Magnesium status and the physical performance of volleyball players: effects of magnesium supplementation

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Citações na Scopus
18
Tipo de produção
article
Data de publicação
2014
Título da Revista
ISSN da Revista
Título do Volume
Editora
TAYLOR & FRANCIS LTD
Autores
SETARO, Luciana
NAKANO, Eduardo Yoshio
SALES, Cristiane Hermes
NUNES, Newton
COLLI, Celia
Citação
JOURNAL OF SPORTS SCIENCES, v.32, n.5, p.438-445, 2014
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
The aim of this study was to test the hypothesis that magnesium supplementation influences the physical performance of volleyball players, as the efficacy of this approach remains questionable. Twenty-five professional male volleyball players were assigned randomly to experimental (350mg Mg center dot d(-1), 4 weeks) and control groups (500mg maltodextrin center dot d(-1), 4 weeks) maintaining inter-group homogeneity of urinary magnesium. Erythrocyte, plasma and urinary magnesium levels, plasma creatine kinase activity, lactate production, maximal oxygen uptake (VO2 max) and plyometric (squat jump, countermovement jump, countermovement jump with arm swing) and isokinetic (peak torque, potency and total work) performances were evaluated before (T-0) and after (T-1) supplementation. Levels of erythrocyte and urinary magnesium and creatine kinase activity and VO2 max remained within normal ranges in both groups. Plasma magnesium decreased significantly only within the experimental group. Significant decreases in lactate production and significant increases (of up to 3cm) in countermovement jump and countermovement jump with arm swing values were detected in the experimental group following magnesium supplementation, but not in the control group at T-1. It is concluded that magnesium supplementation improved alactic anaerobic metabolism, even though the players were not magnesium-deficient.
Palavras-chave
vertical jump, athletes, magnesium supplementation, physical performance, volleyball
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