期刊名称：Journal of Nutritional Science and Vitaminology
印刷版ISSN：0301-4800
电子版ISSN：1881-7742
出版年度：1997
卷号：43
期号：1
页码：59-71
DOI：10.3177/jnsv.43.59
出版社：Center for Academic Publications Japan
摘要：The sufficiency of the dietary protein allowances recom-mended by the Ministry of Health and Welfare of Japan for various physical exercises has not been examined. We investigated the protein requirement for moderate-intensity physical exercise using nitrogen bal-ance in the isoenergetic state. Seventeen healthy college students exer-cised for 10 days with an adaptation period of three days and non-exercise control period of 10 days. They were given a maintenance level of energy and 1.08g/kg per day of high quality mixed proteins recommended by the Ministry of Health and Welfare of Japan throughout the experimental period. They performed treadmill running during the exercise period at about 65% of VO2max for 25, 41 or 48min/day, which required 200, 300 or 400 kcal of extra energy, respectively. Although the exercise increased dermal nitrogen loss, urinary nitrogen excretion tended to decrease. Consequently, the exercise ranging from 200 to 400 kcal/day did not significantly alter the nitrogen balance. Thiobarbituric acid-reactive substances and glutathione disulfide were not increased after exercise, suggesting that the moderate exercise, recommended for health promo-tion by the Ministry of Health and Welfare of Japan, does not cause oxidative damage to healthy subjects. These findings demonstrate that a protein intake of 1.08g/kg per day is enough for moderate exercise.
关键词：Key Words moderate exercise;protein allowance;dermal nitrogen loss;nitrogen balance
