题名

Description of Three Female 24-h Ultra-Endurance Race Winners in Various Weather Conditions and Disciplines

DOI

10.4077/CJP.2017.BAF443

作者

Daniela Chlíbková;Thomas Rosemann;Beat Knechtle;Pantelis T. Nikolaidis;Alena Zákovská;Karl Sudi

关键词

mountain biking ; running ; 24-h-race

期刊名称

The Chinese Journal of Physiology

卷期/出版年月

60卷4期(2017 / 08 / 31)

页次

231 - 241

内容语文

英文

中文摘要

The incidence of exercise-associated hyponatremia (EAH) is higher in women than in men. We present three cases of a very mild post-race EAH in female winners of three 24-h ultra races in various weather conditions and disciplines with post-race plasma sodium [Na^+] levels of 134 mM (Case 1), 133 mM (Case 2) and 134 mM (Case 3). Moreover, Case 1 and Case 2 showed elevated creatine kinase (CK) concentrations of >10,000 U/l with an absence of renal function abnormality. The common characteristics were female sex, veteran recreational category, long race experience in the particular sports discipline, excellent race performance, similar total weekly training hours and the presence of luteal phase of the menstrual cycle during the race. Hematocrit and hemoglobin decreased and post-race K^+/Na^+ ratio in urine increased in all three cases. In addition, an increased body mass and a decreased urine specific gravity and urine osmolality suggested over-drinking in Case 1. A decrease in the glomerular filtration rate (GFR) and creatine clearance accompanied by an increase in urine [Na^+] may contribute to fluid overload in Cases 2 and 3. Furthermore, urine osmolality reached a level indicating antidiuretic hormone (ADH) secretion in all the present cases. Therefore, we recommend that race medical personnel should not forget to look for EAH even in fast and experienced female athletes and during races in different environmental conditions.

主题分类 醫藥衛生 > 基礎醫學
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