Exercise-induced oxidative stress before and after vitamin C supplementation
Deutscher übersetzter Titel: | Belastungsbedingter oxidativer Stress vor und nach Vitamin C-Gaben |
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Autor: | Alessio, H.M.; Goldfarb, A.H.; Cao, G. |
Erschienen in: | International journal of sport nutrition and exercise metabolism |
Veröffentlicht: | 7 (1997), 1, S. 1-9, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1050-1606, 1543-2742 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199704204375 |
Quelle: | BISp |
Abstract des Autors
Vitamin C (ascorbic acid) was supplemented (1 g/day) for 1 day and 2 weeks in the same subjects. Plasma thiobarbituric acid reacting substances (TBARS) and oxygen radical absorbance capacity (ORAC) before and after 30 min submaximal exercise were measured. Different vitamin C supplementations did not affect resting TBARS or ORAC. Following 30 min exercise, values for TBARS were 12.6 and 33% above rest with 1 day and 2 weeks of vitamin C supplementations, respectively, compared to 46% higher with placebo. ORAC did not significantly change (11%) after exercise with a placebo, nor when subjects were given vitamin C supplements for 1 day or 2 weeks (4.9% and 5.73%, respectively). TBARS:ORAC, a ratio representing oxidative stress, increased 32% with placebo compared to 5.8 and 25.8% with vitamin C supplements for 1 day and 2 weeks, respectively. It was concluded that exercise-induced oxidative stress was highest when subjects did not supplement with vitamin C compared to either 1 day or 2 weeks of vitamin C supplementation. Verf.-Referat