Figure 2

Plantar pressure image with arch calculation. Two tangents (t1,t2) were made by the software on either side of the foot (after removing toes), intersecting the foot perimeter at f1,f2, h1,h2. The forefoot line (f1-f2) and the heel line (h1-h2) were bisected, and the midfoot line connected the centres of these. Perpendiculars were drawn to the midfoot line at each end of the foot, and it was then divided into three equal sections, and two more perpendiculars then divided the foot into the forefoot, the arch and the heel.