Abstract
Objective
To develop and evaluate energy expenditure (EE) estimation models for a physical activity
monitoring system (PAMS) in manual wheelchair users with spinal cord injury (SCI).
Design
Cross-sectional study.
Setting
University-based laboratory environment, a semistructured environment at the National
Veterans Wheelchair Games, and the participants' home environments.
Participants
Volunteer sample of manual wheelchair users with SCI (N=45).
Intervention
Participants were asked to perform 10 physical activities (PAs) of various intensities
from a list. The PAMS consists of a gyroscope-based wheel rotation monitor (G-WRM)
and an accelerometer device worn on the upper arm or on the wrist. Criterion EE using
a portable metabolic cart and raw sensor data from PAMS were collected during each
of these activities.
Main Outcome Measures
Estimated EE using custom models for manual wheelchair users based on either the G-WRM
and arm accelerometer (PAMS-Arm) or the G-WRM and wrist accelerometer (PAMS-Wrist).
Results
EE estimation performance for the PAMS-Arm (average error ± SD: −9.82%±37.03%) and
PAMS-Wrist (−5.65%±32.61%) on the validation dataset indicated that both PAMS-Arm
and PAMS-Wrist were able to estimate EE for a range of PAs with <10% error. Moderate
to high intraclass correlation coefficients (ICCs) indicated that the EE estimated
by PAMS-Arm (ICC3,1=.82, P<.05) and PAMS-Wrist (ICC3,1=.89, P<.05) are consistent with the criterion EE.
Conclusions
Availability of PA monitors can assist wheelchair users to track PA levels, leading
toward a healthier lifestyle. The new models we developed can estimate PA levels in
manual wheelchair users with SCI in laboratory and community settings.
Keywords
List of abbreviations:
EE (energy expenditure), G-WRM (gyroscope-based wheel rotation monitor), ICC (intraclass correlation coefficient), MSE (mean signed error), PA (physical activity), PAMS (physical activity monitoring system), 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: March 11, 2016
Footnotes
Supported by the Department of Defense (grant no. W81XWH-10-1-0816); the Switzer Research Fellowship (grant no. H133F110032), awarded by the National Institute on Disability and Rehabilitation Research, Department of Education; and the Human Engineering Research Laboratories, Veterans Affairs Pittsburgh Healthcare System. The contents do not represent the views of the Department of Veterans Affairs or the United States Government.
Disclosures: none.
Identification
Copyright
© 2016 by the American Congress of Rehabilitation Medicine
