Status avaliation in magnesium, iron, zinc, and copper in female water polo athletes of the pre-competitive,detrain, and maintenance periods / Avaliação do estado nutricional em magnésio, ferro, zinco e cobre de atletas de polo aquático feminino em períodos de treinamento pré-competitivo, de destreinamento e de treinamento de manutenção

AUTOR(ES)

Fátima Aparecida Arantes Sardinha

DATA DE PUBLICAÇÃO

2002

RESUMO

The study evaluated the effect of training on the magnesium, iron, zinc, and copper nutritional status, in female water polo athletes of the Brazilian national team, considering the concentrations of ErMg2+ and SMg2+; ErZn2+ and SZn2+; Cu/Zn-SOD activity and SCu2+; Hb, FER and %TS in pre-competitive, detraining, and maintenance periods. The intakes of these minerals were also evaluated, considering the new DRIs, which were associated to the biochemical parameters of the pre-competitive, and compared to a control group. Athletes presented a magnesium intake with greater probability of not being adequate and the SMg2+ concentration showed a tendency to lower values, compared to controls. The dietary Zn2+ intake was greater for athletes (p<0.05); however, their mean ErZn2+ concentration was lower (p<0.05). The iron intake was not different between the two studied groups; however, the iron nutrition status was significantly better in athletes. Both groups presented adequate copper nutritional status. The Cu/Zn-SOD activity was greater for athletes (p<0.05) and the SCu2+, with no difference between groups, was the parameter, which was better associated to the dietary intake. The pre-competitive training altered copper and iron nutritional status significantly (p<0.05). Possibly, the intense training promoted the compartmental redistribution of Zn2+ as from the erythrocyte. The training did not alter the Mg2+ nutritional status; however, homeostatic physiologic mechanisms may have occurred, nevertheless not avoiding the occurrence of cramps after intense training. ErZn2+ was recovered in the detraining.

ASSUNTO(S)

esporte minerais sports minerals avaliação nutricional nutritional avaliation human physiology fisiologia humana nutrição nutrition

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