Efeito da suplementação com magnésio no desempenho físico em atletas de voleibol profissional / Effect of magnesium supplementation in performance in elite volleyball players

AUTOR(ES)

Luciana Setaro

DATA DE PUBLICAÇÃO

2009

RESUMO

The aim of this study was to evaluate the effect of magnesium supplementation in physical performance of male volleyball players (n = 25). The athletes with respectively, 17.42 ± 1.5 years and 17.85 ± 1.0 years, were randomly assigned to an experimental (n = 12) and a control group (n = 13) in a double-blind 4-week supplementation protocol: the supplemented group received 350 mg Mg/d (2 capsules of 250 mg MgO/d) and the control 350 mg/d of maltodextrin. The analyses were performed before and after the supplementation. The Mg intake was evaluated through six-day food records with the NutriQuanti software. Blood and 24h urine samples were obtained CK and urine, plasma and erythrocyte Mg determination. MaxVO2, lactate, vertical jump-squat jump (SJ), counter movement jump (CMJ), counter movement jump arm (CMJA), and isokinetic dynamometry of knee`s extensor and flexor muscles were determined for the evaluation of physical performance. All athletes (n = 25) had inadequate dietary magnesium intake according to the Dietary Reference Intakes (DRI). On the other hand the biochemical parameters of Mg status were not different between the groups. At t = 4 weeks the Mg-supplemented group, but not the control, showed lower plasma concentration when compared to values at t = 0, and CMJ and CMJA heights as well. When the supplemented and the control groups were compared at t = 4 weeks, the CMJA height of the supplemented group was higher than that from the control (p = 0.03). These results show an increase of the athletes performance with Mg supplementation in the conditions of this study.

ASSUNTO(S)

magnesium desempenho esportivo estudo nutricional (avaliação) ingestão dieta para esportistas intake magnésio vôlei volleyball atletas performance minerais na dieta (fisiologia) aathletes

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