Sweat Electrolyte Loss in Asthmatic Children During Exercise in the Heat

• Autores: Orlando Laitano, Jocelito Martins, Rita Mattiello
• Localización: Pediatric exercise science, ISSN 0899-8493, Vol. 20, Nº. 2, 2008, págs. 121-128
• Idioma: inglés
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• Resumen

  • This study assessed sweat electrolyte concentration and losses in asthmatic children during exercise in the heat. Eleven asthmatics (AG; 11 ± 2 years old) and 11 nonasthmatics (CG; 10 ± 1 year old) underwent a maximal progressive cycleergometer test. During a second session, participants cycled in the heat (35°C, 60% RH) of a climatic chamber for 30 min at 50�60% of maximal workload. Sweat was collected using sweat patches attached to the dorsal region. No differences were observed in sweat [Na+] (AG = 35 ± 12.9 and CG = 43.4 ± 18 mmol/L) and [Cl-] (AG = 27.3 ± 10.4 and CG = 38.5 ± 19.1 mmol/L). There was no difference in sweat Na+ losses (AG = 0.47 ± 0.36 and CG = 0.66 ± 0.68 mmol/kg/h) and Cl- losses (AG = 0.37 ± 0.29 and CG = 0.59 ± 0.62 mmol/kg/h) between groups. Asthmatic children did not differ from nonasthmatics in their sweat electrolyte concentrations and electrolyte losses.