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The daily concentrations of trace elements in the diet were similar at the start and the end of the training period without differences between groups. In serum, significant differences between groups were observed in As, Cd and Pb (p 0.05). Attending to time effects, a significant difference was obtained in Pb (p 0.05). In urine, significant differences between groups were obtained in all minerals (p 0.05). According to training period, significant differences were observed in As, Be and Pb (p 0.0