Associations of body composition with physical performance and self-reported functional limitation in elderly men and women
Associations of body composition with physical performance and self-reported functional limitation in elderly men and women
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DOI：
10.1093/aje/kwf023
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发表时间：
2002-07-15
影响因子：
5
通讯作者：
Tager, IB
中科院分区：
文献类型：
--
作者：
Sternfeld, B;Ngo, L;Tager, IB
为了了解身体成分如何与功能障碍相关，作者检查了脂肪和瘦质量的绝对和相对测量与身体表现和自我报告的功能限制的横截面关联。样本由来自加利福尼亚州索诺马的1655名老年男女组成的社区队列组成，他们在1993-1994年间拥有关于身体成分、身体表现和功能限制的完整基线数据。身体表现通过步行速度和握力来评估，而全球功能限制则通过使用标准问题的自我报告来评估，涉及几个领域。使用双X射线能量吸收法得出的人群特异性预测方程，根据生物电阻抗估计瘦身质量和脂肪质量。较高的脂肪质量与较慢的行走速度和更大的功能受限的可能性有关，而较高的瘦质量通常只与更大的握力有关。较高的瘦质量/脂肪质量比(身体成分的相对衡量标准)与较快的步行速度和较少的限制有关。这些发现表明，脂肪质量对身体表现和整体功能的某些领域产生了负面影响，而瘦质量在绝对值上不是那么重要，但相对于身体脂肪量来说是重要的。
To understand how body composition relates to functional impairment, the authors examined cross-sectional associations of absolute and relative measures of fat and lean mass with physical performance and self-reported functional limitation. The sample consisted of a community-based cohort of 1,655 older women and men from Sonoma, California, who had complete baseline data in 1993-1994 on body composition, physical performance, and functional limitation. Physical performance was assessed by walking speed and grip strength, while global functional limitation, across several domains, was assessed by self-report using standard questions. Lean mass and fat mass were estimated from bioelectric impedance using population-specific prediction equations derived from dual x-ray energy absorptiometry. Higher fat mass was associated with slower walking speed and greater likelihood of functional limitation, while higher lean mass was generally associated only with increased grip strength. A higher lean mass-to-fat mass ratio, a relative measure of body composition, was associated with faster walking speed and less limitation. These findings suggest that fat mass negatively impacts some domains of physical performance and overall functioning, while lean mass is less significant in absolute terms but is important relative to amount of body fat.