不同发育程度儿童身体成分变化特征及评价体脂率方法的研究  

Changing Characteristics of Children's Body Composition for Different Degrees of Development and the Evaluation Methods of Percent Body Fat

作　　者：冯宁[1,2] 张一民[3] 孔振兴[3] 于晶晶[3] 

机构地区：[1]沈阳体育学院运动人体科学学院,辽宁沈阳110102 [2]北京体育大学运动人体科学学院,北京100084 [3]北京体育大学教学实验中心,北京100084

出　　处：《沈阳体育学院学报》2013年第4期75-78,共4页Journal of Shenyang Sport University

基　　金："十一五"国家科技支撑计划课题(2006BAK33B01);"十二五"国家科技支撑计划课题(2012BAK21B01)

摘　　要：目的:对骨龄在6~12岁的儿童分别使用双能X线吸收法(DEXA)和生物电阻抗法(BIA)对身体成分进行测试,分析儿童身体成分指标的特征与变化规律,研究两种方法的相互关系,以DEXA为标准检验BIA与DEXA的相关性和一致性。方法:选取235名骨龄从6~12岁健康儿童(男童,n=127;女童,n=108),分别测试和计算身高、体重、身体体重指数和骨龄,分别使用DEXA和BIA(有16名男童和11名女童未完成BIA测试)测量儿童%BF。结果:DEXA所测儿童上肢、大腿、躯干和全身%BF均随骨龄增加而持续增加,在相同骨龄段儿童大腿部分%BF都要高于上肢和躯干部分%BF。在剔除性别和骨龄变量的影响条件下,儿童全身%BF_(DEXA)与%BF_(BIA)二变量的偏相关系数为0.906(P<0.01)。所有儿童全身%BF(DEXA)与%BF_(BIA)之间的线性回归分析,回归方程为DEXA%BF=1.040BIA%BF+0.119,判定系数R^2=0.846,回归估计的标准误差SEE=3.779kg。结论:随着生长发育的进行儿童身体局部和全身%BF具有逐渐升高的趋势。BIA与DEXA在测量儿童全身体脂率时具有很高的相关性,BIA可以作为一种评价全身体脂率的方法。Objective： The changing characteristics of children＇ s body composition for different degrees of development were measured by dual-energy X-ray absorptiometry （DEXA） and bioelectrical impedance analysis （BIA） aged 6 - 12 years by bone. Relationships between DEXA and BIA were researched. Methods： A total of 235 children aged 6 - 12 years by bone （male,n = 127; female,n = 108 ） were recruited. Height, weight, body mass indexes （BMI） and bone age were measured for each subject. Body fat percentage （% BF） was measured by DEXA and BIA （ 16 boys and 11 girls had not been measured by BIA）. Results ： Children＇ s % BF of upper limb, thigh, Irunk and total body were increased by bone age. At the same bone age, % BF of thigh was the biggest. % BFDEXA was correlated with % BFBIA and the correlation coeffi- cient was 0.906 （P 〈 0.01 ）. On linear regression analysis, DEXA % BF = 1. 040BIA% BF ＋ 0. 119, R2 = 0. 846 and the standard error of the estimate（SEE） was 3. 779kg. Conclusion： Children＇ s % BF of upper limb, thigh, trunk and total body were increased by degrees of development. The correlation between % BFDEXA and % BFBIA was high. BIA could be used tO measure body comoosition of children.

关 键 词：体脂率 双能X线吸收法 生物电阻抗法 骨龄 

分 类 号：G804.7[文化科学—运动人体科学]