Effect of Thoracic Gas Volume Prediction Equations on Body Fat in a 3- Component Model: A Pilot Study
Document Type
Poster Presentation
Publication Date
4-17-2026
Keywords
fsc2026
Abstract
Air Displacement Plethysmography (ADP), a laboratory-based method using measured thoracic gas volume (TGVm) or different equations to predict TGV, alone estimates fat mass (FM) and Fat-Free Mass (FFM). Compared to a 2-component model, using whole body bioelectrical impedance (WB-BIA) devices such as the InBody570™ with ADP establishes a 3-component model to estimate FM, fat-free dry mass (FFDM), and total body water (TBW). As TGVm can be limited due to failure in obtaining data, a 3-component model using TBW estimates may improve viability of TGV prediction equations provided by Crapo (TGVp) and Ducharme (TGVd). Therefore, the purpose of this pilot study is to explore the influence of TGV predictions and measurement on 3-component model estimates of FM. A sample of 18 participants adhered to pre-test guidelines were assessed in a randomized fashion using WB-BIA, Lower body BIA, and ADP methods in a single visit to the SJF Athletic Performance lab. The current study proposes a potential for TGV prediction equations to have greater viability when compared to TGVm values in a 3-component model with TBW.
Publication Information
Walline, Zachary; Getter, Isabella; Stewart, Jessica; and Wells, Dr. Andrew, "Effect of Thoracic Gas Volume Prediction Equations on Body Fat in a 3- Component Model: A Pilot Study" (2026). Fisher Showcase 2026. Paper 176.
https://fisherpub.sjf.edu/fsc2026/176
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Comments
Poster presented at the 2026 Fisher Showcase, St. John Fisher University, April 17, 2026.