Mediolateral damping of an overhead body weight support system assists stability during treadmill walking.
M Bannwart, S L Bayer, N König Ignasiak and 3 others
PMID 32778127WHAT IT FOUND
Adding mediolateral damping to a body weight support system increased walking stability in healthy adults.
This software-based support reduced side-to-side sway and variability without requiring physical rails or walkers, potentially allowing earlier gait training for patients with balance impairments.
Key findings
01Mediolateral damping significantly reduced side-to-side sway and variability compared to free walking and transparent body weight support.
02Direct measures of global stability, such as margins of stability, did not show a coherent response to the damping.
03Participants appeared to use compensatory movements to counteract the damping limits, suggesting the effect may mask true stability gains.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study was conducted on healthy young adults, so the findings may not generalize to patients with neurological impairments or balance deficits. Results were obtained on a treadmill, which does not fully replicate overground walking dynamics. The center of mass was approximated using pelvic markers rather than a full-body model, which may affect accuracy. Participants may have adopted compensatory movement strategies to deal with the damping, which could mask the true effect on stability. The study did not measure muscle activity (EMG), so it is unclear how neuromuscular control adapted to the support.
Declared interests
Funded by Innosuisse (Swiss Agency for Innovation Promotion) and Balgrist Campus AG, SCMA.
The easy way to misread this
Do not assume this proves the system improves stability for patients with balance impairments. The study was performed on healthy adults on a treadmill, and the observed stability gains may be partly due to compensatory movements by the participants rather than a direct improvement in balance control.