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The purpose of this study was to determine the effect of ramp angle on slip potential at the feet during downward and upward gait. This was accomplished by investigating the relationship between the horizontal and vertical foot forces during gait as a function of ramp angle. A ramp was designed and built which incorporated a force plate. Foot forces were measured while subjects walked up and down the ramp. The ramp angle was varied from 0 to 20 degrees in 4 degree intervals. Normal forces were divided into the shear forces, thus calculating a 'required' coefficient of friction (RCOF) for the entire trial. The results showed shear forces increase both in magnitude and duration as ramp angle is increased.
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