If you live in a high - pollution area or near a nuclear power plant, you certainly should consider
taking additional antioxidant supplements as a daily measure of prevention.
So it's possible that fit subjects already have reasonably effective natural antioxidant defenses in place, so
taking additional antioxidant supplements doesn't make as much (or any) difference.
However, based on available data, it is feasible to suggest that these requirements, particularly for vitamins C and E, might be in a range of ≥ 100 — 200 % of the current recommendations for the general population...
Additional research is warranted to define
antioxidant requirements during exercise training, which should also
take into account nutrigenomic issues.