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The goal of this field study was to assess antioxidant status and markers of oxidative damage in elite alpine ski racers during routine training. Subjects included 12 members of the U.S. Men’s Alpine Ski Team attending a 10-day summer training camp. Blood draws were collected at rest and after exercise: (a) prior to training, (b) following 2 days of dry land training, and (c) after 4 days of on-snow skiing. Seven measures of antioxidant status were determined using colorimetric and HPLC methods (Trolox “equivalent antioxidant capacity, uric acid, α-tocopherol, β-tocopherol, total glutathione, cytosolic glutathione peroxidase, and superoxide dismutase). Oxidative stress was assessed using 2 markers of lipid peroxidation (malondialdehyde and lipid hydroperoxides) and 2 markers of protein oxidation (carbonylated total proteins and carbonylated hemoglobin). The results of this study suggest that antioxidant status of elite alpine skiers may decline over a period of intense training. However, elevations in markers of oxidative stress were not evident.
A.W. Subudhi is with the Orthopedic Specialty Hospital, 5848 S. Fashion Blvd., Salt Lake City, Utah 84107. S.L. Davis is with the Department of Exercise and Sport Science at the University of Utah, Salt Lake City, Utah 84112. R.W. Kipp is with the United States Ski Association, Park City, Utah 84060. E.W. Askew is with the Division of Foods and Nutrition, at the University of Utah, Salt Lake City, Utah 84112.