Dysnatremia among runners in a half marathon performed under warm and humid conditions The so-called dysnatremia was associated with sporty activities, especially long-distance races and endurance sports.
A high fluid intake is associated with a hyponatremia. This current study aimed to evaluate the dysnatremia and risk factors in half-marathon runners under warm and humid ambient conditions.At the 2017 CALI Half Marathon, a cross-section study was carried out with randomly selected runners.Runners with diuretics therapy or known kidney disease were excluded. The participants ran a two-day investigation.In the first assessment, the history, training history, the body mass index and the history were determined. The symptoms of dysnatremia and fluid consumption during the race were registered during the second assessment, and a blood collection with serum sodium was carried out after the barrel. 130 runners were involved in the study.The complete 2-day rating was carried out at 81 participants (62%), which were included in the final analysis.No cases of hyponatremia were found.Instead, there were six cases of asymptomatic hyperremia (7.4%). These hyperremia had a statistically significant relationship with lower frequency and volume of fluid intake during the race. Hyponatremia was associated with high fluid absorption at races in cool weather like the Boston Marathon in the spring.In contrast, a hyperriaemia was more likely to be found in a half marathon with warm and humid weather, resulting in a smaller volume and a lower frequency of fluid intake. This suggests that a mean fluid intake of 900 ml could prevent this event during the race under warm and humid conditions of this event. The study can be found under https://pubmed.ncbi.nlm.nih.gov/29955376/