Abstract P128: A New Device for Objective Measurement of Sedentary Behavior
Objective measurement of sedentary behavior with accelerometers is an important part of epidemiological research. Unfortunately, the definition of sedentary behavior includes both “sitting and low levels of energy expenditure”, which are not usually measured by popular activity monitors. Currently, there is only one research device (ActivPAL) that can objectively measure both body posture and activity for sedentary behavior classification. The purpose of this study was to compare the Lumoback device, a commercial accelerometer-based posture monitor, for sedentary measurement during daily activities to the ActivPAL. The Lumoback also has real-time feedback delivered to the user through their mobile device, which may prove to be instrumental in sedentary intervention research. Subjects (N=33) wore the Lumoback and ActivPAL devices simultaneously during waking hours while continuing with their normal activity patterns. Linear regression showed good correlation between sitting minutes (R2=0.89, p < 0.001) and standing minutes (R2=0.86, p < 0.001) from the devices. There was no significant difference (p > 0.05) between the seconds of sedentary behavior measured with the lumoback and seconds sitting/lying measured with the ActivPAL. The lumoback posture monitor was similar to the ActivPAL for measurement of sedentary behavior, and could be used to measure sedentary behavior over the course of a waking day.
Author Disclosures: M. Rosenberger: None. W. Haskell: None. M. Buman: None. B. LaStofka: None. L. Carstensen: None.
- © 2014 by American Heart Association, Inc.