[年龄对健康北京女性身体成分的影响]

[Effect of age on body composition in healthy Beijing women].

作者信息

Chen Rong, Lin Shou-qing, Lin Xia, Chen Yan, Yang Qiu-hong, Zhou Yong, Zhang Ying

机构信息

Department of Obstetric and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China.

出版信息

Zhonghua Fu Chan Ke Za Zhi. 2008 Jan;43(1):36-40.

PMID:18366931

Abstract

OBJECTIVE

To observe the effect of age and menstrual status on body composition in healthy Beijing women.

METHODS

We measured body composition with dual-energy X-ray (GE Lunar Prodigy) in 316 healthy Beijing females aged 20 to 74 years (5-7 cases per age). Parameters provided by the software were as following: total body bone mineral content, lean mass, fat mass and fat percentage (%fat). Local regions measured included arm, leg, trunk, android region and gynoid region. Body mass index (BMI), fat mass index (FMI), free fat mass index (FFMI) and A/G were calculated. Volunteers were assigned to 6 groups according age by every ten years a group.

RESULTS

BMC peaked during the 4th decade, LM peaked during the 5th decade, with a decline of 18.1% and 5.2% respectively at age 74 years. Total body fat mass and %fat showed a general increase with aging throughout the studied age range. Total body fat mass increased from 16+/-5 kg at age 20-29 years to 24+/-6 kg at age 70-74 years, while %fat increased from 31.3% to 39.5%. All local region %fat increased with aging at different extents. Android region %fat showed the largest raise extent (32.2%). BMI increased gradually from 21.1 kg/m2 at age 20-29 years to 26.1 kg/m2 at age 70-74 years. FMI changed more obviously than FFMI. A/G increased from 0.85 at age 20-29 years to 1.02 at age 70-74 years. Different menstrual status in women of 40-59 years had obvious effect on A/G and BMC (P<0.05), while it had no significant effect on BMI, body weight and waist circumference (P>0.05).

CONCLUSIONS

Aging and menstrual status have evident effect on body composition distribution in healthy Beijing women.

摘要

目的

观察年龄和月经状态对健康北京女性身体成分的影响。

方法

我们使用双能X线（GE Lunar Prodigy）对316名年龄在20至74岁的健康北京女性（每个年龄段5 - 7例）进行身体成分测量。软件提供的参数如下：全身骨矿物质含量、瘦体重、脂肪量和脂肪百分比（%脂肪）。测量的局部区域包括手臂、腿部、躯干、男性化区域和女性化区域。计算体重指数（BMI）、脂肪量指数（FMI）、去脂体重指数（FFMI）和A/G。志愿者按年龄每十岁分为一组，共分为6组。

结果

骨矿物质含量（BMC）在第4个十年达到峰值；瘦体重（LM）在第5个十年达到峰值，在74岁时分别下降了18.1%和5.2%。在整个研究年龄范围内全身脂肪量和%脂肪总体上随年龄增长而增加。全身脂肪量从20 - 29岁时的16±5kg增加到70 - 74岁时的24±6kg，而%脂肪从31.3%增加到39.5%。所有局部区域的%脂肪均随年龄增长有不同程度增加。男性化区域%脂肪增加幅度最大（32.2%）。BMI从20 - 29岁时的21.1kg/m²逐渐增加到70 - 74岁时的26.1kg/m²。FMI变化比FFMI更明显。A/G从20 - 29岁时的0.85增加到70 - 74岁时的1.02。40 - 59岁女性不同月经状态对A/G和BMC有明显影响（P<0.05），而对BMI、体重和腰围无显著影响（P>0.05）。