How are Magnesium and Sport related?

The relationship between magnesium and sport is physiologically well-founded, but the provided contexts contain no direct evidence on this topic. Magnesium is an essential mineral involved in over 300 enzymatic reactions, including muscle contraction, nerve transmission, energy metabolism (ATP production), and protein synthesis. During exercise, magnesium requirements may increase due to sweat losses and higher turnover. Deficiency can contribute to muscle cramps, fatigue, and impaired performance. Studies suggest adequate magnesium intake supports recovery and may attenuate oxidative stress. However, evidence for ergogenic effects in well-nourished athletes is weak. The given contexts discuss DNA variants (BDNF, MTOR, ACE, FOXO3) and their weak associations with sport or metabolism, not magnesium. Therefore, this answer is based on general physiological knowledge, not the provided sources. Caution against exaggerated marketing: magnesium supplements are only beneficial if deficiency is confirmed. A blood test (serum magnesium) is more reliable than DNA tests. Evidence: mechanistic, not from context.