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Journal of Obesity
Volume 2010 (2010), Article ID 856376, 8 pages
http://dx.doi.org/10.1155/2010/856376
Clinical Study

Validation of a Novel Physical Activity Assessment Device in Morbidly Obese Females

1Department of Epidemiology, University of Iowa, Iowa City, IA 52242, USA
2Department of Surgery, University of Iowa, Roy J. and Lucille A. Carver College of Medicine, Iowa City, IA 52242, USA
3Department of Biostatistics, College of Public Health, University of Iowa, Iowa City, IA 52242, USA
4Institute for Clinical and Translational Science, University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, IA 52242, USA

Received 2 September 2009; Accepted 29 November 2009

Academic Editor: Michael M. Murr

Copyright © 2010 Soyang Kwon et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Assessment of physical activity in morbidly obese subjects is important especially in bariatric surgery. We examined the validity of Intelligent Device for Energy Expenditure and Activity (IDEEA) for measuring physical activity and sedentary behavior in morbidly obese women. Activity types, gait counts, and speed detected by the IDEEA monitor were compared to those reported by an observer. The IDEEA monitor detected activity types and gait counts with relatively high accuracy, although slightly lower in extremely obese women than in normal weight controls. The IDEEA monitor accurately estimated gait speeds in both groups. Since gait speed predicts energy expenditure more accurately than gait counts, it is of greater clinical relevance. Reliability of the IDEEA monitor was excellent. The IDEEA monitor is a valid instrument for measuring physical activity and sedentary behavior in extremely obese women, and therefore has potential applications in bariatric surgery both in preoperative evaluation and long-term follow-up.