Kaminsky L A, Whaley M H
Ball State University, Human Performance Laboratory, Muncie, IN.
J Sports Med Phys Fitness. 1993 Jun;33(2):172-7.
The purpose of the present investigation was to analyze the replicability of percent body fat (% fat) determined from Bioelectrical Impedance Analyses (BIA) after 2 different postprandial time periods and by 2 different technicians. The BIA % fat measures were also compared to those determined from skinfold measurements (SF) and hydrostatic weighing (HW). Fifteen physically active men had body composition determined on 4 separate days over a 2 week period under controlled conditions, once each week after fasting for 12 hours and once after 3 hours. Each day the subjects had BIA and SF measures taken by different trained technicians. Once each week the subjects also were hydrostatically weighed (HW). There were no differences for either BIA or SF between the 2 postprandial time periods. There were significant differences between technicians for both BIA and SF (p < 0.01), although the relationships between technicians were good (r = 0.90 and 0.95, respectively). Mean values for BIA (11.8 +/- 3.2%) and HW (11.0 +/- 7.2%) were similar, however, the correlation was only r = 0.50. These results indicate that although BIA gave relatively consistent values, it regressed both low and high % fat values towards the mean of the sample.
本研究的目的是分析在2个不同的餐后时间段以及由2名不同技术人员通过生物电阻抗分析（BIA）测定的体脂百分比（%脂肪）的可重复性。还将BIA测定的%脂肪值与通过皮褶测量（SF）和水下称重（HW）测定的值进行了比较。15名身体活跃的男性在2周内的4个不同日子，在受控条件下测定身体成分，每周禁食12小时后进行一次，餐后3小时后进行一次。每天由不同的训练有素的技术人员对受试者进行BIA和SF测量。受试者每周还进行一次水下称重（HW）。两个餐后时间段的BIA或SF均无差异。BIA和SF在技术人员之间均存在显著差异（p < 0.01），尽管技术人员之间的相关性良好（分别为r = 0.90和0.95）。BIA的平均值（11.8 +/- 3.2%）和HW的平均值（11.0 +/- 7.2%）相似，然而，相关性仅为r = 0.50。这些结果表明，尽管BIA给出了相对一致的值，但它使%脂肪值的高低两端都向样本均值回归。
