Fig. 1From: Optimisation of rocker sole footwear for prevention of first plantar ulcer: comparison of group-optimised and individually-selected footwear designs a Schematic to illustrate rocker angle (RA), apex position and apex angle. Apex position was varied by moving point A proximally or distally and a corresponding adjustment made to the position of point B to ensure a consistent rocker angle. b Example rocker shoe with RA = 20°Back to article page