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首页> 外文期刊>Journal of applied physiology >Supplementation with nitrate and nitrite salts in exercise: a word of caution.
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Supplementation with nitrate and nitrite salts in exercise: a word of caution.

机译：在运动中补充硝酸盐和亚硝酸盐：警告。

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摘要

Recent studies show that dietary supplementation with inorganic nitrate (NO J) reduces whole body oxygen cost during physical exercise, an effect that might be used by endurance athletes in an attempt to increase stamina (1-3, 6, 7, 9-11). In the cited exercise studies, nitrate was taken in the form of a salt (e.g., sodium nitrate) or from a food source such as beetroot juice, which naturally contains high amounts of nitrate. Although the true performance-enhancing effects of nitrate are yet to be proven under actual competitive conditions, it is clear from internet forums, articles, and discussions within the sports community that the use of nitrate supplementation currently is spreading rapidly among athletes. Bioacti-vation of nitrate involves its initial metabolism to form the more reactive nitrite anion (NO^), which may be further reduced to nitric oxide (NO) and other bioactive nitrogen species. Importantly, the dose of nitrate that reduces oxygen cost efficiently is in the range 300-500 mg and there is no evidence that higher doses would increase the effects further.
机译：最近的研究表明，饮食中添加无机硝酸盐（NO J）可以减少体育锻炼时的全身氧气消耗，耐力运动员可能会尝试使用这种效果来增加耐力（1-3、6、7、9-11） 。在引用的运动研究中，硝酸盐以盐（例如硝酸钠）的形式或从自然含有大量硝酸盐的食物来源（如甜菜根汁）中获取。尽管在实际比赛条件下仍可证明硝酸盐的真正性能增强作用，但从体育界的互联网论坛，文章和讨论中可以清楚地看到，目前硝酸盐补充剂的使用正在运动员中迅速传播。硝酸盐的生物活化涉及其初始代谢以形成更具反应性的亚硝酸根阴离子（NO 2），其可以进一步还原为一氧化氮（NO）和其他生物活性氮物质。重要的是，能有效降低氧气成本的硝酸盐剂量在300-500 mg范围内，没有证据表明更高的剂量会进一步增加效果。

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