Dietary Nitrate: the New Magic Bullet?
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چکیده
KEY POINTS • Nitric oxide (NO) is vitally important in human physiology and it modulates many of the processes that are essential to exercise performance. • Recent evidence indicates that NO availability can be enhanced by dietary supplementation with inorganic nitrate which is abundant in green leafy vegetables and beetroot. • Dietary nitrate supplementation with 5-7 mmol nitrate (~0.1 mmol/kg body mass) reduces resting blood pressure, lowers the oxygen cost of sub-maximal exercise (i.e., enhances muscle efficiency) and may enhance exercise performance. • These physiological effects can be observed as little as 3 h following nitrate consumption and can be maintained for at least 15 days if supplementation is continued. • The optimal nitrate ‘loading’ regimen and the physical activities and populations in which nitrate supplementation might be most effective remain to be determined. • Due to possible health risks associated with the consumption of nitrate salts, it is recommended that athletes wishing to explore the ergogenic potential of nitrate supplementation do so through increased consumption of nitrate-rich vegetable products such as beetroot juice.
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