Fluid restriction during running increases GI permeability
Deutscher übersetzter Titel: | Flüssigkeitsbeschränkung während des Laufens erhöht die gastrointestinale Durchlässigkeit |
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Autor: | Lambert, G.P.; Lang, J.; Bull, A.; Pfeifer, P.C.; Eckerson, J.; Moore, G.; Lanspa, S.; O'Brien, J. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 29 (2008), 3, S. 194-198, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-2007-965163 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU200809002803 |
Quelle: | BISp |
Abstract
The purpose of this study was to determine gastrointestinal (GI) permeability during prolonged treadmill running (60 min at 70% VO2max) with and without fluid intake (3 ml/kg body mass/10 min). Twenty runners (11 males, 9 females; age = 22 ± 3 (SD) yrs; mean VO2max = 55.7 ± 5.0 ml/kg/min) completed four experiments: 1) rest, 2) running with no fluid (NF), 3) running with ingestion of a 4% glucose solution (GLU), and 4) running with ingestion of a water placebo (PLA). To determine GI permeability, subjects also drank a solution containing 5 g sucrose (S), 5g lactulose (L), and 2g rhamnose (R) immediately prior to each trial. Gastroduodenal permeability was determined by urinary S excretion, while small intestinal permeability was determined by the L/R excretion ratio. Percent body mass loss (i.e., dehydration) was negligible during rest, GLU and PLA, while NF resulted in a 1.5% loss of body mass (p<0.05). Gastroduodenal and intestinal permeability were significantly (p<0.008) increased in NF compared to rest. There were no other differences in GI permeability. These results indicate that fluid restriction during 1 h of steady-state running increases GI permeability above resting levels. Verf.-Referat