Chromium, magnesium, zinc, and selenium are essential minerals for humans. They all are involved in a number of metabolic reactions in the body; many of these reactions are involved in energy metabolism, and hence it is thought that they may exert an ergogenic effect. However, the data on their effects as ergogenic aids have been equivocal. Longitudinal research is required (including supplementation studies) to follow athletes over time and properly evaluate effects of these minerals upon performance. The purpose of this review is to evaluate the ergogenic effects of chromium, magnesium, zinc, and selenium.
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