How to read these graphs: blue data points represent voltages

How to read these graphs: blue data points represent voltages collected from heel sensors. The higher the voltage, the higher the
pressure. Red represents voltages collected from toe sensors. Graphs labelled "Gait" are one step; graphs labelled "Walk" are several
consecutive steps. All represented data was collected from the walking profile of one individual, Hugh Herr, a double below-theknee amputee and the supervisor of the Biomechatronics Lab.
Walk One