【摘要】 本文为了解儿童青少年运动员的锌营养状况并从中探讨其日供给量,以北京市业余体校的156名8—16岁的儿童青少年运动员为对象(男75、女81人),进行了(1)膳食锌摄入量(采用膳食锌实测法和食物称重—食物成分表计算法)、血清锌和发锌水平检测;(2)运动员在运动与不运动情况下锌平衡状态的测定;(3)运动员在补充不同量锌强化食品三个月前后的血清和发锌水平变化等研究。初步提出儿童青少年运动员膳食锌的日供给量应比一般不运动的儿童青少年高;6—10岁者为15—20mg/d,10—18岁者为20—25mg/d。更多还原

【Abstract】 In order to approach the recommended dietary allowance (RDA) of zinc forchildren and adolescent athletes, a series of studies were carried out on 156athletes training at Beijing Amateur Sports School from 1989 to 1991. The main results were as follows: 1. As average zinc dietary intakes of athletes was 14-18mg/d for the majority,serum zinc levels of 4.5% and 25.0% of the athletes investigated were<70μg/dLand <90μg/dL respectively; and hair zinc levels of 16.7% and 25% of theathletes investigated were <110 ppm and <120ppm respectively. 2. Zinc balance of athletes undergoing vigrous training was in negativestate and it was in positive state as athletes were in resting state. 3. Low serum and hair zinc levels were corrected after three month’s 8mg/d zinc supplementation. There has been no significant difference in serumand hair zinc levels of athletes with 8mg/d or 16mg/d zinc supplementation. 4. RDA of zinc has been suggested to be 15-20 mg/d for 6-10 year-oldathletes, and 20-25 mg/d for 10-18 year-old athletes.更多还原