老年人随年龄增加肌肉衰减变化特点研究  

Muscle attenuation characteristics of the elderly

作　　者：陈敏[1] 林轶凡[1] 孙建琴[1] 李臻[1] 肖菲[1] 华莉[1] 李士捷[1] 

机构地区：[1]复旦大学附属华东医院临床营养中心,上海200040

出　　处：《肠外与肠内营养》2012年第5期263-266,共4页Parenteral & Enteral Nutrition

摘　　要：目的:应用生物电阻抗(BIA)分析仪研究老年人群随年龄增加肌肉衰减变化的特点。方法:测定833例人群瘦体组织、骨骼肌、去脂体重等机体组成,并分析人体各个不同部分的人体组成特点。结果:瘦体组织在30岁组为形成高峰,40岁后去脂体重、瘦体组织、骨骼肌、躯干和四肢瘦体组织重量逐渐减少,占体重百分比也逐渐降低,瘦体组织下降下肢比上肢明显。相反,体脂肪、脂肪百分比和内脏脂肪面积在20岁组最低,并随年龄增长而增加。60至80岁老年人肌肉衰减、体脂肪增长趋缓(P>0.05),内脏脂肪面积稳步增加(P<0.05)。老年女性体脂肪百分比明显高于男性(P<0.05)。结论:老年人肌肉尤其是下肢肌肉随年龄增长而衰减,脂肪组织则逐渐增加。Objective： The purpose of this study was to measure muscle attenuation of the elderly adults by bioelectrical impedance analysis（BIA）.Methods： 833 volunteers,aged 20 to 88 years,123 cases of old male and 152 cases of old female were measured by BIA.Results： The soft lean mass set a peak at 30-year-old,and fat free mass,soft lean mass,skeletal muscle mass,soft lean mass of trunk and limbs decreased after 40-year-old.On the contrary,body fat mass,percent body fat and visceral fat area were lowest in 20-year-old,and increased by age.The changes of skeletal muscle mass and body fat mass were slow in elder adults between 60~80 years（P0.05）,and VFA increased steadily（P0.05）.Percent body fat of older women was significantly higher than men（P0.05）.Conclusion： In elder adults,soft lean mass,especially lower limb,decreased by age,and body fat mass increased.

关 键 词：生物电阻抗 机体组成 肌肉衰减变化 

分 类 号：R685[医药卫生—骨科学]