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首页> 美国卫生研究院文献>Sports >Nutritional Practice and Nitrogen Balance in Elite Japanese Swimmers during a Training Camp
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Nutritional Practice and Nitrogen Balance in Elite Japanese Swimmers during a Training Camp

机译：培训营日间精英日本游泳运动员营养实践与氮气平衡

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The protein requirement in athletes increases as a result of exercise-induced changes in protein metabolism. In addition, the frequency, quantity, and quality (i.e., leucine content) of the protein intake modulates the protein metabolism. Thus, this study aimed to investigate whether nutritional practice (particularly, protein and amino acid intake at each eating occasion) meets the protein needs required to achieve zero nitrogen balance in elite swimmers during a training camp. Eight elite swimmers (age 21.9 ± 2.3 years, body weight 64.2 ± 7.1 kg, sex M:2 F:6) participated in a four-day study. The nitrogen balance was calculated from the dietary nitrogen intake and urinary nitrogen excretion. The amino acid intake was divided over six eating occasions. The nitrogen balance was found to be positive (6.7 ± 3.1 g N/day, p < 0.05) with protein intake of 2.96 ± 0.74 g/kg/day. The frequency and quantity of leucine and the protein intake were met within the recommended range established by the International Society of Sports Nutrition. Thus, a protein intake of 2.96 g/kg/day with a well-designated pattern (i.e., frequency throughout the day, as well as quantity and quality) of protein and amino acid intake may satisfy the increased need for protein in an elite swimmer.
机译：运动员中的蛋白质要求随着运动诱导的蛋白质代谢变化而增加。此外，蛋白质摄入的频率，数量和质量（即亮氨酸含量）调节蛋白质代谢。因此，本研究旨在调查营养实践（特别是每次进食的蛋白质和氨基酸摄入量）是否满足培训营地在精英游泳者中实现零氮平衡所需的蛋白质所需。八个精英游泳运动员（年龄21.9±2.3岁，体重64.2±7.1千克，性别M：2 F：6）参加了为期四天的研究。根据膳食氮气摄入和尿氮排泄来计算氮气平衡。氨基酸摄入量分为六次进食场合。发现氮气平衡为阳性（6.7±3.1g /天，p <0.05），蛋白质摄入为2.96±0.74g / kg /天。在国际体育营养学会建立的推荐范围内满足了亮氨酸和蛋白质摄入量的频率和量。因此，具有2.96g / kg /天的蛋白质摄入蛋白质和氨基酸摄入的良好指定的图案（即，整天频率，数量和质量）可以满足精英游泳者在精英游泳者中增加对蛋白质的需求。

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