Different dehydration levels and their impact on blood ammonia, cognitive-motor performance, and muscle damage in acclimated runners

dc.contributor.authorOliveira, Natally M.
dc.contributor.authorSousa Filho, Luis F.
dc.contributor.authorFrança, Thássia C.
dc.contributor.authorCamerino, Saulo R.
dc.contributor.authorLima, Rafaela C.
dc.contributor.authorBarros Neto, João A.
dc.contributor.authorHerculano, Edla A.
dc.contributor.authorAraújo, Gustavo G. [UNESP]
dc.contributor.authorPrado, Eduardo S.
dc.contributor.institutionFederal University of Alagoas
dc.contributor.institutionUniversidade Federal de Sergipe (UFS)
dc.contributor.institutionUniversidade Federal da Bahia (UFBA)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal de Uberlândia (UFU)
dc.date.accessioned2023-07-29T12:39:55Z
dc.date.available2023-07-29T12:39:55Z
dc.date.issued2022-12-01
dc.description.abstractBACKGROUND: Prolonged exercise in the heat can promote dehydration, which could impair ammonia metabolism, cognitive-motor performance, and muscle damage. However, exercise heat acclimation induces physiological adaptations that improve performance, metabolism, and cellular protection. This study aimed to evaluate different dehydration levels and their impact on blood ammonia, cognitive-motor performance, and muscle damage after a race in the heat in acclimated runners. METHODS: Sixteen male amateur endurance runners performed a half marathon race. after the race, the runners were divided into two groups according to their percentage body mass change (Δ% BM): Δ% BM less than 3% (G1%; N.=8) and Δ% BM greater than or equal to 3% (G3%; N.=8). Hydration status, biochemical parameters, and cognitive-motor performance were assessed before and after the race. RESULTS: Blood ammonia concentrations were increased in both G1% (before: 46±26 µmol/L; after: 118±22 µmol/L) and G3% (before: 41±15 µmol/L; after: 108±15 µmol/L) groups. There was an early increase in all markers of muscle damage (creatine kinase [CK], lactate dehydrogenase [LDH], aspartate aminotransferase [AST], and alanine aminotransferase [ALT]) in both groups, but only LDH was greater in the G3% group than in the G1% group. Cognitive-motor performance did not differ between groups. CONCLUSIONS: Dehydration up to ~4% BM loss does not affect blood ammonia concentrations and cognitive-motor performance in acclimated runners. The results also suggest that exercising in the heat induces the early appearance of several markers of muscle damage in acclimated runners regardless of hydration status.en
dc.description.affiliationFederal University of Alagoas
dc.description.affiliationFederal University of Sergipe
dc.description.affiliationFederal University of Bahia
dc.description.affiliationPaulista State University
dc.description.affiliationFederal University of Uberlândia
dc.description.affiliationUnespPaulista State University
dc.format.extent1716-1722
dc.identifierhttp://dx.doi.org/10.23736/S0022-4707.22.13448-1
dc.identifier.citationJournal of Sports Medicine and Physical Fitness, v. 62, n. 12, p. 1716-1722, 2022.
dc.identifier.doi10.23736/S0022-4707.22.13448-1
dc.identifier.issn1827-1928
dc.identifier.issn0022-4707
dc.identifier.scopus2-s2.0-85142940088
dc.identifier.urihttp://hdl.handle.net/11449/246399
dc.language.isoeng
dc.relation.ispartofJournal of Sports Medicine and Physical Fitness
dc.sourceScopus
dc.subjectAcclimatization
dc.subjectAthletic performance
dc.subjectHeat stress disorders
dc.subjectMetabolism
dc.titleDifferent dehydration levels and their impact on blood ammonia, cognitive-motor performance, and muscle damage in acclimated runnersen
dc.typeArtigo

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