Finn Bojsen-Moller has written some classic articles on foot biomechanics over the years and here is one that I think everyone should read. Bojsen-Moller F: Calcaneocuboid joint and stability of the longitudinal arch of the foot at high and low gear push off. J Anat, 129:165-176, 1979
The rest is here:
Classic Bojsen-Moller: High Gear and Low Gear at Push Off