Magee Pamela J, Pourshahidi L Kirsty, Wallace Julie M W, Cleary John, Conway Joe, Harney Edward, Madigan Sharon M
Northern Ireland Centre for Food and Health, University of Ulster, Coleraine, Northern Ireland.
Int J Sport Nutr Exerc Metab. 2013 Oct;23(5):441-8. doi: 10.1123/ijsnem.23.5.441. Epub 2013 Mar 26.
A high prevalence of vitamin D insufficiency/deficiency, which may impact on health and training ability, is evident among athletes worldwide. This observational study investigated the vitamin D status of elite Irish athletes and determined the effect of wintertime supplementation on status.
Serum 25-hydroxyvitamin D [25(OH)D], calcium, and plasma parathyroid hormone were analyzed in elite athletes in November 2010 (17 boxers, 33 paralympians) or March 2011 (34 Gaelic Athletic Association [GAA] players). A subset of boxers and paralympians (n = 27) were supplemented during the winter months with either 5,000 IU vitamin D3/d for 10-12 weeks or 50,000 IU on one or two occasions. Biochemical analysis was repeated following supplementation.
Median 25(OH)D of all athletes at baseline was 48.4 nmol/L. Vitamin D insufficiency/deficiency (serum 25(OH)D <50 nmol/L) was particularly evident among GAA players (94%) due to month of sampling. Wintertime supplementation (all doses) significantly increased 25(OH)D (median 62.8 nmol/L at baseline vs. 71.1 nmol/L in April or May; p = .001) and corrected any insufficiencies/deficiencies in this subset of athletes. In contrast, 25(OH)D significantly decreased in those that did not receive a vitamin D supplement, with 74% of athletes classed as vitamin D insufficient/deficient after winter, compared with only 35% at baseline.
This study has highlighted a high prevalence of vitamin D insufficiency/ deficiency among elite Irish athletes and demonstrated that wintertime vitamin D3 supplementation is an appropriate regimen to ensure vitamin D sufficiency in athletes during winter and early spring.
维生素D不足/缺乏在全球运动员中普遍存在，这可能会影响健康和训练能力。这项观察性研究调查了爱尔兰精英运动员的维生素D状况，并确定了冬季补充维生素D对其状况的影响。
于2010年11月（17名拳击运动员、33名残奥会运动员）或2011年3月（34名盖尔运动协会[GAA]运动员）对精英运动员的血清25-羟基维生素D [25(OH)D]、钙和血浆甲状旁腺激素进行分析。一部分拳击运动员和残奥会运动员（n = 27）在冬季的几个月里，每天补充5000 IU维生素D3，持续10 - 12周，或分一到两次补充50000 IU。补充后重复进行生化分析。
所有运动员基线时的25(OH)D中位数为48.4 nmol/L。由于采样月份的原因，维生素D不足/缺乏（血清25(OH)D <50 nmol/L）在GAA运动员中尤为明显（94%）。冬季补充（所有剂量）显著提高了25(OH)D（基线时中位数为62.8 nmol/L，4月或5月为71.1 nmol/L；p = 0.001），并纠正了该组运动员的任何不足/缺乏情况。相比之下，未接受维生素D补充剂的运动员25(OH)D显著下降，冬季后74%的运动员被归类为维生素D不足/缺乏，而基线时仅为35%。
本研究突出了爱尔兰精英运动员中维生素D不足/缺乏的高患病率，并表明冬季补充维生素D3是确保运动员在冬季和早春维生素D充足的合适方案。
