Cable A, Nieman D C, Austin M, Hogen E, Utter A C
Department of Health and Exercise Science, Appalachian State University, Boone, NC 28608, USA.
J Sports Med Phys Fitness. 2001 Sep;41(3):411-4.
This study determined the validity of the leg-to-leg bioelectrical impedance analysis (BIA) system (Tanita Body Fat Analyzer, TBF 105, Tanita Corporation of America, Inc., Arlington Heights, IL) in estimating body composition in males.
Fat-free mass (FFM) was estimated using BIA and underwater weighing, and compared.
Subjects were recruited from the community.
Heterogeneous group of males (N=192) was recruited, with a mean+/-SD age of 39.0+/-16.8 yrs; body mass index, 26.0+/-4.0 kg/m2, percent body fat, 18.1+/-8.9 percent.
Prior to BIA testing, subjects were required to adhere to standard BIA testing guidelines, and bioelectrical impedance was measured in subjects standing erect with bare feet on the analyzer's footpads, and wearing a swimsuit. Underwater weighing was conducted using standard procedures, with direct measurement of residual volume.
A Bland-Altman plot of difference between FFM measured by underwater weighing and BIA versus average FFM by the two methods showed no systematic difference (mean difference, 0.07+/-3.5 kg). FFM was estimated at 66.3+/-8.6 kg with underwater weighing, and 66.2+/-7.7 kg with BIA (r=0.92, p<0.001; SEE 3.5 kg).
These data indicate that the leg-to-leg bioelectrical impedance system accurately assesses FFM in a heterogenous group of males when compared to underwater weighing.
本研究确定了双腿生物电阻抗分析（BIA）系统（Tanita体脂分析仪，TBF 105，美国Tanita公司，伊利诺伊州阿灵顿高地）在评估男性身体成分方面的有效性。
使用BIA和水下称重法估算去脂体重（FFM）并进行比较。
受试者从社区招募。
招募了一组异质性男性（N = 192），平均年龄±标准差为39.0±16.8岁；体重指数为26.0±4.0kg/m²，体脂百分比为18.1±8.9%。
在进行BIA测试前，要求受试者遵守标准的BIA测试指南，受试者赤脚直立站在分析仪的脚垫上并穿着泳衣时测量生物电阻抗。水下称重采用标准程序进行，直接测量残气量。
水下称重法和BIA法测量的FFM差值与两种方法测得的平均FFM的Bland-Altman图显示无系统差异（平均差值为0.07±3.5kg）。水下称重法测得的FFM为66.3±8.6kg，BIA法测得的FFM为66.2±7.7kg（r = 0.92，p<0.001；标准误为3.5kg）。
这些数据表明，与水下称重法相比，双腿生物电阻抗系统能准确评估异质性男性群体的FFM。
