PDF(Pubmed)
Abstract：
Little is known about the changes in body composition (BC) in people with overweight or obesity. The aim of this study was to assess the differences in BC patterns in this population based on gender and age. A total of 2844 Italian adults of mixed gender and a body mass index (BMI) of ≥25 kg/m2 underwent a BC assessment by means of dual-energy X-ray absorptiometry (DXA). The sample was categorized into three age groups: \'young\' (20-39 years), \'middle\' (40-59 years), and \'older\' (60-80 years) adults, after being matched by body weight and BMI. Males showed higher total body fat percentage (BF%) and a lower total lean mass (LM), progressively from the young to the middle to the older age groups, while females showed similar values for these total compartments between the three age groups. However, in both genders, participants in the middle and older groups were more likely to have a higher trunk fat percentage by +1.23% to +4.21%, and lower appendicular lean mass (ALM) by -0.81 kg to -2.63 kg with respect to the young group, indicating expression of major central adiposity and sarcopenia. While our findings underscore the limitations of BMI to detect these differences between age groups, the identification of new tools suitable for this aim is greatly needed in this population. Moreover, further investigation that clarifies the impact of these differences in BC patterns between gender and age groups on health outcomes is also required.
摘要：
关于超重或肥胖人群身体成分（BC）的变化知之甚少。这项研究的目的是根据性别和年龄评估该人群BC模式的差异。通过双能X射线吸收法（DXA）对2844名混合性别和体重指数（BMI）≥25kg/m2的意大利成年人进行了BC评估。样本分为三个年龄组：“年轻”(20-39岁)，\'中期\'（40-59岁），和“年龄较大”（60-80岁）的成年人，在与体重和BMI相匹配后。男性表现出较高的总脂肪百分比（BF％）和较低的总瘦体重（LM），逐步从年轻人到中老年人群，而女性在三个年龄组之间的这些总室中显示出相似的值。然而,在两种性别中，中老年组的参与者更有可能有更高的躯干脂肪百分比+1.23%至+4.21%，与年轻组相比，阑尾瘦体重（ALM）降低-0.81kg至-2.63kg，表明主要中枢肥胖和肌少症的表达。虽然我们的发现强调了BMI检测年龄组之间这些差异的局限性，在这一人群中，非常需要确定适合这一目标的新工具。此外，还需要进一步调查,阐明性别和年龄组之间BC模式的这些差异对健康结局的影响.
