A Comparison of Three Hydrostatic Weighing Techniques: Without Head Submersion, Total Lung Capacity, and Residual Volume PDF Download

Author: Kwai Ming Wa
Publisher:
ISBN:
Category : Adipose tissues
Languages : en
Pages : 278

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Book Description
Abstract: The purpose of this study was to compare the without head submersion (HWNHS) and total lung capacity (HWTLC) hydrostatic weighing techniques to the criterion measure of hydrostatic weighing at residual volume (HWRV). Subjects were 54 healthy males. In an attempt to improve the accuracy of HWNHS, regression analysis was used to predict actual head volume from spherical head volume (R2 = .27, standard error of estimate (SEE) = 42 6 mL). Predicted head volume was then added to total body volume (TBV) determined by HWNHS. TBV for all three techniques was corrected by subtracting the appropriate lung and gastro-intestinal volumes. Mean body density (Db) was 1.065 g/mL, 1.072 g/mL, and 1.072 g/mL for HWRV, HWTLC, and HWNHS, respectively. Mean percent body fat (% fat) was 15.10%, 11.85%, and 11.89% for HWRV, HWTLC, and HWNHS, respectively. Significant differences in mean Db and % fat were observed, with HWTLC and HWNHS overestimating Db and underestimating % fat from HWRV. Although correlations between the three hydrostatic weighing techniques were greater than .85, the SEEs for predicting % fat measured by HWRV were 3.49% and 3.25% for HWTLC and HWNHS, respectively.