Comparison of Hydrostatic Weighing at Residual Volume and Total Lung Capacity in Boys

Body composition --Measurement

Delisio, Mary J.Butts, Nancy K. ;

University of Wisconsin

关键词: Body composition --Measurement;   

Others  :  https://minds.wisconsin.edu/bitstream/handle/1793/53032/delisio_mary1982.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: University of Wisconsin

【 摘 要 】

This study was designed to determine if hydrostatic weighing (HW) at total lung capacity (TLC) yield the same results as HW at residual volume (RV). Forty-two boys (i = 10.4 y r ) from the La Crosse, WI, area were given a spirometry test to determine their vital capacity (VC).Three trials were performed and the highest reading was used as the measure of VC. The RV was determined on land utilizing the closed circuit oxygen dilution technique. This value was added t o the VC measurement and represented the SS;; TLC. SS were instructed to perform HW at RV and TLC. The RV method consisted ofa full expiration prior to submersion, and was performed until 3 identical readings were attained. The TLC consisted of a full inspiration prior to submersion, and was performed until 3 identical readings were reached. A dependent t-test was performed on these data at the ,05 level. Small but statistical diff (p <.05) in body density and % fat values were observed. RV produced 1.0629 g/ml vs TLC 1.0640 g/ml . The TLC method resulted in a 0.4% lower % fat than the RV method. Although the diff between body composition parameters determined by HW a t RV and TLC were statistically sig they were with in the +/- 4% error estimated in achieving body density through HW (Siri, 1961). HW at TLC ia possible method for children who are uncomfortable in the water and are unable to perform the RV method of a maximal expiration.