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Minderico CS, Silva AM, Teixeira PJ, et al. Validity of air-displacement plethysmography in the assessment of body composition changes in a 16-month weight loss program. Nutr Metab (Lond). 2006;3:32doi: 10.1186/1743-7075-3-32.
Minderico, C. S., Silva, A. M., Teixeira, P. J., Sardinha, L. B., Hull, H. R., & Fields, D. A. (2006). Validity of air-displacement plethysmography in the assessment of body composition changes in a 16-month weight loss program. Nutrition & metabolism, 332. https://doi.org/10.1186/1743-7075-3-32
Minderico, Cláudia S, et al. "Validity of air-displacement plethysmography in the assessment of body composition changes in a 16-month weight loss program." Nutrition & metabolism vol. 3 (2006): 32. doi: https://doi.org/10.1186/1743-7075-3-32
Minderico CS, Silva AM, Teixeira PJ, Sardinha LB, Hull HR, Fields DA. Validity of air-displacement plethysmography in the assessment of body composition changes in a 16-month weight loss program. Nutr Metab (Lond). 2006 Aug 22;3:32. doi: 10.1186/1743-7075-3-32. PMID: 16925811; PMCID: PMC1560140.
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Nutr Metab (Lond). 2006 Aug 22;3:32. doi: 10.1186/1743-7075-3-32.

Validity of air-displacement plethysmography in the assessment of body composition changes in a 16-month weight loss program.

Nutrition & metabolism

Cláudia S Minderico, Analiza M Silva, Pedro J Teixeira, Luis B Sardinha, Holly R Hull, David A Fields

Affiliations

  1. Exercise and Health Laboratory, Faculty of Human Movement, Health and Exercise Science, Technical University of Lisbon, Portugal. [email protected]

PMID: 16925811 PMCID: PMC1560140 DOI: 10.1186/1743-7075-3-32

Abstract

OBJECTIVE: To compare the accuracy of air displacement plethysmography (ADP) and dual energy x-ray absorptionmetry (DXA) in tracking changes in body composition after a 16 month weight loss intervention in overweight and obese females.

METHODS: 93 healthy female subjects (38.9 +/- 5.7 yr, 159.8 +/- 5.6 cm, 76.7 +/- 9.9 kg, 30.0 +/- 3.4 kg/m2) completed a 16 month weight loss intervention. Eligible subjects attended 15 treatment sessions occurring over the course of 4 months with educational content including topics relating to physical activity and exercise, diet and eating behavior, and behavior modification. In the remaining 12 months, subjects underwent a lifestyle program designed to increase physical activity and improve eating habits. Before and after the intervention, subjects had their percent body fat (%fat), fat mass (FM), and fat-free mass (FFM)) assessed by DXA and ADP.

RESULTS: Significant differences (p < or = 0.001) were found between DXA and ADP at baseline %fat (46.0 % fat vs. 42.0 % fat), FM (35.3 kg vs. 32.5 kg) and FFM (40.8 kg vs. 44.2 kg) as well as at post intervention for %fat (42.1% fat vs. 38.3 % fat), FM (30.9 kg vs. 28.4 kg) and FFM (41.7 kg vs. 44.7 kg). At each time point, ADP %fat and total FM was significantly lower (p < or = 0.001) than DXA while FFM was significantly higher (p < or = 0.001). However, both techniques tracked %fat changes similarly considering that there were no differences between the two means. Furthermore, a Bland-Altman analysis was performed and no significant bias was observed, thus demonstrating the ability of ADP to measure body fat across a wide range of fatness.

CONCLUSION: At baseline and post weight loss, a significant difference was found between ADP and DXA. However, the results indicate both methods are highly related and track changes in %fat similarly after a weight loss program in overweight and obese females. Additionally, the mean changes in %fat were similar between the two techniques, suggesting that ADP can be translated to its use in clinical practice and research studies as DXA currently is used.

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