Comparison of Simulated Physical Load of Sidewalk Curb for Electric, Manual Wheelchair Users and Visually Impaired People

Abstract

Physical activity, depending on work load as well as work environment, is modulated by Electrocardio-vascular activity. Activity of an electrocardiogram (ECG) may be associated with the physical load of moving for people with mobility handicaps in use of wheelchairs. The aim of this study is to investigate the relationship of ECG activity with the physical load of electric and manual wheelchair users and visually impaired people when crossing a main road with difficult access to high sidewalks. Eight voluntary students participated in the study. R-R interval times of heart beats were continuously recorded for each session of manual/electric wheelchairs and visually impaired. Experimental road conditions included places where there was a 0 cm to 10 cm drop or a steep step at both sides of the road. It is concluded that electric wheelchairs can provide stable driving for their users under conditions where there are differences in height between sidewalk and road, which are common obstacles for the users of wheelchairs. Furthermore, the influences of the sidewalk curb on heart beats when changing the method of transportation with difference conditions of curb are discussed. In addition, it was found that there are different influences of the curb heights on wheelchair users and visually impaired people.