Evaluation of the BOD POD for estimating percentage body fat in a heterogeneous group of adult humans

Vescovi, Jason D.; Zimmerman, Shannon L.; Miller, Wayne C.; Hildebrandt, Leslie Anne; Hammer, Roger L.; Fernhall, Bo

doi:10.1007/s004210100459

Cited by 80 publications

(67 citation statements)

References 12 publications

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“…Nevertheless, ADP may still be a more practical and equally precise method of body composition measurement in children compared with HW, especially in multi-compartment models (Wells & Fuller, 2001). The test-retest variability in measured raw body volume, equivalent to 0.8% BF was less than (Demerath et al, 2002) or comparable with that found in some studies (Miyatake et al, 1999;Vescovi et al, 2001;Wells & Fuller, 2001), but greater than that found by others (McCrory et al, 1995;Collins et al, 1999). However, unlike some of these studies, the variation in measured body volume was assessed in repeats of the whole test procedure (which consisted of the mean of two serial measures of raw volume), and so better highlighted precision of one complete procedure.…”

Section: Discussionsupporting

confidence: 61%

“…The BODPOD takes a correction for the negative volume effect of isothermal air close to the skin by use of a derived surface area artifact (SAA), highly dependent on estimated body surface area as described below. As body surface area estimation is a main determinant of this SAA it may be a possible source of inaccuracy within this method (Vescovi et al, 2001). …”

Section: Discussionmentioning

confidence: 99%

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Evaluation of factors determining the precision of body composition measurements by air displacement plethysmography

Collins

McCarthy

2003

Eur J Clin Nutr

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Objectives: To investigate methodological precision of air displacement plethysmography for assessment of body composition in a heterogenous sample of adults. Design: Accuracy of volume measurements by air displacement plethysmography (ADP) for a range of known volumes was ascertained. Repeated measurements of body volume, lung volume, and derived body composition using the BODPOD measurement system were performed. Influence of surface area estimation on ADP measurement was investigated as a possible source of variation. Setting: Clinical Nutrition Laboratory, School of Health & Sports Science, University of North London, London, UK. Subjects: One hundred and two healthy subjects (57 women, 45 men) who ranged in age between 16 and 55 y and in BMI (kg/ m 2 ) between 17.8 and 41.9. Study design: Cross-sectional study of healthy adults for comparison with previous studies. Repeat measurements of raw body volume, lung volume and % body fat (BF) by ADP were all performed on the same day. Results: From the range of known volumes a marked increase in the CV and a significantly greater measurement error were found at volumes below 40 l (P ¼ 0.04). Repeat measurements of raw body volume in human subjects resulted in a technical error equivalent to 0.8% BF. There was no significant difference found between measured and predicted lung volume and the 95% confidence interval for difference was only 0.3% BF. Repeat measurements of lung volume in our subset resulted in a technical error equivalent to 0.5% BF. Although body surface area estimation only accounted for variation in % BF of 0.1%, the extent of variation appeared to be governed by leanness (Po0.001). Conclusions: Although ADP retains excellent precision, in practice, repeat measurements of ADP should be performed whenever possible to allow for erroneous volume measurement within one procedure. Protocols for ADP measurement should be created with an awareness of those factors, which may affect measurements.

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Section: Discussionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Evaluation of factors determining the precision of body composition measurements by air displacement plethysmography

Collins

McCarthy

2003

Eur J Clin Nutr

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“…4,6,11,18,19,25 These values are also probably dependent to some extent on prevailing ambient conditions and variations in the performance of individual instruments, although the latter should be minimized as each instrument is of a standard manufactured by a single company. Accordingly, a variable level of precision (although even the worst case was still very good) has been observed in a number of different subjects undergoing repeated measurements in other studies ( JCK Wells and JE Williams, unpublished).…”

Section: Discussionmentioning

confidence: 99%

Within- and between-laboratory precision in the measurement of body volume using air displacement plethysmography and its effect on body composition assessment

et al. 2003

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OBJECTIVE:To determine and compare the extent of within-and between-laboratory precision in body volume (BV) measurements using air displacement plethysmography (ADP), the BOD POD body composition system, and to interpret any such variability in terms of body composition estimates. DESIGN: Repeated test procedures of BV assessment using the BOD POD ADP were reproduced at two laboratories for the estimation of precision, both within and between laboratories. SUBJECTS: In total, 30 healthy adult volunteers, 14 men (age, 19-48 y; body mass index (BMI), 19.7-30.3 kg/m 2 ) and 16 women (age, BMI,.7 kg/m 2 ), were each subjected to two test procedures at both laboratories. Two additional volunteers were independently subjected to 10 repeated test procedures at both laboratories. MEASUREMENTS: Repeated measurements of BV, uncorrected for the effects of isothermal air in the lungs and the surface area artifact, were obtained using the BOD POD ADP, with the identical protocol being faithfully applied at both laboratories. Uncorrected BV measurements were adjusted to give estimates of actual BV that were used to calculate body density (body weight (BWt)/actual BV) from which estimates of body composition were derived. The differences between repeated BV measurements or body composition estimates were used to assess within-laboratory precision (repeatability), as standard deviation (SD) and coefficient of variation; the differences between measurements reproduced at each laboratory were used to determine between-laboratory precision (reproducibility), as bias and 95% limits of agreement (from SD of the differences between laboratories). RESULTS: The extent of within-laboratory methodological precision for BV (uncorrected and actual) was variable according to subject, sample group and laboratory conditions (range of SD, 0.04-0.13 l), and was mostly due to within-individual biological variability (typically 78-99%) rather than to technical imprecision. There was a significant (Po0.05) bias between laboratories for the 10 repeats on the two independent subjects (up to 0.29 l). Although no significant bias (P ¼ 0.077) was evident for the sample group of 30 volunteers (À0.05 l), the 95% limits of agreement were considerable (À0.68 to 0.58 l). The effects of this variability in BV on body composition were relatively greater: for example, within-laboratory precision (SD) for body fat as % BWt was between 0.56 and 1.34% depending on the subject and laboratory; the bias (À0.59%) was not significant between laboratories, but there were large 95% limits of agreement (À3.67 to 2.50%). CONCLUSION: Within-laboratory precision for each BOD POD instrument was reasonably good, but was variable according to the prevailing conditions. Although the bias between the two instruments was not significant for the BV measurements, implying that they can be used interchangeably for groups of similar subjects, the relatively large 95% limits of agreement indicate that greater consideration may be needed for assessing individuals with different ADP in...

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“…The reported correlation between the Bod Pod and hydrostatic weighing was r = 0.88. 14) All subjects were interviewed by experienced dietitians using a food frequency questionnaire (FFQ), which is based on 29 food groups and 10 types of cooking, for estimating the energy and nutrient intakes of each subject during the past 1-2 months. 15) From the FFQ, the mean daily energy intake was calculated according to the Tables of Japanese Foodstuff Composition.…”

Section: Methodsmentioning

confidence: 99%

Effects of Basic Karate Exercises on Maximal Oxygen Uptake in Sedentary Collegiate Women

Yoshimura

Imamura

2010

JOURNAL OF HEALTH SCIENCE

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The primary purpose of this study was to investigate the chronic effects of practicing 30 min of basic karate exercises (BKEs) for 10 weeks on maximal oxygen uptake (VO 2 max) in sedentary collegiate women who had no previous karate experience. The secondary purpose of this study was to investigate physiological responses and intensities of BKEs to examine the intensity of exercise. Nine women practiced 30 min of BKEs, 4 days·week −1 , for 10 weeks.The six other women acted as controls. The 30 min of BKEs consisted of 9 min of stationary basics in a parallel stance (S-Basics I), 12 min of stationary basics in a front stance (S-Basics II), and 9 min of movement basics in the front stance (M-Basics). For S-Basics I, the mean percent of maximumVO 2 reserve (%VO 2 R) was much lower than the accepted threshold, while the mean percent of maximum heart rate reserve (%HRR) was slightly lower than the accepted threshold for increasingVO 2 max, i.e., 40% oḟ VO 2 R or HRR. For S-Basics II, the mean %VO 2 R was marginal, while the mean %HRR was above the accepted threshold for increasingVO 2 max.

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Evaluation of the BOD POD for estimating percentage body fat in a heterogeneous group of adult humans

Cited by 80 publications

References 12 publications

Evaluation of factors determining the precision of body composition measurements by air displacement plethysmography

Evaluation of factors determining the precision of body composition measurements by air displacement plethysmography

Within- and between-laboratory precision in the measurement of body volume using air displacement plethysmography and its effect on body composition assessment

Effects of Basic Karate Exercises on Maximal Oxygen Uptake in Sedentary Collegiate Women

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