石家庄学院学报

分别采用韩国Osteopro超声骨密度仪和Inbody230体成分测试仪对312名小学生进行骨密度和体成分测试,同时采用自制问卷对研究对象近一年来奶制品摄入情况和日常运动情况进行调查.结果发现:男生的骨密度与体重、去脂体重、身高体重指数(BMI)值均呈正相关,与体脂肪率呈负相关,但均无统计学意义(P>0.05);女生的骨密度与体重、去脂体重、体脂肪率、BMI值均呈正相关,其中与体重、去脂体重、BMI值的相关性有统计学意义(P<0.01);男女生的骨密度与奶制品摄入频率和运动频率相关关系呈现一致性,每周吃4⁶次奶制品的学生骨密度最大,其次是每天都吃的学生,不吃奶制品的学生骨密度最小,运动次数越多,学生的骨密度越大,不运动的学生骨密度最小.研究表明,多参加体育运动和适度摄入(每周4⁶次)奶制品可以有效提高小学生的骨密度.

Body composition are measured by Body Composition Test Instrument(Inbody230, Korea) and the bone density are measured by Sahara Clinical Bone Sonometer Test Instrument(Osteopro, Korea) on 312 primary school students. At the same time milk and dairy products intake and daily activities are investigated by self-made questionnaire during one year. The results showed that bone density and body weight, lean body mass, BMI values in boys are positively correlated, negatively correlated with body fat percentage, but had no statistical significance(P>0.05); all the data in girls are positively correlated, a statistically significant correlation among weight, lean body mass and BMI value(P<0.01); the relationship between bone density and milk and dairy products intake frequency with exercise frequency showed consistency, bone density of students who take milk 4-6 times per week appears the maximum, followed by the students who eat every day, and the minimum appeared in students with no diary food;then the more times students do exercise, the bigger bone mineral density is. The bone mineral density of students with no exercise is minimum. It suggests that more physical exercise and moderate intake(4-6 times a week) of milk and dairy products can effectively improve bone mineral density of primary school students.