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CHLÍBKOVÁ, D. ROSEMANN, T. KNECHTLE, B. NIKOLAIDIS, P.T. ŽÁKOVSKÁ, A. SUDI, K.
Original Title
Description of Three Female 24-h Ultra-Endurance Race Winners in Various Weather Conditions and Disciplines
Type
journal article in Web of Science
Language
English
Original Abstract
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/I 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.
Keywords
mountain biking; running; 24-h-race
Authors
CHLÍBKOVÁ, D.; ROSEMANN, T.; KNECHTLE, B.; NIKOLAIDIS, P.T.; ŽÁKOVSKÁ, A.; SUDI, K.
Released
31. 8. 2017
Publisher
WOLTERS KLUWER MEDKNOW PUBLICATIONS
Location
MUMBAI
ISBN
0304-4920
Periodical
CHINESE JOURNAL OF PHYSIOLOGY
Year of study
60
Number
4
State
Republic of India
Pages from
231
Pages to
241
Pages count
11
URL
https://www.ncbi.nlm.nih.gov/pubmed/28847143
BibTex
@article{BUT133544, author="Daniela {Chlíbková} and Thomas {Rosemann} and Beat {Knechtle} and Pantelis T. {Nikolaidis} and Alena {Žákovská} and Karl {Südi}", title="Description of Three Female 24-h Ultra-Endurance Race Winners in Various Weather Conditions and Disciplines", journal="CHINESE JOURNAL OF PHYSIOLOGY", year="2017", volume="60", number="4", pages="231--241", doi="10.4077/CJP.2017.BAF443", issn="0304-4920", url="https://www.ncbi.nlm.nih.gov/pubmed/28847143" }