【摘要】 目的 :　探讨北京市西城区汉族女生的体成分 ,以及与青春发育的关系。方法 :　用双能 X线吸收仪 (DEXA)测定 3 6 0名平均年龄为 1 0 .1岁的汉族女生的体成分 ,用 Tanner五分期法判定乳房和阴毛发育程度 ,询问月经初潮情况。结果 :　研究对象的全身骨矿物含量、瘦体重和体脂平均分别为 1 .3 4± 0 .2 0 kg、2 1 .2± 3 .5 kg和 1 0 .9± 4.5 kg(x± s) ,体脂百分比平均为 (3 1 .9± 8.0 ) %;随着乳房发育分期增加 ,其全身骨矿物含量、瘦体重、体脂以及体脂百分比均显著增加(P<0 .0 5 ) ,随月经初潮出现也呈类似趋势 ,但随着阴毛发育上述趋势并不显著。结论 :　青春前期女生体成分随青春发育发生显著变化。更多还原

【Abstract】 Objective: To evaluate the body-composition of Beijing Han pre-puberty girl and its relationship with puberty. Methods: Dual-energy X-ray absorptiometry was used to determine body composition in 360 Han pre-puberty girls of Beijing. Results: Mean (±SD) lean body mass (LBM), body fat (BF) and total body bone mineral content of girls aged 10.1 were 1.34±0.20, 21.2±3.5, and 10.9±4.5 kg, respectively. The percentage of fat is 31.9±8.0(%). With development of the breast, LBM, BF, the total body bone mineral content and percentage of body fat increase significantly. With the coming of menarche, it appears the same tendency. But with development of pubic hair, there is no such tendency. Conclusion: With development of puberty, body-composition changes greatly.更多还原