Centre for Sports and Exercise Medicine, Queen Mary University of London, England.
Institute of Sport, Exercise and Health, University College London, England.
J Athl Train. 2018 Jul;53(7):696-702. doi: 10.4085/1062-6050-125-17. Epub 2018 Aug 13.
Exercise-associated hyponatremia (EAH) is a potentially fatal condition that can be prevented by avoiding excessive fluid intake. Running has become more popular in recent years, so it is important to assess the safety of runners' hydration strategies.
(1) To explore the intended hydration strategies of a sample of marathon runners before the 2014 London Marathon, (2) to examine their sources of information and knowledge about fluid intake and their understanding of EAH, and (3) to compare these findings with the results of a similar study carried out before the 2010 London Marathon.
Cross-sectional study.
The 2014 London Marathon.
A total of 298 runners (148 males, 150 females), 0.83% of all race finishers.
MAIN OUTCOME MEASURE(S): Planned frequency, type, and volume of hydration; sources of information about appropriate drinking; and understanding of hyponatremia were explored. Comparisons were made with data collected from a sample of participants at the 2010 London Marathon. Data relating to the 2014 cohort are presented in descriptive form. Comparisons of the 2010 and 2014 cohorts were conducted using parametric and nonparametric methods.
A total of 48.7% of the 2014 cohort listed drinking to thirst as the most important factor affecting their hydration strategy during the race. This compared with 25.3% of runners from the 2010 cohort and represented an increase (χ = 29.1, P = .001); 5.8% of the 2014 cohort planned on drinking more than 3.5 L, compared with 12% of the 2010 cohort (χ = 4.310, P = .038).
The number of sampled individuals using thirst to guide hydration strategies in the 2014 London Marathon increased from 2010. However, more than half of the 2014 cohort was not planning to drink to thirst. Runners still need to be educated about the risks of overdrinking as they continue to demonstrate a lack of knowledge and understanding.
运动相关性低钠血症（EAH）是一种潜在的致命病症，可以通过避免过度摄入液体来预防。近年来，跑步运动变得越来越流行，因此评估跑步者补水策略的安全性至关重要。
（1）探究 2014 年伦敦马拉松比赛前，部分马拉松参赛者的预期补水策略，（2）考察他们获取液体摄入相关信息和知识的来源，以及对 EAH 的理解，（3）并将这些发现与 2010 年伦敦马拉松比赛前进行的一项类似研究的结果进行比较。
横断面研究。
2014 年伦敦马拉松比赛。
共有 298 名参赛者（男性 148 名，女性 150 名），占所有完赛者的 0.83%。
计划的补水频率、类型和量；获取适当饮水相关信息的来源；以及对低钠血症的理解。与 2010 年伦敦马拉松比赛中收集的参与者数据进行比较。2014 年队列的数据以描述性形式呈现。使用参数和非参数方法对 2010 年和 2014 年队列进行比较。
2014 年队列中，有 48.7%的人列出“口渴”是影响比赛期间补水策略的最重要因素，而 2010 年这一比例为 25.3%，增加了（χ=29.1，P=.001）；2014 年队列中有 5.8%的人计划喝超过 3.5 升水，而 2010 年队列中有 12%的人（χ=4.310，P=.038）。
2014 年伦敦马拉松比赛中，通过口渴指导补水策略的样本人数从 2010 年开始增加。然而，仍有超过一半的 2014 年队列的人不打算根据口渴来补水。由于跑步者仍然缺乏相关知识和理解，因此需要对他们进行过度饮水风险方面的教育。
