Slaughter M H, Lohman T G, Boileau R A, Christ C B, Stillman R J
Physical Fitness Research Laboratory, Department of Kinesiology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801.
Department of Exercise and Sport Sciences, University of Arizona, Tucson, Arizona 85721.
Am J Hum Biol. 1990;2(3):209-217. doi: 10.1002/ajhb.1310020302.
The individual subcomponents of fat-free body (FFB) in relation to height were investigated in 131 white (N = 85) and black (N = 46) males (MW, MB) and 108 white (N = 63) and black (N = 45) females (FW, FB), aged 8 to 18 years. Bone mineral content (BM), bone width (BW), and bone mineral index (BMI) were measured using photon absorptiometry; total body water (TBW) was measured by deuterium dilution; body density was measured by hydrostatic weighing, correcting for residual lung volume; and estimates of lean body mass (LBM) were made from total body potassium ( K spectroscopy). The subcomponents of the FFB-BM, BW, BMI, TBW, and K-were regressed on the log of height to determine the exponent of the independent variable (Ht) that would most accurately predict the dependent variables (BM, BW, BMI, TBW, K) within gender and race. Regression equations were derived for each of the variables used to represent a subcomponent of the FFB on Ht. Significant (P < .05) racial differences were found in BW, with the MB having wider bones than the MW. Significant racial differences were observed in BMI with FB demonstrating a greater difference across height than FW. Racial differences in BM and TBW approached significance within the female sample. At heights greater than the mean of a typical pubescent child, the males had higher values for each of the variables, except for BMI, than did the females. The lower BMI values observed in males indicated that the rate at which male bones grow in width was greater than their rate of mineralization. Within the male sample, blacks had higher bone mineral than whites with the magnitude of these differences dependent on the variable under consideration. Within the female sample the blacks had greater amounts of BM and BMI in relation to height, while the whites had a greater amount of K. Therefore, the magnitude of the differences between blacks and whites in the subcomponents of the FFB are dependent on gender, stature, and the particular subcomponent of the FFB under consideration.
对131名8至18岁的白人（N = 85）和黑人（N = 46）男性（MW，MB）以及108名白人（N = 63）和黑人（N = 45）女性（FW，FB）的无脂体重（FFB）各个亚组分与身高的关系进行了研究。使用光子吸收法测量骨矿物质含量（BM）、骨宽度（BW）和骨矿物质指数（BMI）；通过氘稀释法测量总体水（TBW）；通过水下称重法测量身体密度，并校正残余肺容积；通过全身钾（钾光谱法）估算瘦体重（LBM）。将FFB的亚组分——BM、BW、BMI、TBW和K——对身高的对数进行回归，以确定能最准确预测性别和种族内因变量（BM、BW、BMI、TBW、K）的自变量（身高，Ht）的指数。得出了用于表示FFB各亚组分的每个变量关于Ht的回归方程。在BW方面发现了显著（P <.05）的种族差异，MB的骨骼比MW更宽。在BMI方面观察到显著的种族差异，FB在身高上的差异比FW更大。在女性样本中，BM和TBW的种族差异接近显著水平。在高于典型青春期儿童平均身高时，除BMI外，男性的每个变量值都高于女性。男性中观察到的较低BMI值表明男性骨骼宽度的生长速度大于其矿化速度。在男性样本中，黑人的骨矿物质含量高于白人，这些差异的大小取决于所考虑的变量。在女性样本中，黑人相对于身高的BM和BMI含量更高，而白人的K含量更高。因此，FFB亚组分中黑人和白人之间差异的大小取决于性别、身高以及所考虑的FFB特定亚组分。
