Clark R R, Kuta J M, Sullivan J C, Bedford W M, Penner J D, Studesville E A
U.W. Hospital Sports Medicine Center, Madison 53705.
Med Sci Sports Exerc. 1993 Jan;25(1):151-8. doi: 10.1249/00005768-199301000-00021.
The purpose of this study was to compare the accuracy of body fat determinations and subsequent calculation of minimal weight (MW) by dual energy x-ray absorptiometry (DEXA), bioelectrical impedance (BIA), near-infrared photospectometry (NIR), and anthropometry (LOHMAN). Necessitated by mandatory state minimal weight testing, the methods were cross-validated on 95 Wisconsin high school wrestlers (mean +/- SD; age: 15.1 +/- 1.2 yr, height: 170.4 +/- 7.1 cm, weight: 63.4 +/- 9.8 kg). MW, defined as fat-free body/0.93, determined by hydrostatic weighing (HW) and residual volume via O2 dilution, served as the criterion. The validity of the four selected MW predictions were evaluated against HW by examining mean differences (MD), standard deviation differences (SDD), correlations (r), standard error of estimate (SEE), and total errors (TE). Statistically significant differences were shown between the methods and the criterion by t-tests; however, these were clinically small in Lohman (0.6 kg) and BIA (0.9 kg). TE ranged from 2.25 kg (Lohman) to 6.03 kg (NIR). The results indicated that Lohman skinfold equation provided the most accurate prediction of MW, demonstrating the highest correlation (0.972), lowest MD (0.6 kg), lowest SEE (2.12 kg), and lowest TE (2.25 kg) of the methods evaluated.
本研究的目的是比较双能X线吸收法（DEXA）、生物电阻抗法（BIA）、近红外光光谱法（NIR）和人体测量法（洛曼法）测定体脂以及随后计算最低体重（MW）的准确性。由于该州强制进行最低体重测试，因此对95名威斯康星州高中摔跤运动员（均值±标准差；年龄：15.1±1.2岁，身高：170.4±7.1厘米，体重：63.4±9.8千克）的这些方法进行了交叉验证。通过水下称重（HW）和通过氧气稀释法测定的残气量确定的MW（定义为去脂体重/0.93）作为标准。通过检查平均差异（MD）、标准差差异（SDD）、相关性（r）、估计标准误差（SEE）和总误差（TE），评估了四种选定的MW预测方法相对于HW的有效性。t检验显示方法与标准之间存在统计学显著差异；然而，洛曼法（0.6千克）和生物电阻抗法（0.9千克）的这些差异在临床上较小。TE范围从2.25千克（洛曼法）到6.03千克（近红外光光谱法）。结果表明，洛曼皮褶厚度方程对MW的预测最为准确，在所评估的方法中显示出最高的相关性（0.972）、最低的MD（0.6千克）、最低的SEE（2.12千克）和最低的TE（2.25千克）。
