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Influence of body position on bioelectrical impedance analysis

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Bibliographic Details
Title: Influence of body position on bioelectrical impedance analysis
Authors: Garcia Petershof Laura, Barioudi Hatim, Felderhoff Thomas
Source: Current Directions in Biomedical Engineering, Vol 11, Iss 1, Pp 469-472 (2025)
Publisher Information: De Gruyter, 2025.
Publication Year: 2025
Collection: LCC:Medicine
Subject Terms: bioelectrical impedance analysis, bia, body position, influence, postural changes, Medicine
Description: Understanding how body position changes affect bioimpedance is essential for improving wearable technology. This study assessed the influence of posture and timerelated changes on whole-body bioimpedance in 12 volunteers, who maintained sitting, standing and supine positions for 15 minutes each. Changes in body position influenced bioimpedance. Transitioning from standing to sitting led to a average bioimpedance decrease of -2.97 ± 1.19%, which reversed when returning to a standing position. Moving to a supine position resulted in an initial increase of in average 2.55 ± 1.15%, followed by a further rise to 4.25 ± 0.91% over 15 minutes. These results are consistent with previous studies and confirm that deviations from standard clinical positions influence the results of BIA measurements. The study highlights the need to adapt BIA for non-standard positions to optimize and ensure accuracy. Key factors such as hydrostatic pressure on the change in fluid distribution need to be considered in portable BIA applications and future research should incorporate correction models where appropriate.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 2364-5504
Relation: https://doaj.org/toc/2364-5504
DOI: 10.1515/cdbme-2025-0219
Access URL: https://doaj.org/article/0c4899dde45e4c35970faff6f390bd45
Accession Number: edsdoj.0c4899dde45e4c35970faff6f390bd45
Database: Directory of Open Access Journals
Description
Abstract:Understanding how body position changes affect bioimpedance is essential for improving wearable technology. This study assessed the influence of posture and timerelated changes on whole-body bioimpedance in 12 volunteers, who maintained sitting, standing and supine positions for 15 minutes each. Changes in body position influenced bioimpedance. Transitioning from standing to sitting led to a average bioimpedance decrease of -2.97 ± 1.19%, which reversed when returning to a standing position. Moving to a supine position resulted in an initial increase of in average 2.55 ± 1.15%, followed by a further rise to 4.25 ± 0.91% over 15 minutes. These results are consistent with previous studies and confirm that deviations from standard clinical positions influence the results of BIA measurements. The study highlights the need to adapt BIA for non-standard positions to optimize and ensure accuracy. Key factors such as hydrostatic pressure on the change in fluid distribution need to be considered in portable BIA applications and future research should incorporate correction models where appropriate.
ISSN:23645504
DOI:10.1515/cdbme-2025-0219