| Prevalence of Exercise-Associated Hyponatremia in Male Ultraendurance Athletes. | |
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MedLine Citation:
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PMID: 21427567 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE:: The prevalence of exercise-associated hyponatremia (EAH) has mainly been investigated in marathoners and Ironman triathletes. The aim of this study was to investigate the prevalence of EAH in male ultraendurance athletes in other disciplines, such as ultraswimming, ultracycling, and ultramarathon running. DESIGN:: Observational field study. SETTING:: "Marathon Swim" in Lake Zurich, the "Swiss Cycling Marathon," the "Swiss Bike Masters," the "100-km Lauf Biel," and the "Swiss Jura Marathon." PARTICIPANTS:: Fifteen ultraswimmers, 28 ultra-road cyclists, 37 ultra-mountain bikers, 95 ultramarathoners, and 25 mountain ultramarathoners. MAIN OUTCOME MEASURES:: Changes in body mass, plasma sodium, urinary specific gravity, and hematocrit were measured. The athletes recorded their intake of fluids. RESULTS:: Two swimmers (13%), 3 road cyclists (10.7%), no mountain bikers (0%), 5 ultramarathoners (5%), and 2 mountain ultramarathoners (8%) developed EAH. In the mountain bikers (r = -0.41) and the 100-km ultramarathoners (r = -0.52), fluid intake was significantly and negatively related to race time. In the mountain ultramarathoners, fluid consumption increased during the race. CONCLUSIONS:: The prevalence of EAH was no higher in ultraendurance athletes compared with existing reports on marathoners and Ironman triathletes. Of the 200 investigated ultraendurance athletes, 12 finishers (6%) developed EAH. |
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Authors:
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Beat Knechtle; Markus Gnädinger; Patrizia Knechtle; Reinhard Imoberdorf; Götz Kohler; Peter Ballmer; Thomas Rosemann; Oliver Senn |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-19 |
Journal Detail:
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Title: Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine Volume: - ISSN: 1536-3724 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-23 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9103300 Medline TA: Clin J Sport Med Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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From the *Gesundheitszentrum St. Gallen, St. Gallen, Switzerland; †Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland; ‡Departement Medizin, Klinik für Innere Medizin, Kantonsspital Winterthur, Switzerland; and §Radio Oncology, University Hospital, Basel, Switzerland. |
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