Differences in Body Density and Perceived Exertion Determined by Hydrostatic Weighing at Three Selected Lung Volumes PDF Download
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Author: Holly Ann Grenier
Publisher:
ISBN:
Category : Body composition
Languages : en
Pages : 144
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Author: Holly Ann Grenier
Publisher:
ISBN:
Category : Body composition
Languages : en
Pages : 144
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Author: Kwai Ming Wa
Publisher:
ISBN:
Category : Adipose tissues
Languages : en
Pages : 278
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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.
Author: Dean Witherspoon
Publisher:
ISBN:
Category : Human body
Languages : en
Pages : 132
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Book Description
This study compared body density (BD) and percent body fat (%BF) arrived at by using four different lung volumes in the hydrostatic weighing (HW) procedure. The four lung volumes were residual volume as measured in air (RV-dry), residual volume as measured immersed in water (RV-wet), functional residual capacity, as measured immersed (FRC), and total lung capacity as measured immersed (TLC). The closed circuit oxygen dilution technique was used to measure all lung volumes.
Author: Mary J. DeLisio
Publisher:
ISBN:
Category : Adipose tissues
Languages : en
Pages : 110
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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 of a 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
Author: Joann M. McGarty
Publisher:
ISBN:
Category : Body composition
Languages : en
Pages : 130
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Book Description
This study compared hydrostatic weighing (HW) at residual volume (RV), total lung capacity (TLC)-dry and TLC-wet in the determination of body density (00) and percent body fat (%BF). Considering the comfort of the submerged Ss, it was the dim of this study to establish a HW method which was reliable. Student volunteers included 44 competitive swimmers (25 females; 19 males) and 55 noncompetitive swimmers (31 females; 24 males) ages 17-34. Residual volume was determined by the open circuit nitrogen washout technique. Dry and wet measurements of forced vital capacity (FVC) and TLC were obtained from all Ss to determine appropriate measurement in application to BD and %BF calculations . All Ss underwent HW at RV and TLC. Three BD and %BF were calculated for Ss by applying lung measurements of RV, TLC-dry and TLC-wet. Ss noted method preference; at RV, TLC or neither. A 3 way ANOVA with repeated measures followed by a Scheffe' Post Hoc Test was used to analyze the following variables: FVC-dry, FVC-wet, TLC-dry, TLC-wet, BD and %BF by HW at RV, TLC-dry and TLC-wet. A Chi Square analyzed Ss HW method preference. There was a sig (p .01) reduction in FVCwet and TLC-wet when compared to those measurements dry in Ss combined. There were sig (p.01) diff between HW at RV vs HW at TLC-dry and HW at RV vs HW at TLC-wet ('F %BF differences = 3.64% and 1.77%, respectively) in Ss combined. %BF with HW at RV at TLC-wet at TLC-dry. A1 1 subgroups and Ss combined preferred HW at TLC (p
Author: Jerry L. Coffman
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Michael N. Sawka
Publisher:
ISBN:
Category : Anthropometry
Languages : en
Pages : 198
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Author: Chi Shing Lee
Publisher:
ISBN:
Category : Body composition
Languages : en
Pages : 114
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Author: Institute of Medicine
Publisher: National Academies Press
ISBN: 030904586X
Category : Technology & Engineering
Languages : en
Pages : 371
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Book Description
This book surveys the entire field of body composition as it relates to performance. It includes a clear definition of terminology and a discussion of the various methods for measuring body composition. The authored papers represent a state-of-the-art review of this controversial field and address questions such as: What is a better measure of body compositionâ€"body fat or lean body mass? Does being overweight for one's height really affect performance? The book also addresses the issue of physical appearance as it relates to body fatness and performance. It includes an in-depth discussion of many of the topics of interest to those involved in sports medicine and exercise physiology.
Author: Chester J. Zelasko
Publisher:
ISBN:
Category : Body composition
Languages : en
Pages : 118
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Book Description
