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Estimating Oxygen Uptake during Non-Steady-State Activities and Transitions Using Wearable Sensors

Publication Type Journal Article
Authors Marco Altini, Julien Penders, Oliver Amft
Title Estimating Oxygen Uptake during Non-Steady-State Activities and Transitions Using Wearable Sensors
Abstract In this paper, we present a method to estimate oxygen uptake (V O2) during daily life activities and transitions between them. First, we automatically locate transitions between activities and periods of non-steady-state V O2. Subsequently, we propose and compare activity-specific linear functions to model steady-state activities and transition-specific non-linear functions to model non-steady-state activities and transitions. We evaluate our approach in study data from 22 participants that wore a combined accelerometer and heart rate (HR) sensor while performing a wide range of activities (clustered into lying, sedentary, dynamic/household, walking, biking and running), including many transitions between intensities, thus resulting in non-steadystate V O2. Indirect calorimetry was used in parallel to obtain V O2 reference. V O2 estimation error during transitions between sedentary, household and walking activities could be reduced by 16% on average using the proposed approach, compared to state of the art methods.
Publication IEEE Journal of Biomedical and Health Informatics
Volume 20
Issue 2
Pages 469–475
Date 2015
DOI 10.1109/JBHI.2015.2390493
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