DENSITOMETRIC ANALYSIS OF BODY COMPOSITION REVISION OF SOME QUANTIATIVE ASSUMPTIONS
DENSITOMETRIC ANALYSIS OF BODY COMPOSITION REVISION OF SOME QUANTIATIVE ASSUMPTIONS
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DOI：
10.1111/j.1749-6632.1963.tb17079.x
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发表时间：
1963-01-01
期刊：
影响因子：
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通讯作者：
GRANDE, F
中科院分区：
文献类型：
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作者：
BROZEK, J;ANDERSON, JT;GRANDE, F
身体组成的双组分分析的密度测定系统使用已知或假定密度和组成的组分（隔室）。在1953年版本的明尼苏达密度测量系统中，体重被分成与“参考人”和“肥胖组织”相对应的质量。“参考人的密度是已知的（1.063）。假设脂肪占体重的14%。根据关于成年男性身体化学成分的现有资料，并辅以对身体矿物质的特殊考虑，建立了一个新的“参考身体”，并计算出其密度（1.064）。已知“参考体”的脂肪含量（体重的15.3%）。1953年，通过分析中年男性在正热量平衡开始六个月时体重在身高和年龄的正常范围内的体重增加，定义了标记为“肥胖组织”的隔室。当一个新的密度数字（1.078克/ ml.）用于标记为“细胞残余物”的隔室，这种肥胖组织的组成如下：细胞外水，14%;脂肪，64%;和“细胞残余物”，22%。当分析在年轻肥胖男性中观察到的体重减轻而不是体重增加时，得到以下组成：细胞外水，4%;脂肪，64%;和“细胞残留物”，32%。最后，当考虑到高和低身体密度的年轻人之间的差异时，该值分别为7%（细胞外水），73%（脂肪）和20%（“细胞残留物”）。在此信息的基础上，开发了用于估计“肥胖组织”、与该隔室相关的脂肪和总脂肪量的方程。看来，没有普遍有效的公式密度估计脂肪含量可以提供。尽管获得或失去的组织的复杂性和可变性，系统“参考身体”加上“肥胖组织”提供了某些优势，超过最简单的身体组成模型（“无脂肪加脂肪”），最初由Behnke提出。
Densitometric systems of two-component analysis of body composition operate with components (compartments) of known or assumed density and composition. In the 1953 version of the Minnesota densitometric system, the body weight was separated into a mass corresponding to that of the "reference man" and of the "obesity tissue." The density of the reference man was known (1.063). It was assumed that fat accounted for 14% of the body weight. On the basis of available information on the chemical composition of adult male bodies, supplemented by special considerations of body mineral, a new "reference body" was established and its density (1.064) was computed. The fat content of the "reference body" was known (15.3% of body weight). The compartment labeled "obesity tissue" was defined in 1953 by analyzing weight gains made by middle-aged men, in a normal range of body weight for height and age at the onset of six months of positive caloric balance. When a new density figure (1.078 gm./ml.) is used for a compartment labeled "cell residue," the composition of this variety of obesity tissue results as follows: extracellular water, 14%; fat, 64%; and "cell residue," 22%. When a weight loss observed in young obese men rather than weight gain is analyzed, the following composition is obtained: extracellular water, 4%; fat, 64%; and "cell residue," 32%. Finally, when the tissue accounting for the differences between young men of high and low body density is considered, the values are 7% (extracellular water), 73% (fat), and 20% ("cell residue") respectively. Equations for the estimation of the amount of "obesity tissue," of fat associated with this compartment, and of total fat were developed on the basis of this information. It appears that no universally valid formulas for densitometric estimation of the fat content can be offered. In spite of the complexity and variability of the tissue gained or lost, the system "reference body" plus "obesity tissue" offers certain advantages over the simplest model of body composition ("fat-free plus fat"), originally proposed by Behnke.