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What is the supination resistance of the foot?

The foot is a masterpiece of design. Each foot has 26 bones, 100’s of ligaments, muscles and tendons. Many of these structures must function collectively in a very precise way to ensure that we are able to walk, run and do a whole variety of activities. The foot is a finely tuned biomechanical masterpiece of design as it needs to co-ordinate all those anatomical structures so that it can function effectively and without problems to undertake those activities. The foot did evolve to have those functions on a soft surface rather than wearing shoes, so a few defects potentially crept in as feet was put into shoes and it was forced to walk and run on the hard cement surfaces. Small imperfections that were not previously a problem started to show up in those shoes and on those hard ground. It is this which is to blame for so many of the problems that health professionals see in the foot today.

For example, one of those issues is a idea referred to as supination resistance. This is thought of as the force that's required to lift the arch of the foot. If this force is higher, then the muscles and tendons must work harder and the ligaments have more stress on them. This can lead to pain in those structures and also the development of a progressive flat foot. If this force is large, running and walking also needs more effort and could be really tireing. If that supination resistance force is too low, then it is going to be easy to raise the arch of the foot. This could result in more ankle sprains as it is really easy to tip the foot over to cause that. From this it ought to be apparent that a fine balance is needed between too high and too low amounts of this force which is a good illustration of precisely what an engineering wonder the foot is and just how easy it is for something to go bad.