Fig. 1From: Effects of walking speeds and durations on the plantar pressure gradient and pressure gradient angleExamples of PPP (A) and PPG (B) in a representative participator at four plantar regions are defined. PPP, peak plantar pressure; PPG, peak pressure gradient; T1, first toe; M1, first metatarsal head; M2, second metatarsal head; and HL, heelBack to article page