Decrease in respiratory quotient during exercise following L-carnitine supplementation
Deutscher übersetzter Titel: | Verkleinerung des respiratorischen Quotienten unter koerperlicher Belastung nach L-Karnitin-Supplementierung |
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Autor: | Gorostiaga, E.M.; Maurer, C.A.; Eclache, J.P. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 10 (1989), 3, S. 169-174, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-2007-1024895 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199205052794 |
Quelle: | BISp |
Abstract
This study was undertaken to determine the effects of L-carnitine addition to the diet during submaximal exercise in endurance-trained humans. Ten subjects (VO2max:62 ml/kg/min) performed a control test (C) (45 min of cycling at 66 of VO2max) followed by 60 min of recovery in a sitting position. Each subject repeated this trial after 28 days of placebo (P) and L-carnitine (L-C) treatment (double-blinded cross-over design). The dose of each treatment was 2 g/day. There were no differences between the C and P tests. The respiratory quotient was lower (p<0.05) with treatment than with P or C during exercise. In addition, oxygen uptake, heart rate, blood glycerol, and resting plasma free fatty acid concentrations presented a nonsignificant trend toward higher values in L-C than in the C or P groups. These observations suggest an increased lipid utilization by muscle during exercise in the L-C-treated group. This effect has further possibilities for improving performance during submaximal exercise. Verf.-Referat