Backx Evelien, van der Avoort Cindy, Tieland Michael, Maase Kamiel, Kies Arie, van Loon Luc, de Groot Lisette, Mensink Marco
Int J Sport Nutr Exerc Metab. 2017 Feb;27(1):6-10. doi: 10.1123/ijsnem.2016-0177. Epub 2016 Oct 6.
Studies monitoring vitamin D status in athletes are seldom conducted for a period of 12 months or longer, thereby lacking insight into seasonal fluctuations. The objective of the current study was to identify seasonal changes in total 25-hydroxyvitamin D (25(OH)D) concentration throughout the year. Fifty-two, mainly Caucasian athletes with a sufficient 25(OH)D concentration (>75 nmol/L) in June were included in this study. Serum 25(OH)D concentration was measured every three months (June, September, December, March, June). In addition, vitamin D intake and sun exposure were assessed by questionnaires at the same time points. Highest total 25(OH)D concentrations were found at the end of summer (113 ± 26 nmol/L), whereas lowest concentrations were observed at the end of winter (78 ± 30 nmol/L). Although all athletes had a sufficient 25(OH)D concentration at the start of the study, nearly 20% of the athletes were deficient (<50 nmol/L) in late winter.
针对运动员维生素D状态的监测研究很少持续12个月或更长时间，因此缺乏对季节性波动的深入了解。本研究的目的是确定全年总25-羟基维生素D（25(OH)D）浓度的季节性变化。本研究纳入了52名主要为白种人的运动员，他们在6月份的25(OH)D浓度充足（>75 nmol/L）。每三个月（6月、9月、12月、3月、6月）测量一次血清25(OH)D浓度。此外，在相同时间点通过问卷评估维生素D摄入量和阳光照射情况。在夏末发现总25(OH)D浓度最高（113±26 nmol/L），而在冬末观察到浓度最低（78±30 nmol/L）。尽管所有运动员在研究开始时25(OH)D浓度充足，但近20%的运动员在冬末时缺乏（<50 nmol/L）。
