Department of Physical Education and Sport Sciences, University of Limerick, Limerick, Ireland.
Health Research Institute, University of Limerick, Limerick, Ireland; and.
J Strength Cond Res. 2020 Mar;34(3):782-790. doi: 10.1519/JSC.0000000000003019.
Tiernan, C, Lyons, M, Comyns, T, Nevill, AM, and Warrington, G. Salivary IgA as a predictor of upper respiratory tract infections and relationship to training load in elite rugby union players. J Strength Cond Res 34(3): 782-790, 2020-Upper Respiratory Tract Infections (URTI) are among the most common illnesses reported in athletes. An URTI can result in missed training days, which in turn may lead to performance decrements. The purpose of this study was to investigate the use of salivary immunoglobulin A (sIgA) as a predictor of URTI, while also exploring the relationship to weekly training load in elite rugby union players. Nineteen male elite rugby union players provided morning saliva swabs, biweekly (Monday and Friday), over a 10-week training period. Participants completed an illness log documenting symptoms of URTI. Session Rate of Perceived Exertion (sRPE) was collected to determine training load (sRPE × session duration). Weekly training load was also calculated. Logistic regression was used to analyze the relationship between incidences of URTI with sIgA and training load. Multilevel regression was conducted to compare associations between sIgA and training load. The results found that the likelihood of suffering from an URTI increased when sIgA significantly decreased (p = 0.046). Where sIgA decreased by 65% or more, a player was at a greater risk of contracting an URTI within the following 2 weeks. No association was found between sIgA and training load. In conclusion, sIgA may be a useful predictor for determining the likelihood of players contracting an URTI. This will allow the coach to make informed decisions on training status, helping reduce the risk of players missing training, which may have performance decrements. Coaches will benefit from the fast, easy, and instant results available, to analyze a player's immune function.
蒂尔南、C、莱昂斯、M、科明斯、T、内维尔、AM 和沃林顿、G. 唾液免疫球蛋白 A 作为上呼吸道感染的预测因子，以及与精英橄榄球联盟运动员训练负荷的关系。J 力量与调理研究 34（3）：782-790，2020-上呼吸道感染（URTI）是运动员中最常见的疾病之一。URTI 可导致训练日缺勤，进而可能导致表现下降。本研究的目的是调查唾液免疫球蛋白 A（sIgA）作为 URTI 预测因子的用途，同时探讨其与精英橄榄球联盟运动员每周训练负荷的关系。19 名男性精英橄榄球联盟运动员在 10 周的训练期间，每周两次（星期一和星期五）早上提供唾液拭子。参与者完成了一份记录 URTI 症状的疾病日志。会话感知用力（sRPE）被收集来确定训练负荷（sRPE×会话持续时间）。每周训练负荷也进行了计算。逻辑回归用于分析 URTI 与 sIgA 和训练负荷之间的关系。多水平回归用于比较 sIgA 和训练负荷之间的关联。结果发现，当 sIgA 显著下降时（p = 0.046），患 URTI 的可能性增加。当 sIgA 下降 65%或更多时，球员在接下来的 2 周内患 URTI 的风险更高。sIgA 与训练负荷之间没有关联。结论：sIgA 可能是确定球员患 URTI 可能性的有用预测因子。这将使教练能够根据训练状况做出明智的决策，有助于降低球员错过训练的风险，这可能会导致表现下降。教练将受益于可用的快速、简单和即时的结果，以分析球员的免疫功能。
