Vescovi Jason D, Hildebrandt Leslie, Miller Wayne, Hammer Roger, Spiller Amanda
Exercise Science Programs, The George Washington University Medical Center, Washington, D.C. 20052, USA.
J Strength Cond Res. 2002 Nov;16(4):599-605.
The purpose of this investigation was to examine the accuracy of percent body fat (%BF) estimates obtained by air displacement plethysmography (ADP) using the BOD POD Body Composition System compared with hydrostatic weighing (HW) in a group of female college athletes (n = 80). In addition, %BF estimates by skinfold measures (SF) were also obtained for comparison. A lean subset (n = 39) of the sample was also examined. Mean %BF estimated for the entire sample by ADP (21.2 +/- 5.9%) was significantly greater than that determined by HW (19.4 +/- 6.4%) and SF (18.8 +/- 5.5%). Results from the lean subset also revealed that %BF determined by ADP (17.1 +/- 3.7%) was significantly higher than %BF estimates by HW (14.3 +/- 2.8%) and SF (15.2 +/- 3.2%). The regression equation for the entire sample (%BF HW = 0.937%BF ADP - 0.452, r(2) = 0.73, standard error of estimates (SEE) = 3.34) did not differ from the line of identity. In contrast, the line of identity differed significantly from the regression equation for the lean subset of female athletes (%BF HW = 0.48%BF ADP + 6.115, r(2) = 0.41, SEE = 2.18). The results of this investigation indicate that ADP significantly overestimated %BF by 8% in female athletes and by 16% for a leaner subset of the sample compared with HW. It appears that %BF estimates by SF may be more accurate than those obtained by ADP for female college athletes, regardless of body composition. Coaches and trainers evaluating body composition should consider the use of SF before ADP when measuring %BF in female college athletes. Sports scientists should continue to examine the possible gender and body composition bias for ADP.
本研究的目的是，在一组女大学生运动员（n = 80）中，比较使用BOD POD人体成分系统通过空气置换体积描记法（ADP）获得的体脂百分比（%BF）估计值与水下称重法（HW）的准确性。此外，还通过皮褶测量法（SF）获得了%BF估计值以作比较。还对样本中的一个瘦体重子集（n = 39）进行了检查。ADP对整个样本估计的平均%BF（21.2 +/- 5.9%）显著高于HW（19.4 +/- 6.4%）和SF（18.8 +/- 5.5%）确定的值。瘦体重子集的结果还显示，ADP确定的%BF（17.1 +/- 3.7%）显著高于HW（14.3 +/- 2.8%）和SF（15.2 +/- 3.2%）估计的值。整个样本的回归方程（%BF HW = 0.937%BF ADP - 0.452，r(2) = 0.73，估计标准误差（SEE） = 3.34）与恒等线无差异。相比之下，恒等线与女运动员瘦体重子集的回归方程（%BF HW = 0.48%BF ADP + 6.115，r(2) = 0.41，SEE = 2.18）有显著差异。本研究结果表明，与HW相比，ADP在女运动员中显著高估%BF 8%，在样本中较瘦的子集中高估16%。对于女大学生运动员，无论其身体成分如何，SF估计的%BF似乎可能比ADP获得的更准确。评估身体成分的教练和训练师在测量女大学生运动员的%BF时，应在使用ADP之前考虑使用SF。体育科学家应继续研究ADP可能存在的性别和身体成分偏差。
