The foot is a masterpiece of design. Each foot has 26 bones, 100’s of ligaments, muscles and tendons. All of these components need to function with each other in a very precise way to ensure that we are able to walk, run and carry out a whole variety of actions. The foot is a finely tuned biomechanical masterpiece of design as it needs to co-ordinate all of the physiological structures so that it can function properly and without problems to undertake those actions. The foot did evolve to get those characteristics on a soft surface and not wearing shoes, so a number of defects probably crept in as feet was placed into shoes and was forced to walk and run on the hard concrete surfaces. Small imperfections that were not previously an issue did start to show up in those shoes and on those hard ground. It is this that is to blame for so many of the conditions that health professionals see in the foot nowadays.
For instance, one of those problems is a theory known as supination resistance. This is deemed as the force that's needed to raise the arch of the foot. If that force is high, then the muscles and tendons need to work harder and the ligaments have more strain on them. This might lead to pain in those structures and the development of a progressive flat foot. If this force is higher, walking and running also requires more energy and could be very tireing. If that supination resistance force is too low, then it will likely be very easy to raise the arch of the foot. This can result in more ankle sprains because it is so easy to tip the foot over to cause that. From this it should be clear that a fine balance is necessary between too much and too low amounts of force which is a great illustration of just what an engineering miracle the foot is and just how simple it is for something to go bad.