Ground reaction force measurement during running using insoles with MEMS six-axis force sensors.

Abstract

In this study, the forces applied to the sole during walking, jogging, and running were evaluated using Shokkaku-shoes that are equipped with MEMS 6-axis force sensors and acceleration/gyro sensors in their insoles. The MEMS 6-axis force sensors were placed at the thenar, the hypothenar, and the heel, and the acceleration/gyro sensor was placed at the center of the sole. Measurements were conducted on an athletics track over approximately 30 m for each movement. The data were analyzed for the three axial forces at the thenar, the hypothenar, and the heel. Then, it was found that the vertical forces in the forefoot increased as the motion became close to running, and the ground contact time gradually became shorter. Only braking forces were observed in walking, and propulsive force was detected only in the jogging and running motion unlike the typical GRF measurements using force plates.