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001-es BibID:	BIBFORM115080
035-os BibID:	(cikkazonosító)e0277978 (Scopus)85145425908 (WoS)000925813500041
Első szerző:	Komka Zsolt
Cím:	Exercise-related hemoconcentration and hemodilution in hydrated and dehydrated athletes: An observational study of the Hungarian canoeists / Komka, Zsolt; Szilágyi, Brigitta; Molnár, Dóra; Sipos, Bence; Tóth, Miklós; Sonkodi, Balázs; Ács, Pongrác; Elek, János; Szász, Máté
Dátum:	2022
ISSN:	1932-6203
Megjegyzések:	Hemoconcentration during exercise is a well-known phenomenon, however, the extent to which dehydration is involved is unclear. In our study, the effect of dehydration on exerciseinduced hemoconcentration was examined in 12 elite Hungarian kayak-canoe athletes. The changes of blood markers were examined during acute maximal workload in hydrated and dehydrated states. Dehydration was achieved by exercise, during a 120-minute extensive-aerobic preload. Our research is one of the first studies in which the changes in blood components were examined with a higher time resolution and a wider range of the measured parameters. Hydration status had no effect on the dynamics of hemoconcentration during both the hydrated (HS) and dehydrated (DHS) load, although lower maximal power output were measured after the 120-minute preload [HS Hemoglobin(Hgb)(Max) median 17.4 (q1 17.03; q3 17.9) g/dl vs. DHS Hgb(Max) median 16.9 (q1 16.43; q3 17.6) g/dl (n.s); HS Hematocrit(Hct)(Max) 53.50 (q1 52.28; q3 54.8)% vs. DHS Hct(Max) 51.90 (q1 50.35; q3 53.93)%(n.s)]. Thirty minutes after the maximal loading, complete hemodilution was confirmed in both exercises. Dehydration had no effect on hemoconcentration or hemodilution in the recovery period [HS Hgb(R30') 15.7 (q1 15.15; q3 16.05) g/dl (n.s.) vs. DHS Hgb(R30') 15.75 (q1 15.48; q3 16.13) g/dl (n.s.), HS Hct(R30') 48.15 (q1 46.5; q3 49.2)% vs. DHS Hct(R30') 48.25 (q1 47.48; q3 49.45)%(n.s.)], however, plasma osmolality did not follow a corresponding decrease in hemoglobin and hematocrit in the dehydrated group. Based on our data, metabolic products (glucose, lactate, sodium, potassium, chloride, bicarbonate ion, blood urea nitrogen) induced osmolality may not play a major role in the regulation of hemoconcentration and post-exercise hemodilution. From our results, we can conclude that hemoconcentration depends mainly on the intensity of the exercise.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Plos One. - 17 : 12 (2022), p. 1-18. -
További szerzők:	Szilágyi Brigitta Molnár Dóra Sipos Bence Tóth Miklós Sonkodi Balázs Ács Pongrác Elek János (1974) (vegyész) Szász Máté
Pályázati támogatás:	GINOP-2.3.1-20-2020-00007 GINOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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