Maintained hydration status after a 24-h winter mountain running race under extremely cold conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26630%2F19%3APU130191" target="_blank" >RIV/00216305:26630/19:PU130191 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6336898/" target="_blank" >https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6336898/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fphys.2018.01959" target="_blank" >10.3389/fphys.2018.01959</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Maintained hydration status after a 24-h winter mountain running race under extremely cold conditions

Popis výsledku v původním jazyce

Background: To date, no study has examined the hydration status of runners competing in a 24-h winter race under extremely cold environmental conditions. Therefore, the aim was to examine the effect of a 24-h race under an average temperature of -14.3◦C on hydration status. Methods: Blood and urine parameters and body mass (BM) were assessed in 20 finishers (women,n= 6; men,n= 14) pre- and post-race. Results: Five (25%) ultra-runners had lower pre-race plasma sodium [Na+] and 11(52%) had higher pre-race plasma potassium [K+] values than the reference ranges.Post-race plasma [Na+], plasma osmolality, urine osmolality and urine specific gravity remained stable (p > 0.05). The estimated fluid intake did not differ (p>0.05) between women (0.30±0.06 L/h) and men (0.46±0.21 L/h). Runners with a higher number of completed ultra-marathons (r=−0.50,p= 0.024) and higher number of training kilometers (r=−0.68,p= 0.001) drank less than those with lower running experience. Pre-race and post-race plasma [Na+] were related to plasma osmolality (r= 0.65,p= 0.002,r= 0.69,p<0.001, respectively) post-race, but not to fluid intake (p>0.05). BM significantly decreased post-race (p= 0.002) and was not related to plasma [Na+]or fluid intake (p>0.05). Post-race hematocrit and plasma [K+] decreased (p<0.001)and transtubular potassium gradient increased (p= 0.008). Higher pre-race plasma [K+]was related to higher plasma [K+] loss post-race (p =−0.85,p<0.001). Conclusion: Hydration status remained stable despite the extremely cold winterweather conditions. Overall fluid intake was probably sufficient to replenish the hydrationneeds of 24-h runners. Current recommendations may be too high for athletes competing in extremely cold conditions.

Název v anglickém jazyce

Maintained hydration status after a 24-h winter mountain running race under extremely cold conditions

Popis výsledku anglicky

Background: To date, no study has examined the hydration status of runners competing in a 24-h winter race under extremely cold environmental conditions. Therefore, the aim was to examine the effect of a 24-h race under an average temperature of -14.3◦C on hydration status. Methods: Blood and urine parameters and body mass (BM) were assessed in 20 finishers (women,n= 6; men,n= 14) pre- and post-race. Results: Five (25%) ultra-runners had lower pre-race plasma sodium [Na+] and 11(52%) had higher pre-race plasma potassium [K+] values than the reference ranges.Post-race plasma [Na+], plasma osmolality, urine osmolality and urine specific gravity remained stable (p > 0.05). The estimated fluid intake did not differ (p>0.05) between women (0.30±0.06 L/h) and men (0.46±0.21 L/h). Runners with a higher number of completed ultra-marathons (r=−0.50,p= 0.024) and higher number of training kilometers (r=−0.68,p= 0.001) drank less than those with lower running experience. Pre-race and post-race plasma [Na+] were related to plasma osmolality (r= 0.65,p= 0.002,r= 0.69,p<0.001, respectively) post-race, but not to fluid intake (p>0.05). BM significantly decreased post-race (p= 0.002) and was not related to plasma [Na+]or fluid intake (p>0.05). Post-race hematocrit and plasma [K+] decreased (p<0.001)and transtubular potassium gradient increased (p= 0.008). Higher pre-race plasma [K+]was related to higher plasma [K+] loss post-race (p =−0.85,p<0.001). Conclusion: Hydration status remained stable despite the extremely cold winterweather conditions. Overall fluid intake was probably sufficient to replenish the hydrationneeds of 24-h runners. Current recommendations may be too high for athletes competing in extremely cold conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30105 - Physiology (including cytology)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Frontiers in Physiology

ISSN

1664-042X

e-ISSN

—

Svazek periodika

neuveden

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

1959-1969

Kód UT WoS článku

000455549100001

EID výsledku v databázi Scopus

2-s2.0-85065512981