An ultra-cycling race leads to no decrease in skeletal muscle mass
Deutscher übersetzter Titel: | Ein Ultra-Radrennen führt zu keiner Abnahme von Muskelmasse |
---|---|
Autor: | Knechtle, B.; Wirth, A.; Knechtle, P.; Rosemann, T. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 30 (2009), 3, S. 163-167, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-0028-1104585 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU200904002113 |
Quelle: | BISp |
Abstract
Ultra-endurance races lead to an enormous energy deficit, and a decrease in body mass in the form of fat mass as well as skeletal muscle mass can be found. The decrease in skeletal muscle mass has been demonstrated in ultra-runners. We investigated therefore, in an ultra-cycling race, whether ultra-cyclists also suffered a decrease in body mass and whether we could find changes in skeletal muscle mass and/or fat mass. The anthropometric method was used to determine body mass, skeletal muscle mass and fat mass in 28 male Caucasian, non-professional, ultra-cyclists before and after a 600 km ultra-cycling race. In order to quantify hydration status, we measured total body water, haematocrit, plasma sodium and urinary specific gravity. In addition, plasma urea was determined as a marker of protein catabolism. Body mass as well as fat mass decreased highly significantly (p<0.01) whereas skeletal muscle mass did not change (p>0.05). The post race minus pre race difference (Δ) in body mass was associated with Δ fat mass (p<0.05). Urea increased highly significantly (p<0.01); however Δ urea was not associated with Δ skeletal muscle mass. We concluded that ultra-cycling in contrast to ultra-running leads to no reduction in skeletal muscle mass. Verf.-Referat