西藏曲水县6~15岁藏族儿童青少年LMS法骨骼肌和脂肪相关指标分析

LMS Analysis of muscle,fat and other related indicators of 615 years old Tibetan children and adolescents in Qushui county of Lhasa

目的:采用偏度系数中位数变异系数法(LMS法)研究藏族儿童肌肉脂肪生长发育特点。方法:2018年调查拉萨市曲水县6个乡镇6~15岁在校中小学生3288名。按照《2010年全国学生体质健康调研工作手册》规定的方法进行身体测量;采用生物电阻抗方法进行身体成分测定。以LMS法拟合男生、女生身高、体重、体脂肪含量、体质指数(BMI)和体脂率随年龄变化的百分位数曲线图。结果:LMS曲线显示,不同指标中,男生女生各百分位曲线的变化趋势、曲线间的距离、曲线光滑程度有差别,11~13岁时,男生体重和BMI的增长低于女生,男生的体脂率和体脂肪含量增长速度小于女性。从12岁开始,男生骨骼肌含量增加速度快于女生。结论:藏族儿童青少年的身高、体重、BMI、骨骼肌含量,体脂肪含量和体脂率总体随年龄增加而增加。11~13岁时,体重、BMI、体脂总量、体脂率和骨骼肌含量在性别间差异大。

Objective:To study the growth and development characteristic of muscle fat of Tibetan children and adolescents by the coefficient of skewness median coefficient of variation(LMS)method.Methods:In 2018,3288 primary and secondary school students aged 615 years old from six townships of Qushui County,Lhasa City were investigated by the 2010 National Student Physical Health Research Manual.Their body measurements were carried out according to the 2010 National Student Physical Health Research Manual and their body composition measurement was carried out by bioresistive method.LMS method was used to fit the percentile curves of the body height,body weight,body fat content,BMI,and body fat rate of boys and girls with age.Results:LMS curve displayed,in the different indicators,there were different in changing trend of percentage curves,distance of curves,and smoothness of curves between the boys and girls.At the age of 11-13,the increasing of boys'weight and BMI were significant lower than those of girls,and during the same period,body fat rate and body fat content of boys increased less than those of girls.From 12 years old,the bone muscle content of boys increased faster than that of girls.Conclusion:The height,weight,BMI,skeletal muscle content,body fat content,and body fat rate of Tibetan children and adolescents increase with age.There are significant different in the weight,BMI,skeletal muscle content,body fat content,and body fat rate of Tibetan children and adolescents between boys and girls in 1113 years old.