENCE | en |
dc.subject | INJURIES | en |
dc.subject | FEMALES | en |
dc.subject | Sport Sciences | en |
dc.title | Vitamin D status in professional ballet dancers: Winter vs. summer | en |
dc.type | journalArticle | en |
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