Abstract
Hiremath SV, Ding D, Farringdon J, Cooper RA. Predicting energy expenditure of manual
wheelchair users with spinal cord injury using a multisensor-based activity monitor.
Objective
To develop and evaluate new energy expenditure (EE) prediction models for manual wheelchair
users (MWUs) with spinal cord injury (SCI) based on a commercially available multisensor-based
activity monitor.
Design
Cross-sectional.
Setting
Laboratory.
Participants
Volunteer sample of MWUs with SCI (N=45).
Intervention
Subjects were asked to perform 4 activities including resting, wheelchair propulsion,
arm-ergometer exercise, and deskwork. Criterion EE using a metabolic cart and raw
sensor data from a multisensor activity monitor was collected during each of these
activities.
Main Outcome Measures
Two new EE prediction models including a general model and an activity-specific model
were developed using enhanced all-possible regressions on 36 MWUs and tested on the
remaining 9 MWUs.
Results
The activity-specific and general EE prediction models estimated the EE significantly
better than the manufacturer's model. The average EE estimation error using the manufacturer's
model and the new general and activity-specific models for all activities combined
was –55.31% (overestimation), 2.30% (underestimation), and 4.85%, respectively. The
average EE estimation error using the manufacturer's model, the new general model,
and activity-specific models for various activities varied from –19.10% to –89.85%,
–18.13% to 25.13%, and –4.31% to 9.93%, respectively.
Conclusions
The predictors for the new models were based on accelerometer and demographic variables,
indicating that movement and subject parameters were necessary in estimating the EE.
The results indicate that the multisensor activity monitor with new prediction models
can be used to estimate EE in MWUs with SCI during wheelchair-related activities mentioned
in this study.
Key Words
List of Abbreviations:
EE (energy expenditure), MAE (mean absolute error), MSE (mean signed error), MWU (manual wheelchair user), PA (physical activity), SCI (spinal cord injury)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: May 17, 2012
Footnotes
Supported by the Rehabilitation Engineering Research Center on Interactive Exercise Technologies and Exercise Physiology for Persons with Disabilities (grant no. H133E070029), funded by the National Institute on Disability and Rehabilitation Research; and by the VA Center of Excellence for Wheelchairs and Associated Rehabilitation Engineering (grant no. B3142C). The contents do not represent the views of the Department of Veterans Affairs or the United States Government.
No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit on the authors or on any organization with which the authors are associated. Farringdon is employed by BodyMedia Inc, manufacturer of the SenseWear.
Reprints are not available from the author.
In-press corrected proof published online on Jul 6, 2012, at www.archives-pmr.org.
Identification
Copyright
© 2012 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.
