【作者】 李继斌； 黎海茂； 王松艳；

【Author】 LI Ji-bin, et al.Department of nutriology and food hygiene, Chongqing University of Medical Sciences,(Chongqing , 400016,China)

【机构】 重庆医科大学预防医学系； 重庆医科大学儿童医院儿童保健教研室；

【摘要】 为研究补充钙剂对青少年骨矿含量以及体格发育的影响,本研究选取161例9-20岁健康青少年,按性别和性发育程度分为补钙组和对照组。实验前后评价两组膳食钙摄入量、运动量水平、性发育程度,并测定两组青少年身高、体重和桡骨远端1/3处骨矿含量、骨宽和血清总碱性磷酸酶水平。结果表明本组青少年膳食钙摄入量低于每日膳食钙参考摄入量的适宜摄入量水平,补充钙剂对青少年身高、体重无明显影响:骨矿含量增长除女性青春期后期有显著性差异外,其余各组增长与对照组比较无显著性。该结果提示,青春期存在体格快速发育和骨量迅速积累的特点,补充钙剂对骨矿含量的增长作用有限,对体格发育也无明显影响;在女性骨量增长较少阶段补充钙剂则可能有助于骨矿含量的增加,且这种作用可能通过降低骨代谢率实现。更多还原

【Abstract】 This trial was conducted to evaluate the dffects of calcium on bone mineral accretion in adolescents. 161healthy adolescents 9-20 years old were recruited and randomly divided into experiment and control group. The formal received 300mg Ca every day. The dietary calcium, physical activity, SMR, distal one-third radial bone mineral content (BMC).bone width(BW), height, weight and serum total ALP were measured at the beginning and at the end of the trial. It was found that the average of calcium intake from dietary sources was 5()0mg/d in both groups. Increasing daily calcium intake via calcium supplementation in adolescents resulted in moderate increases of BMC, and there was a significantly increased BMC in the females during the late adolescence. No significant differences of anthropometric variables were observed between the two groups at the end of the study, while the increase of the levels of serum ALP in the females of experiment group was significantly lower than that in the control group during the late adolescence. It is concluded that during the pubertal years when the BMC accretion is evident, there were no significant differences in bone mass accrual between the two groups. While in the females, calcium supplementation may help to enhance the bone mineral accrual during late adolescence when the BMC accretion was remarkable reduced.更多还原