Pre- and Post-Race Hydration Status in Hyponatremic and Non-Hyponatremic Ultra-Endurance Athletes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11110%2F16%3A10327345" target="_blank" >RIV/00216208:11110/16:10327345 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26630/16:PU116664

Výsledek na webu

<a href="http://dx.doi.org/10.4077/CJP.2016.BAE391" target="_blank" >http://dx.doi.org/10.4077/CJP.2016.BAE391</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4077/CJP.2016.BAE391" target="_blank" >10.4077/CJP.2016.BAE391</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pre- and Post-Race Hydration Status in Hyponatremic and Non-Hyponatremic Ultra-Endurance Athletes

Popis výsledku v původním jazyce

The monitoring of body mass (BM) plasma sodium concentration ([Na+]) and urinary specific gravity (U-sg) are com-monly used to help detect and prevent over- or dehydration in endurance athletes. We investigated pre-and post-race hydration status in 113 amateur 24-h ultra-runners, 100-km ultra-runners, multi-stage mountain bikers and 24-h mountain bikers, which drank ad libitum without any intervention and compared results of hyponatremic and non-hyponatremic finishers. On average, pre-race plasma [Na+] and both pre- and post-race levels of U-sg and BM were not significantly different between both groups. However, nearly 86% of the post-race hyponatremic (exercise-associated hyponatremia, EAH) and 68% of the normonatremic (non-EAH) ultra-athletes probably drank prior the race greater volumes than their thirst dictated regarding to individual pre race U-sg levels. Fluid intake during the race was equal and was not related to plasma [Na+], U-sg or BM changes. A significant decrease in post-race plasma [Na+], BM and an increasement in post-race U-sg was observed in EAH and non-EAH finishers. Moreover, pre-race plasma [Na+] was inversely associated with post-race percentage change in plasma [Na+], and pre-race U-sg and urinary [Na+] with percentage change in U-sg in both groups with and without post-race EAH. Thirteen (11.5%) finishers developed post-race EAH (plasma [Na+] < 135 mM). The incidence of EAH in ultra-endurance athletes competing in the Czech Republic was higher than reported previously.

Název v anglickém jazyce

Pre- and Post-Race Hydration Status in Hyponatremic and Non-Hyponatremic Ultra-Endurance Athletes

Popis výsledku anglicky

The monitoring of body mass (BM) plasma sodium concentration ([Na+]) and urinary specific gravity (U-sg) are com-monly used to help detect and prevent over- or dehydration in endurance athletes. We investigated pre-and post-race hydration status in 113 amateur 24-h ultra-runners, 100-km ultra-runners, multi-stage mountain bikers and 24-h mountain bikers, which drank ad libitum without any intervention and compared results of hyponatremic and non-hyponatremic finishers. On average, pre-race plasma [Na+] and both pre- and post-race levels of U-sg and BM were not significantly different between both groups. However, nearly 86% of the post-race hyponatremic (exercise-associated hyponatremia, EAH) and 68% of the normonatremic (non-EAH) ultra-athletes probably drank prior the race greater volumes than their thirst dictated regarding to individual pre race U-sg levels. Fluid intake during the race was equal and was not related to plasma [Na+], U-sg or BM changes. A significant decrease in post-race plasma [Na+], BM and an increasement in post-race U-sg was observed in EAH and non-EAH finishers. Moreover, pre-race plasma [Na+] was inversely associated with post-race percentage change in plasma [Na+], and pre-race U-sg and urinary [Na+] with percentage change in U-sg in both groups with and without post-race EAH. Thirteen (11.5%) finishers developed post-race EAH (plasma [Na+] < 135 mM). The incidence of EAH in ultra-endurance athletes competing in the Czech Republic was higher than reported previously.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

ED - Fyziologie

OECD FORD obor

—

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chinese Journal of Physiology

ISSN

0304-4920

e-ISSN

—

Svazek periodika

59

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

TW - Čínská republika (Tchaj-wan)

Počet stran výsledku

11

Strana od-do

173-183

Kód UT WoS článku

000378982100006

EID výsledku v databázi Scopus

2-s2.0-84977488986