Meal frequency of pre-exercise carbohydrate feedings
Deutscher übersetzter Titel: | Untersuchung der Häufigkeit der Kohlenhydrataufnahme vor körperlichem Training |
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Autor: | Chryssanthopoulos, C.; Petridou, A.; Maridaki, M.; Mougios, Vassilis |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 29 (2008), 4, S. 336-342, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-2007-965340 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU200809002826 |
Quelle: | BISp |
Abstract
This study compared the effect of single and multiple carbohydrate feedings before exercise on biochemical and physiological responses during exercise. Eight males performed 3 runs for 1 h at 70% VO2max after consuming a meal containing 2.5 g carbohydrate per kg body mass in a single dose 3 h before exercise (SF), the same meal in 5 equal doses at 3, 2.5, 2, 1.5, and 1 h before exercise (MF), or a liquid placebo 3 h before exercise (P). RER and carbohydrate oxidation rates were higher in SF and MF compared to P trials, but there was no difference between SF and MF trials. Pre-exercise insulin was 2.0- and 3.4-fold higher in SF and MF, respectively, compared to P, and 1.7-fold higher in MF compared to SF. Glycerol and NEFA were higher in P compared to SF and MF trials before and at the end of exercise. In conclusion, a carbohydrate meal containing 2.5 g/kg ingested in doses over 3 h before running produced higher hyperinsulinemia pre-exercise than that produced when the meal was consumed in a single dose. Nevertheless, estimated carbohydrate utilization and adipose tissue lipolysis during exercise after multiple feedings seemed to be as high as after a single feeding. Verf.-Referat