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Mean values ± standard deviation (±SD) of serum reactive oxygen metabolites (dROMs), thiol antioxidant barrier (SHp), antioxidant barrier (Oxy-ads) and homocysteine (Hcy) measured 1 week prior to the race (1WB), the day of the race at rest (TREST), immediately after the race (TPOST), and after 30 (TPOST30) and 120 min (TPOST120) in Thoroughbred racehorses belonging to Group 1 (1200 m race), Group 2 (1600 m race) and Group 3 (2000 m race).
