Home Current Issue Previous Issues Published Ahead-of-Print Collections For Authors Journal Info
Skip Navigation LinksHome > July 2010 - Volume 42 - Issue 7 > Antioxidant Supplementation Does Not Alter Endurance Trainin...
Medicine & Science in Sports & Exercise:
doi: 10.1249/MSS.0b013e3181cd76be
Applied Sciences

Antioxidant Supplementation Does Not Alter Endurance Training Adaptation

YFANTI, CHRISTINA1; ÅKERSTRÖM, THORBJÖRN1; NIELSEN, SØREN1; NIELSEN, ANDERS R.1; MOUNIER, REMI2,3; MORTENSEN, OLE H.4; LYKKESFELDT, JENS5; ROSE, ADAM J.6; FISCHER, CHRISTIAN P.1; PEDERSEN, BENTE K.1

Collapse Box

Abstract

Background: There is a considerable commercial market, especially within the sports community, claiming the need for antioxidant supplementation. One argument for antioxidant supplementation in sports is that physical exercise is associated with increased reactive oxygen and nitrogen species (RONS) production, which may cause cell damage. However, RONS production may also activate redox-sensitive signaling pathways and transcription factors, which subsequently, may promote training adaptation.

Purpose: Our aim was to investigate the effects of combined vitamin C and E supplementation to healthy individuals on different measures of exercise performance after endurance training.

Methods: Using a double-blinded placebo-controlled design, moderately trained young men received either oral supplementation with vitamins C and E (n = 11) or placebo (n = 10) before and during 12 wk of supervised, strenuous bicycle exercise training of a frequency of 5 d·wk−1. Muscle biopsies were obtained before and after training.

Results: After the training period, maximal oxygen consumption, maximal power output, and workload at lactate threshold increased markedly (P < 0.01) in both groups. Also, glycogen concentration, citrate synthase, and β-hydroxyacyl-CoA dehydrogenase activity in the muscle were significantly higher in response to training (P < 0.01) in both groups. However, there were no differences between the two groups concerning any of the physiological and metabolic variables measured.

Conclusions: Our results suggest that administration of vitamins C and E to individuals with no previous vitamin deficiencies has no effect on physical adaptations to strenuous endurance training.

©2010The American College of Sports Medicine

Login

Article Tools

Share

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.

Connect With Us