Highlights
- •The oxygen cost of walking was reported as an independent factor for functional independence.
- •This association appears to be primarily determined by walking speed and not oxygen consumption.
- •These results emphasize the importance of evaluating and acting on self-selected walking speed to improve the functional independence of individuals with stroke.
Abstract
Objective
To evaluate the association between self-selected walking speed (Sfree), oxygen consumption at Sfree (Vo2free), the oxygen cost of walking (Cw) at Sfree, and mobility independence and independence for activities of daily living in individuals
poststroke.
Design
Cross-sectional study.
Setting
Hospital.
Participants
Individuals with stroke who were able to walk without human assistance were included.
We included 90 individuals (N=90; mean age, 63.5±14.0y).
Interventions
Not applicable.
Main Outcome Measures
Cw was captured during walking from measurements of Sfree and Vo2free. We assessed mobility independence based on the modified Functional Ambulation Classification
(mFAC) and independence in activities of daily living by the Barthel Index (BI). Multiple
linear regression analyses were performed to evaluate the independence of Cw, Vo2free, and Sfree from the determination of BI and mFAC among the various characteristics of the population
(age, stroke delay, body mass index, motor function, spasticity).
Results
We reported Cw=0.36 mL/kg/m (interquartile range [IQR]=0.28 mL/kg/m), Sfree=0.60±0.32 m/s, Vo2free=11.2 mL/kg/min (IQR=1.8 mL/kg/min). The multiple linear regression analyses showed
that Cw and Sfree were independently associated with the BI (P<.01) and the mFAC (P<.01) scores. Vo2free was not found to be an explanatory variable of functional independence (P>.05).
Conclusions
Cw was independently associated with functional independence. This association appears
to be primarily determined by Sfree and not Vo2free, underscoring the importance of evaluating and acting on Sfree to improve the functional independence of individuals with stroke.
Keywords
List of abbreviations:
ADL (activities of daily living), BI (Barthel Index), BMI (body mass index), Cw (oxygen cost of walking), IQR (interquartile range), MAS (modified Ashworth Scale), mFAC (modified Functional Ambulation Classification), Sfree (self-selected walking speed), Vo2 (oxygen consumption), Vo2free (oxygen consumption at self-selected walking speed)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: February 19, 2021
Footnotes
Supported by the region of Nouvelle-Aquitaine and the laboratory of clinical research HAVAE (Handicap, Aging, Autonomy, Environment).
Disclosures: none.
Identification
Copyright
© 2021 by the American Congress of Rehabilitation Medicine
