Abstract
Intensive muscular exercise promotes the production of reactive oxygen species (ROS)
in the working muscles and can impair athletic performance, particularly in conjunction
with inadequate recovery. Mammals are protected against oxygen toxicity by a system
of ROS scavengers composed of enzymatic and non-enzymatic components. Although antioxidant
supplementation has recently been considered as a means to diminish or prevent damage
from ROS, the specific antioxidant requirements of athletes are not known. Since thyroid
function is essential for athletic performance, thyroid control should be undertaken
in cases where there is any sign of thyroid dysfunction ”of unknown etiology”. Hyperthyroidism
and hypothyroidism have been associated with increased production of ROS as well as
related inflammatory response and myopathy. There is evidence that antioxidant supplementation
combined with antithyroid treatment with methimazole could be useful in decreasing
the oxidative stress.
Key words
Oxidative stress · Antioxidants · Sports · Thyroid function
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Prof. L. H. Duntas
Endocrine Unit, Evgenidion Hospital, University of Athens
20 Papadiamantopoulou St. · 11528 Athens · Greece
Telefon: +30 (210) 674 88 78
eMail: ledunt@otenet.gr