Physiological and biomechanical comparison of overground, treadmill, and ergometer handrim wheelchair propulsion in able-bodied subjects under standardized conditions.
Rick de Klerk, Vera Velhorst, Dirkjan H E J Veeger and 2 others
PMID 33069257WHAT IT FOUND
For researchers testing wheelchair propulsion, lab treadmills and ergometers match overground results closely when speed and power are standardized.
Heart rate was higher overground, but most biomechanical differences were small and likely not functionally meaningful for clinical practice.
Key findings
01Heart rate was significantly higher during overground propulsion than during treadmill propulsion, likely due to environmental distractions and cornering effort.
02Push time and cycle time differed between modalities, with overground propulsion showing a longer cycle time than treadmill or ergometer propulsion.
03Most physiological and biomechanical variables showed moderate to good agreement between the three testing methods, with differences often too small to be clinically relevant.
STILL TO COME
How it was doneWhat they found
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What it does not show
Participants were able-bodied novices with no previous wheelchair propulsion experience, so results may not apply to experienced wheelchair users or patients with impairments. Despite standardization efforts, there was still within-subject variance in power output between conditions. Different forms of visual feedback (e.g., speed displays on the ergometer vs. none on the treadmill) may have influenced participant behavior and propulsion mechanics. The study did not measure kinematics (joint angles/movement patterns), which could explain some of the kinetic differences observed.
Declared interests
Funded by Samenwerkingsverband Noord-Nederland (NL) and Ministerie van Economische Zaken. No conflicts of interest declared by authors.
The easy way to misread this
Do not assume that lab-based treadmill or ergometer testing perfectly replicates overground propulsion for all metrics. Heart rate and timing variables differed significantly, meaning physiological load and propulsion rhythm may be underestimated or mischaracterized if using lab equipment without accounting for these specific modalities' limitations.