Abstract
We investigated how the velocity of walking, jogging and running affects the 3-axis stress distribution at a human sole by using the measurement system assembled previously from eight MEMS 3-axis force sensors, amplifier boards and wireless communication module. The velocity was determined by using a treadmill and changed from 2km/h to 16km/h by 2km/h. In each condition, a series of 3-axis stress distribution data that corresponds to 30 steps on one foot was acquired. Peak value at each axis in each sensor position was evaluated from the waveform of every step, and the average of peak values was calculated in each condition of velocity and plotted in graphs. As plotted data were discontinuous between the velocity of 6km/h and 8km/h, they can be divided into two groups, walking group and jogging/running group. I both groups, there are strong correlations between the velocity and the average of peak values at each axis in each sensor position.
