Department of Rheumatology and Sport and Exercise Medicine, Royal National Orthopaedic Hospital, Stanmore, UK.
J Sci Med Sport. 2013 Sep;16(5):388-91. doi: 10.1016/j.jsams.2012.12.010. Epub 2013 Feb 4.
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.
Cohort study.
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.
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).
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.
血清 25-羟维生素 D 是由皮肤暴露在阳光下产生的。因此，像舞蹈演员这样在室内训练的运动员容易患维生素 D 缺乏症。本研究的目的是评估英国专业舞蹈演员在减少和增加阳光暴露期间（即冬季与夏季）的血清 25-羟维生素 D 状况，并评估其对骨代谢和受伤风险的影响。
队列研究。
19 名精英古典芭蕾舞演员（年龄 26±8.86 岁；身高 1.66±8.84m；体重 54.3±10.47kg）在 6 个月的时间内监测血清 25-羟维生素 D、甲状旁腺激素和血液骨代谢标志物（CTX 和 PINP）以及受伤数据。采用重复测量方差分析和 Wilcoxon 和 Chi-square 分析，显著性水平设置为 p≤0.05。
冬季和夏季测试日期之间 25-羟维生素 D（14.9ng/ml 与 23.9ng/ml；p<0.001）、甲状旁腺激素（38.7pg/ml 与 26.3pg/ml；p<0.001）和 PINP（89.9ng/ml 与 67.6ng/ml；p<0.01）有显著变化。口服避孕药对血清 25-羟维生素 D、甲状旁腺激素和 CTX 有显著影响。与冬季相比，夏季软组织损伤明显较低（冬季=24，夏季=13；p<0.05）。
芭蕾舞演员血清 25-羟维生素 D 水平低，发生率高，夏季略有改善。这些舞者在冬季的受伤发生率也较高。口服避孕药似乎能提高血清 25-羟维生素 D 水平，并对骨代谢有积极影响。
