The Symmetric Nature of the Position Distribution of the Human Body Center of Gravity during Propelling Manual Wheelchairs with Innovative Propulsion Systems

Objective: The main objective of the tests conducted was to analyze position variability human body’s center gravity during propelling wheelchair, and demonstrate properties enabling description this by means plane figures with a symmetry axis. A secondary show impact used manual propulsion type wheelchair inclination angle in relation on dimensions areas gravity. Method materials: Three patients participated research representing 50 centiles anthropometric dimensions. Each patient carried out fifteen measurement three wheelchairs for angles frame level. test consisted five cycles which positions were determined sampling frequency 100 Hz. measured approximated ellipses containing 95.4% measurements conducted, assuming their dimension scaling basis form double value standard deviation defined based registered results. Results: Based average values parameters nine cases variable its area highest multispeed transmission. ellipse semi-axis amounted 108.53 mm 29.75 b, x = 114.51 y ?10.53 mm, ? ?6.92°. lowest hybrid In case, 64.07 33.85 b; whereas, 245.13 ?28.24 ?0.56°.