title: Resulting Shifts in Percentile and Standard Placements after Comparison of the BOD POD and DXA.
abstract: The purpose of this study was to determine the validity of the BOD POD® when compared to the DXA and if placement on a percentile chart and standard table is affected by any differences between the two measures. A total of 244 (27.7 ± 10.8 yrs, 77.3 ± 16.1 kg, 171.4 ± 10.1 cm, 26.31 ± 5.42 BMI) males and females between the ages of 18 and 52 were recruited to participate in this study. The participant's body fat percentage (%BF) was tested in random order on the BOD POD® and DXA during a 30-minute session following manufacturer's guidelines and procedures. Dependent t-test indicated the %BF measured by the BOD POD® (23.4% ± 12.8) was significantly lower when compared to the DXA (29.5% ± 12.1), p = .001. The Pearson's Product moment correlation was 0.95 (p = .001), indicating a very strong relationship between the two instruments. Using estimates of %BF from the BOD POD® also resulted in more favorable shifts on a percentile chart and standard table. Since a high correlation was evident between the two, the BOD POD® can be used as an instrument to track %BF changes over time during a diet and/or exercise intervention. However, caution should be made when classifying %BF with percentile charts or standard tables using the BOD POD® %BF estimates.
authors.affiliation: Human Performance Laboratory, Kinesiology and Health Education Department, Southern Illinois University Edwardsville, Edwardsville, Illinois, USA.
authors.forename: Timothy
authors.initials: T
authors.lastname: Heden
authors.affiliation: Human Performance Laboratory, Kinesiology and Health Education Department, Southern Illinois University Edwardsville, Edwardsville, Illinois, USA.
authors.forename: Steve
authors.initials: S
authors.lastname: Shepard
authors.affiliation: Texas A&M University-Kingsville, System Center, San Antonio, Texas, USA.
authors.forename: John
authors.initials: J
authors.lastname: Smith
authors.affiliation: Human Performance Laboratory, Kinesiology and Health Education Department, Southern Illinois University Edwardsville, Edwardsville, Illinois, USA.
authors.forename: Kay
authors.initials: K
authors.lastname: Covington
authors.affiliation: Human Performance Laboratory, Kinesiology and Health Education Department, Southern Illinois University Edwardsville, Edwardsville, Illinois, USA.
authors.forename: James
authors.initials: J
authors.lastname: Lecheminant
keywords: Dual energy x-ray absorptiometry; air displacement plethysmography; body fat