Abstract Summary
This study aimed to determine the minimal amount of pressure sensors for the estimation accuracy of vertical ground reaction force (vGRF) in gait tasks. Ten healthy males walked and ran at self-selected speeds. Eight different layouts with different amounts of sensors (3-17 sensors) were established and used to measure pressures for the calculation of vGRF during stance phase of each gait trial. The force plate as the gold standard was used to measure vGRF concurrently. The Pearson’s correlation coefficient was applied to assess the correlation between the vGRF outcomes of each layout and of the force plate. Results showed that in both walking and running tasks, the correlation increased greatly between 5 and 7 sensors, and the plateau was reached at 11 sensors (all R values above 0.85). Therefore, it is suggested that estimating vGRF of gait tasks among healthy adults with 11-sensor layout is feasible.
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