Fig. 3From: Effects of walking speeds and durations on the plantar pressure gradient and pressure gradient angleIllustration of the effect of walking speeds on the PPG and PGA. A 3 × 2 two-way ANOVA (3 speeds and 2 durations) showed that the speed factor caused a significant main effect of PPG in T1. B PPG in one-way ANOVA showed 1.8 mph were lower than 5.4 mph in T1 at 10 min and 20 min, and 1.8 mph were lower than 3.6 mph in HL at 20 min. C PGA in the one-way ANOVA showed 1.8 mph were higher than 3.6 and 5.4 mph in M1 at 20 min, and 1.8 mph were higher than 3.6 mph in M2 at 20 min. PPG, peak pressure gradient; PGA, pressure gradient angle; T1, first toe; M1, first metatarsal head; M2, second metatarsal head; and HL, heelBack to article page