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Effect of a multistage ultraendurance triathlon on aldosterone, vasopressin, extracellular water and urine electrolytes


Knechtle, B; Hernández Morales, N P; Ruvalcaba González, E; Aguirre Gutierrez, A A; Noriega Sevilla, J; Amézquita Gómez, R; Estrada Robledo, A R; Marroquín Rodríguez, A L; Salas Fraire, O; Andonie, J L; Lopez, L C; Kohler, G; Rosemann, T (2012). Effect of a multistage ultraendurance triathlon on aldosterone, vasopressin, extracellular water and urine electrolytes. Scottish Medical Journal, 57(1):26-32.

Abstract

Prolonged endurance exercise over several days induces increase in extracellular water (ECW). We aimed to investigate an association between the increase in ECW and the change in aldosterone and vasopressin in a multistage ultraendurance triathlon, the 'World Challenge Deca Iron Triathlon' with 10 Ironman triathlons within 10 days. Before and after each Ironman, body mass, ECW, urinary [Na(+)], urinary [K(+)], urinary specific gravity, urinary osmolality and aldosterone and vasopressin in plasma were measured. The 11 finishers completed the total distance of 38 km swimming, 1800 km cycling and 422 km running within 145.5 (18.8) hours and 25 (22) minutes. ECW increased by 0.9 (1.1) L from 14.6 (1.5) L prerace to 15.5 (1.9) L postrace (P < 0.0001). Aldosterone increased from 70.8 (104.5) pg/mL to 102.6 (104.6) pg/mL (P = 0.033); vasopressin remained unchanged. The increase in ECW was related neither to postrace aldosterone nor to postrace vasopressin. In conclusion, ECW and aldosterone increased after this multistage ultraendurance triathlon, but vasopressin did not. The increase in ECW and the increase in aldosterone were not associated.

Prolonged endurance exercise over several days induces increase in extracellular water (ECW). We aimed to investigate an association between the increase in ECW and the change in aldosterone and vasopressin in a multistage ultraendurance triathlon, the 'World Challenge Deca Iron Triathlon' with 10 Ironman triathlons within 10 days. Before and after each Ironman, body mass, ECW, urinary [Na(+)], urinary [K(+)], urinary specific gravity, urinary osmolality and aldosterone and vasopressin in plasma were measured. The 11 finishers completed the total distance of 38 km swimming, 1800 km cycling and 422 km running within 145.5 (18.8) hours and 25 (22) minutes. ECW increased by 0.9 (1.1) L from 14.6 (1.5) L prerace to 15.5 (1.9) L postrace (P < 0.0001). Aldosterone increased from 70.8 (104.5) pg/mL to 102.6 (104.6) pg/mL (P = 0.033); vasopressin remained unchanged. The increase in ECW was related neither to postrace aldosterone nor to postrace vasopressin. In conclusion, ECW and aldosterone increased after this multistage ultraendurance triathlon, but vasopressin did not. The increase in ECW and the increase in aldosterone were not associated.

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Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of General Practice
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:2012
Deposited On:16 Aug 2012 09:13
Last Modified:05 Apr 2016 15:55
Publisher:Royal Society of Medicine Press
ISSN:0036-9330
Additional Information:Knechtle, B; Hernández Morales, N P; Ruvalcaba González, E; Aguirre Gutierrez, A A; Noriega Sevilla, J; Amézquita Gómez, R; Estrada Robledo, A R; Marroquín Rodríguez, A L; Salas Fraire, O; Andonie, J L; Lopez, L C; Kohler, G; Rosemann, T (2012). Effect of a multistage ultraendurance triathlon on aldosterone, vasopressin, extracellular water and urine electrolytes. Scottish Medical Journal, 57(1):26-32, DOI: 10.1258/smj.2011.011287. This is the final draft, after peer-review, of a manuscript published in RSM journals: www.rsmpress.com.
Publisher DOI:10.1258/smj.2011.011287
PubMed ID:22408212
Permanent URL: http://doi.org/10.5167/uzh-64225

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