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Antioxidant Supplementation and Tapering Exercise Improve Exercise-Induced Antioxidant Response

Laboratoire de Physiologie Cellulaire et Moléculaire des Systèmes Intégrés, CNRS UMR 6548 (I.M.)
Laboratoire de Physiologie des Adaptations et de la Performance Motrice, Faculté des Sciences du Sport (S.P.)
Université de Nice Sophia-Antipolis, Laboratoire de Biologie du Stress Oxydant (A.-S.R.)
Laboratoire LBSO/LCR7 N° 8 (M.-J.R.)
Université Joseph Fourier, Jean-Pierre Ebel CNRS-CEA, Institut de Biologie Structurale (A.F.), Grenoble, FRANCE

View larger version (43K): [in a new window]   Fig. 1. Total weekly training load in supplemented (Su, n = 7) and placebo (Pla, n = 9) triathletes during normal training, overloaded training (OT) and taper training (TT). Total weekly training load is expressed in arbitrary units (AU). W1: week number 1 in training program.

View larger version (23K): [in a new window]   Fig. 2. Daily mean food and supplement vitamin A, C, and E and selenium (Se) intakes relative to the French Recommended Dietary Allowance (FRDA) in supplemented (Su, n = 7) and placebo (Pla, n = 9) triathletes during TT. *p < 0.05 relative to Pla group. p < 0.05 relative to FRDA.

View larger version (46K): [in a new window]   Fig. 3. Variations in plasma total antioxidant status (TAS) before and after TT in pre- and post-exercise conditions in supplemented (Su, n = 7) and placebo (Pla, n = 9) triathletes. p < 0.05 relative to interaction effect between Treatment, TT and Exercise.

View larger version (16K): [in a new window]   Fig. 4. Variations in blood reduced (GSH) and oxidized (GSSG) glutathione concentration before and after TT in pre- and post-exercise conditions in supplemented (Su, n = 7) and placebo (Pla, n = 9) triathletes. p < 0.05 relative to interaction effect between TT and Exercise.