2.50
Hdl Handle:
http://hdl.handle.net/2436/297895
Title:
Vitamin D status in professional ballet dancers: Winter vs. summer.
Authors:
Wolman, Roger; Wyon, Matthew A.; Koutedakis, Yiannis; Nevill, Alan M.; Eastell, Richard; Allen, Nick
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±8.86yr; height 1.66±8.84m; mass 54.3±10.47kg) 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 (14.9ng/ml vs. 23.9ng/ml; p<0.001), PTH (38.7pg/ml vs. 26.3pg/ml; p<0.001) and PINP (89.9ng/ml vs. 67.6ng/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.
Citation:
Vitamin D status in professional ballet dancers: Winter vs. summer. 2013: J Sci Med Sport
Journal:
Journal of science and medicine in sport / Sports Medicine Australia
Issue Date:
1-Feb-2013
URI:
http://hdl.handle.net/2436/297895
DOI:
10.1016/j.jsams.2012.12.010
PubMed ID:
23379989
Type:
Article
Language:
en
ISSN:
1878-1861
Appears in Collections:
Sport, Exercise and Health Research Group

Full metadata record

DC FieldValue Language
dc.contributor.authorWolman, Rogeren_GB
dc.contributor.authorWyon, Matthew A.en_GB
dc.contributor.authorKoutedakis, Yiannisen_GB
dc.contributor.authorNevill, Alan M.en_GB
dc.contributor.authorEastell, Richarden_GB
dc.contributor.authorAllen, Nicken_GB
dc.date.accessioned2013-08-12T14:44:36Z-
dc.date.available2013-08-12T14:44:36Z-
dc.date.issued2013-02-01-
dc.identifier.citationVitamin D status in professional ballet dancers: Winter vs. summer. 2013: J Sci Med Sporten_GB
dc.identifier.issn1878-1861-
dc.identifier.pmid23379989-
dc.identifier.doi10.1016/j.jsams.2012.12.010-
dc.identifier.urihttp://hdl.handle.net/2436/297895-
dc.description.abstractOBJECTIVE: 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±8.86yr; height 1.66±8.84m; mass 54.3±10.47kg) 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 (14.9ng/ml vs. 23.9ng/ml; p<0.001), PTH (38.7pg/ml vs. 26.3pg/ml; p<0.001) and PINP (89.9ng/ml vs. 67.6ng/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.en_GB
dc.languageENG-
dc.language.isoenen
dc.rightsArchived with thanks to Journal of science and medicine in sport / Sports Medicine Australiaen_GB
dc.titleVitamin D status in professional ballet dancers: Winter vs. summer.en
dc.typeArticleen
dc.identifier.journalJournal of science and medicine in sport / Sports Medicine Australiaen_GB

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