运动和营养对青年女子骨密度影响研究

Study of the Influence Factors in Young Female's Bone Mineral Density

目的:研究大学一年级女生骨密度状况,分析影响青年女性峰值骨密度(BMD)的因素。方法:应用DEXA测定84名大学一年级女生骨密度和体成分,通过问卷调查了解受试对象每日牛奶摄入情况。结果:研究对象中普通组和运动组的BMI分别为(19.2±2.4)kg/m2和(19.8±2.3)kg/m2;瘦体重(38.4±3.6)kg和(39.7±4.5)kg;体脂百分比(26.2±3.3)%和(25.4±2.7)%;运动组的瘦体重、体脂百分比以及各部位骨密度与普通组之间均呈显著性差异(P<0.05)。各组受试对象腰椎、髋部骨密度与体重、BMI、瘦体重和体脂百分比均呈正相关(P<0.01),牛奶摄入量≥250mL/d者骨密度高于不足250mL/d者,但无显著差异(P>0.05)。结论:运动、体重、BMI和体脂百分比是骨密度的主要影响因素,单纯牛奶摄入对于骨密度的影响不明显。

Objective：The purpose of this study was to investigate the influence factors in female college students＇ bone mineral density（BMD）. Methods：84 female students were adopted as the objects. Each subject＇s lumbar and total hip BMD were measured by DEXA. Milk intake and physical exercise time were inquired by questionaire. Results： BMI of ordinary group and the exercise group were（19.2±2.4） kg/m2 and （19.8 ± 2.3） kg/m2 ;Bodyweight of two group were （38.4±3. 6） kg and （39.7±4.5） kg;body fat percentage of two group were （26.2±3.3）% and （25.4±2.7）0//oo. （1）BMD and body mass index （BMI） in the students doing exercise were higher than those of non-exercise （ P d0.05）. （2） Bodyweight,BMI and body fat percentage were signifi-cantly positive correlation with BMD（ P d0.01）. （3）The BMD of objects whose milk intake was more than 250 mL per day were higher than those of less than 250 mL per day（ P 〉0.05） ,but not obvious. Con- clusion： Exereise,bodyweight,BMI and body fat percentage were the main influence factors of BMD. The influence of milk intake on BMD was not significant.