Fig. 2
From: Effects of walking speeds and durations on the plantar pressure gradient and pressure gradient angle
Examples of PPP, PPG, and PGA at the 2nd metatarsal head in a representative participate. A PPP = 436 kPa and PPG = 37 kPa/mm. The PPP and PPG were not at the same point. B PPP was during the stance phase of gait. C PPG was during the stance phase of gait. D PGA was the angle change of the pressure gradient vector, which was instantaneous PPP more than half of the overall PPP. PGA = 17.5°. PPP, peak plantar pressure; PPG, peak pressure gradient; PGA, pressure gradient angle