The analytical method of determining the center of gravity of a person propelling a manual wheelchair

This paper presents analytical author's method for the determination of the location of center of gravity of human body determined on the basis of the photographic documentation. This method uses the projection of body position on two planes: sagittal and frontal which is a new approach, because previously methods were executed on living the human in a real time. Therefore, this method can be used to approximate mathematical description of the kinematic chain for all groups of anthropometric measurements. Measurements of the angles between segments of the body from the photographs in two planes and data from anthropometric atlas are sufficient for application of this method. The result of using described method is information how center of gravity position changes during propelling the manual wheelchair. The advantage of the presented method is that measurements of body segments lengths and angles between them are made without the need for the living organism. (C) 2017 The Authors. Published by Elsevier Ltd.