Scullion Luke, Baker Dane, Healey Phillip, Edwards Antony, Love Thomas, Black Katherine
1 Department of Human Nutrition, University of Otago, Dunedin, New Zealand.
2 Chief Super Rugby Franchise, Hamilton, New Zealand.
Int J Vitam Nutr Res. 2018 Feb;88(1-2):8-15. doi: 10.1024/0300-9831/a000285. Epub 2019 Apr 11.
Upper respiratory tract infections are the most common infections reported by elite athletes. Low vitamin D status has been associated with an increased risk of upper respiratory tract infections. The aim of this study was to investigate associations between serum 25-hydroxyvitamin D (25(OH)D), salivary immunoglobulin A (S-IgA) concentrations, and acute respiratory tract infections (colds/flu) (ARI) in elite rowers and rugby players. A total of 53 (23 rugby players, 30 rowers) elite New Zealand athletes volunteered to participate in an interview, and to provide a blood and a saliva sample. Testing occurred twice, 6 months apart. Athletes' serum 25(OH)D concentrations and s-IgA levels were both significantly higher in summer, 108.9 (CI 102.8, 115.4) nmol/L, than in winter, 86.8 (CI 81.8, 92.1) nmol/L (p < 0.01, p = 0.028). The occurrence of an acute respiratory tract infection did not differ significantly between the time points (p = 0.322). However, ARI duration was significantly longer in winter than in summer (6.9 ± 4.3 days vs 4.8 ± 3.0 days; p = 0.044). There were no significant correlations between athletes' 25(OH)D levels and their s-IgA levels (p > 0.05) nor with acute respiratory tract infection occurrence (p > 0.05) nor duration (p > 0.05) in summer or winter. These findings suggest there may not be any associations between serum 25(OH)D concentrations and acute respiratory tract infections in this population. However, this null finding may be attributed to the high vitamin D concentrations seen in these athletes.
上呼吸道感染是精英运动员报告的最常见感染。维生素D水平低与上呼吸道感染风险增加有关。本研究的目的是调查精英赛艇运动员和橄榄球运动员血清25-羟基维生素D（25(OH)D）、唾液免疫球蛋白A（S-IgA）浓度与急性呼吸道感染（感冒/流感）（ARI）之间的关联。共有53名（23名橄榄球运动员，30名赛艇运动员）新西兰精英运动员自愿参加访谈，并提供血液和唾液样本。测试进行了两次，间隔6个月。运动员的血清25(OH)D浓度和s-IgA水平在夏季均显著高于冬季，夏季为108.9（CI 102.8，115.4）nmol/L，冬季为86.8（CI 81.8，92.1）nmol/L（p < 0.01，p = 0.028）。急性呼吸道感染的发生率在各时间点之间无显著差异（p = 0.322）。然而，冬季ARI的持续时间显著长于夏季（6.9±4.3天对4.8±3.0天；p = 0.044）。在夏季或冬季，运动员的25(OH)D水平与他们的s-IgA水平之间（p > 0.05）、与急性呼吸道感染的发生率（p > 0.05）或持续时间（p > 0.05）均无显著相关性。这些发现表明，在这一人群中，血清25(OH)D浓度与急性呼吸道感染之间可能没有任何关联。然而，这一零结果可能归因于这些运动员中观察到的高维生素D浓度。
