Healthy individuals are more maneuverable when walking slower while navigating a virtual obstacle course.
Katherine L Hsieh, Riley C Sheehan, Jason M Wilken and 1 others
PMID 29494819WHAT IT FOUND
Healthy adults were more maneuverable and made fewer errors when navigating lateral obstacles at a slower walking speed.
They achieved this by narrowing their step width and adjusting their center of mass, suggesting slower walking aids rapid directional changes.
Key findings
01Participants made fewer unsuccessful transitions at the slower speed during the reaction condition.
02At the slower speed, participants exhibited smaller margin of stability and narrower step widths on the ipsilateral side, indicating greater maneuverability.
03Participants exited their lane faster at the typical speed than at the slow speed in both conditions.
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 included only 15 young, healthy adults, so findings may not apply to older adults or those with gait impairments. Participants had more time to complete transitions at the slower speed, which may explain the improved performance independent of the biomechanical changes. The virtual environment was constrained to four lanes, and the 'reaction' condition was not entirely unpredictable due to lane probabilities. High variability in stepping strategies was observed, and the study did not constrain how participants executed the maneuvers.
Declared interests
The authors declare no conflicts of interest. The study was supported by NIH and DOD, but the sponsors were not involved in the design, analysis, or writing.
The easy way to misread this
Do not assume that slower walking is universally 'more stable' or safer. The study found that slower walking actually reduced stability metrics (narrower base of support, smaller margin of stability) to facilitate maneuverability. In impaired populations, this reduced stability might increase fall risk rather than improve navigation.