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Skeletal muscle water and electrolytes following prolonged dehydrating exercise

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dc.contributor.author Mora-Rodríguez, Ricardo
dc.contributor.author Fernández-Elías, Valentín Emilio
dc.contributor.author Ortega, Juan Fernando
dc.contributor.author Hamouti, Nassim
dc.date.accessioned 2018-02-28T18:29:35Z
dc.date.available 2018-02-28T18:29:35Z
dc.date.issued 2015
dc.identifier.citation Scandinavian Journal of medicine & science in sports. 2015, 25, (274-282) es_ES
dc.identifier.uri http://hdl.handle.net/10578/16551
dc.description.abstract We studied if dehydrating exercise would reduce muscle water (H2Omuscle) and affect muscle electrolyte concentrations. Vastus lateralis muscle biopsies were collected prior, immediately after, and 1 and 4 h after prolonged dehydrating exercise (150 min at 33 ± 1 °C, 25% ± 2% humidity) on nine endurance-trained cyclists (VO2max = 54.4 ± 1.05 mL/kg/min). Plasma volume (PV) changes and fluid shifts between compartments (Cl− method) were measured. Exercise dehydrated subjects 4.7% ± 0.3% of body mass by losing 2.75 ± 0.15 L of water and reducing PV 18.4% ± 1% below pre-exercise values (P < 0.05). Right after exercise H2Omuscle remained at pre-exercise values (i.e., 398 ± 6 mL/100 g dw muscle−1) but declined 13% ± 2% (342 ± 12 mL/100 g dw muscle−1; P < 0.05) after 1 h of supine rest. At that time, PV recovered toward pre-exercise levels. The Cl− method corroborated the shift of fluid between extracellular and intracellular compartments. After 4 h of recovery, PV returned to preexercise values; however, H2Omuscle remained reduced at the same level. Muscle Na+ and K+ increased (P < 0.05) in response to the H2Omuscle reductions. Our findings suggest that active skeletal muscle does not show a net loss of H2O during prolonged dehydrating exercise. However, during the first hour of recovery H2Omuscle decreases seemly to restore PV and thus cardiovascular stability. es_ES
dc.format text/plain es_ES
dc.language.iso en es_ES
dc.publisher John Wiley and Sons es_ES
dc.rights info:eu-repo/semantics/openAccess es_ES
dc.subject Exercise
dc.subject Plasma volume
dc.subject Body water
dc.subject Water loss
dc.subject Intracellular fluid
dc.subject Extracellular fluid
dc.subject Ejercicio físico
dc.subject Volumen de plasma
dc.subject Agua corporal
dc.subject Perdida de agua
dc.subject Líquido intracelular
dc.subject Fluido extracelular
dc.title Skeletal muscle water and electrolytes following prolonged dehydrating exercise es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.identifier.DOI 10.1111/sms.12316

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