An estimation of the force for lifting the buttocks at seat-off based on the plantar information

The purpose of this research was to estimate the force for lifting the buttocks at seat-off based on the plantar information. First, we estimated the time of seat-off and calculated force for lifting the buttocks at seat-off from data gathered in a standing-up experiment using our pressure measurement system. Second, we measured force for lifting the buttocks at seat-off by means of a pull force measurement setup. Then, we compared the calculated and the measured forces for lifting the buttocks at seat-off The results were as follows: 1) the time of seat-off was almost identical to the time when the vertical reaction force was largest, and 2) the calculated force for lifting the buttocks at seat-off was almost equal to the measured force for lifting the buttocks at seat-off We believe that the force for lifting the buttocks at seat-off can be estimated from the plantar information.