中文摘要：

目的利用生物电阻抗分析法测量西藏藏族青少年身体各部脂肪含量的数值，提出适合西藏藏族青少年的脂肪含量基准值，探讨西藏藏族青少年的脂肪分布特点与规律。方法在知情同意的前提下，随机抽取1427例（男为710例，女为717例）父母均为藏族的西藏藏族健康青少年作为研究对象，应用体成分分析仪对所有受试者进行检测，得出脂肪总量、左上肢（左下肢、右上肢、右下肢、躯干）脂肪量等与脂肪相关的数值，进而推算出体脂肪率、左上肢（左下肢、右上肢、右下肢、躯干）脂肪率。所有结果输入SPSS 19．0统计学软件，进行独立样本t检验和方差分析统计学处理。结果西藏藏族青少年各年龄段的脂肪总量、四肢脂肪量、躯干脂肪量，男性均低于女性（P〈0．05）。总体西藏藏族青少年的脂肪含量随年龄增长而增加，女性的增加趋势更加显著。结论西藏藏族青少年的脂肪含量随年龄变化特点与体内激素分泌水平有关，体现了不同发育时期的生理特点。

英文摘要：

Objective To obtain the fat base value and the fat distribution characteristics of Tibetan teenagers in Tibet by counting their fat content with a bioelectrieal impedance method. Methods We randomly selected 1427 healthy teenagers （710 males, 717 females） whose parents were Tibetan in Tibet. They had signed the informed consent. We detected all subjects with the body composition analyzer and concluded the total fat, and fat contents of the left upper limb （left lower limb and right upper limb, right lower limb, trunk） , then worked out the body fat ratio, and fat ratio of the left upper limbs（ left lower limb, right upper limb and right lower limb, trunk）. All the results were analyzed with inputted SPSS（statistical software） and processed by independent sample t-test and variance analysis. Results The total fat mass, the fat mass of limbs and trunk in the male were less than that in the female in all age groups of Tibetan teenagers （P 〈 0.05）. In general, the fat content of Tibetan teenagers in Tibet increased with age, females＇ increasing trend was more pronounced. Conclusion The fat characteristics of tibetan teenagers in Tibet are related with age and hormone secretion, which reflects the physiological characteristics in different developmental stages.