Based on the linked source; automatically prepared and checked against the original report.
Study Design
The research examined a transformable, lever-propelled stair-climbing wheelchair through subjective usability ratings and biomechanical measurements. Anthropometric data from 20 male participants informed design parameters. Nine participants, including two with paraplegia, completed a simulated urban course involving a 5° ramp, a 90° turn and narrow passages. Seven healthy participants took part in testing three ergonomic factors during stair-climbing operations.
Usability Findings
The ramp and sharp turn were the most difficult tasks, which the study associated with the wheelchair’s 65-kilogram mass and approximately 1,450-millimeter turning radius. Driving control received the highest rating at 6 out of 10, while comfort received the lowest rating, attributed in the study summary to the tilted seat design. The findings come from a pilot assessment rather than a full review.
Muscle-Activation Results
Surface electromyography assessed four upper-limb muscles. A straight torso position reduced measured muscle strain, especially in the brachioradialis. A lever distance near 50 millimeters and neutral-to-slightly supinated orientation supported lower muscle effort. The study identified approximately 37.5 millimeters, 0° torso angle and 15° orientation as its preferred parameter combination, while calling for lighter construction, improved maneuverability, adjustable seat tilt and larger, gender-diverse validation studies.
