Description of three female 24-H Uultra-endurance race winners in various weather conditions and disciplines

CHLÍBKOVÁ, Daniela, Thomas ROSEMANN, Beat KNECHTLE, Pantelis Theodoros NIKOLAIDIS, Alena ŽÁKOVSKÁ and K. SUDI. Description of three female 24-H Uultra-endurance race winners in various weather conditions and disciplines. Chinese Journal of Physiology. TAIPEI, TAICHUNG, TAIWAN: CHINESE PHYSIOLOGICAL SOC, 2017, vol. 60, No 4, p. 231-241. ISSN 0304-4920. Available from: https://dx.doi.org/10.4077/CJP.2017.BAF443.

Basic information

• Original name: Description of three female 24-H Uultra-endurance race winners in various weather conditions and disciplines
• Name in Czech: Popis tří vítězek 24hodinového závodu za různých povětrnostních podmínek a v různých disciplínách
• Authors: CHLÍBKOVÁ, Daniela (203 Czech Republic, guarantor), Thomas ROSEMANN (756 Switzerland), Beat KNECHTLE (756 Switzerland), Pantelis Theodoros NIKOLAIDIS (300 Greece), Alena ŽÁKOVSKÁ (203 Czech Republic, belonging to the institution) and K. SUDI (756 Switzerland).
• Edition: Chinese Journal of Physiology, TAIPEI, TAICHUNG, TAIWAN, CHINESE PHYSIOLOGICAL SOC, 2017, 0304-4920.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 30105 Physiology
• Country of publisher: China
• Confidentiality degree: is not subject to a state or trade secret
• Impact factor: Impact factor: 0.827
• RIV identification code: RIV/00216224:14310/17:00097183
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.4077/CJP.2017.BAF443
• UT WoS: 000409566300005
• Keywords (in Czech): Horská cyklistika; běh; 24 hodin závod
• Keywords in English: mountain biking; running; 24-h-race
• Tags: NZ, rivok
• Tags: International impact, Reviewed

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 levels of 134 mmol/L (Case 1), 133 mmol/L (Case 2) and 134 mmol/L (Case 3). Moreover, Case 1 and Case 2 showed elevated creatine kinase 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 decreased urine specific gravity and urine osmolality suggested over-drinking in Case 1. 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.

Abstract (in Czech)

Výskyt cvičením způsobené hyponatrémie (EAH) je vyšší u žen než u mužů. Představujeme tři případy velmi mírné EAH u tří vítězek 24-h ultra závodů v různých povětrnostních podmínkách a disciplínách. Pozávodní hladina sodíku [Na +] v plasmě činila 134 mmol/L (případ 1), 133 mmol/L (případ 2) a 134 mmol/L (případ 3). Navíc případ 1 a případ 2 prokázali zvýšení kreatinkinázy v koncentracích větších než 10 000 U/L s absencí abnormální funkce ledvin.