No change of body mass, fat mass, and skeletal muscle mass in ultraendurance swimmers after 12 hours of swimming
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| Deutscher übersetzter Titel: | Keine Veränderungen bei der Körpermasse, der Fettmasse und der Skelettmuskelmasse bei Schwimmern aus dem Ultra-Ausdauerbereich nach zwölfstündigem Schwimmen |
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| Autor: | Knechtle, Beat; Knechtle, Patrizia; Kaul, René; Kohler, Götz Franz Richard |
| Erschienen in: | Research quarterly for exercise and sport |
| Veröffentlicht: | 80 (2009), 1, S. 62-70, Lit. |
| Format: | Literatur (SPOLIT) |
| Publikationstyp: | Zeitschriftenartikel |
| Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
| Sprache: | Englisch |
| ISSN: | 0270-1367, 2168-3824 |
| DOI: | 10.1080/02701367.2009.10599530 |
| Schlagworte: | |
| Online Zugang: | |
| Erfassungsnummer: | PU200911005782 |
| Quelle: | BISp |
Abstract des Autors
The authors evaluated whether ultraendurance swimmers suffer a change of body mass, fat mass, skeletal muscle mass, total body water, and specific gravity of urine during a 12-hr swim in 12 male Caucasian ultraswimmers. Proton nuclear magnetic resonance of urine samples before and after the race was performed to detect alanine, lactate, and 3-hydroxybutyrate. The 12 swimmers achieved an average distance of 29.4 km (SD=5.1). No statistically significant changes in body mass, fat mass, skeletal muscle mass, and total body water could be determined (p>.05), but urine gravity decreased significantly (p<.001). Two participants showed increased signals of ketone bodies after the race. In these samples, the hydroxybutyrate-creatinine ratio increased more than tenfold. Verf.-Referat (geändert)