The foot is a marvel of design. Each foot has 26 bones, 100’s of ligaments, muscles and tendons. All of these components have to function together in a very precise way so that we can easily walk, run and carry out a whole range of actions. The foot is a finely tuned biomechanical work of art as it needs to co-ordinate all those anatomical structures so that it can function properly and effortlessly to undertake those activities. The foot did evolve to have those characteristics on a soft surface rather than wearing footwear, so a number of defects probably crept in as feet was put into footwear and was forced to walk and run on the hard cement surfaces. Small faults which were not previously a problem began to show up in those shoes and on those hard ground. It is this that is responsible for so many of the problems that health professionals see in the foot nowadays.
For example, one of those issues is a theory called supination resistance. This is deemed as the force that's required to lift the arch of the foot. In the event that force is higher, then the muscles and tendons have to work harder and the ligaments have much more stress on them. This can lead to pain in those structures and the development of a progressive flat foot. If this force is high, walking and running also requires more energy and can be very tireing. If that supination resistance force is too low, then it will probably be an easy task to raise the arch of the foot. This can result in more ankle sprains since it is really easy to tip the foot over to cause that. From this it should be apparent that a fine balance is necessary between excessive and too low amounts of force which is a good illustration of precisely what an engineering masterpiece the foot is and just how easy it is for something to go wrong.