Journal article
Accelerometer output and its association with energy expenditure during manual wheelchair propulsion
Spinal Cord, Vol.54(2), pp.110-114
2016
Abstract
Study design: This is an experimental design.
Objectives: This study examined the association between rates of energy expenditure (that is, oxygen consumption (VO 2)) and accelerometer counts (that is, vector magnitude (VM)) across a range of speeds during manual wheelchair propulsion on a motor-driven treadmill. Such an association allows for the generation of cutoff points for quantifying the time spent in moderate-to-vigorous physical activity (MVPA) during manual wheelchair propulsion.
Setting: The study was conducted in the University Laboratory.
Methods: Twenty-four manual wheelchair users completed a 6-min period of seated rest and three 6-min periods of manual wheelchair propulsion on a motor-driven wheelchair treadmill. The 6-min periods of wheelchair propulsion corresponded with three treadmill speeds (1.5, 3.0 and 4.5 mph) that elicited a range of physical activity intensities. Participants wore a portable metabolic unit and accelerometers on both wrists. Primary outcome measures included steady-state VO 2 and VM, and the strength of association between VO 2 and VM was based on the multiple correlation and squared multiple correlation coefficients from linear regression analyses.
Results: Strong linear associations were established between VO 2 and VM for the left (R=0.93±0.44; R 2 =0.87±0.19), right (R=0.95±0.37; R 2 =0.90±0.14) and combined (R=0.94±0.38; R 2 =0.88±0.15) accelerometers. The linear relationship between VO 2 and VM for the left, right and combined wrists yielded cutoff points for MVPA of 3659 ±1302, 3630±1403 and 3644±1339 counts min -1, respectively.
Conclusion: We provide cutoff points based on the linear association between energy expenditure and accelerometer counts for estimating time spent in MVPA during manual wheelchair propulsion using wrist-worn accelerometry. The similarity across wrist location permits flexibility in selecting a location for wrist accelerometry placement.
Details
- Title
- Accelerometer output and its association with energy expenditure during manual wheelchair propulsion
- Authors/Creators
- Y.C. Learmonth (Author/Creator) - University of Illinois Urbana-ChampaignD. Kinnett-Hopkins (Author/Creator) - University of Illinois Urbana-ChampaignI.M. Rice (Author/Creator) - University of Illinois Urbana-ChampaignJ.L. Dysterheft (Author/Creator) - University of Illinois Urbana-ChampaignR.W. Motl (Author/Creator) - University of Illinois Urbana-Champaign
- Publication Details
- Spinal Cord, Vol.54(2), pp.110-114
- Publisher
- Nature Publishing Group
- Identifiers
- 991005540785407891
- Copyright
- © 2016 International Spinal Cord Society
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 1 Clinical & Life Sciences
- 1.82 Gait & Posture
- 1.82.1298 Spinal Cord Injury Rehabilitation
- Web Of Science research areas
- Clinical Neurology
- Rehabilitation
- ESI research areas
- Neuroscience & Behavior