Posturology is a recognized specialty that studies mechanisms for managing equilibrium and its dysfunction. Indeed, far from being anatomically obvious, maintaining standing is a true neurophysiological feat for man. In order to achieve this, he has developed a postural regulation system whereby he can, standing despite external constraints, orient himself in space and adjust his movements with precision. At every moment this system ensures that the posture adopted is as close as possible to an ideal reference, energy-efficient and perfectly symmetrical in terms of muscle contractions. A bad posture, whatever its origin, is therefore more energy-intensive and inevitably generates muscle contractions, asymmetric, unnecessary and often painful.

The postural control system uses information transmitted by many sensors located throughout the body to inform the brain of the nature of the environment and allow it to adapt the work of each muscle so that the standing station or the walk are done in the best conditions. In this complex system, the eye and the foot are major entrances to postural regulation. A lack of foot positioning (valgus, varus...) or a slight eye divergence will thus create an imbalance of postural muscle chains and consequently a change in posture (rotation of shoulders, swing of the basin... ) Numerous pathologies (lumbar, cervical, joint, muscle, headache, dizziness...) which will be the consequence and not the cause of a bad posture will then appear.

The main objective of the podologist will be, after careful analysis of the patient’s static (too forward , too right, basin swing, inclined head ...) to give him a position close to the absolute vertical (postural invariant) . This postural reprogramming will take place thanks to the use of so-called "posture" soles. These are custom-made plant orthotics with components not exceeding 3 mm thick. These fine holds act as "sensory decoys" that, by stimulating pressure sensors under which they are placed, instruct the brain to adjust the muscle tone according to the stimulations received. Stimulation holds are chosen to rebalance muscle contractions in order to refocus the patient. The latter adopts a new, more comfortable posture, free of interference. However, a perfect posture can only be achieved when the various organs that make up the postural regulatory system are fully functional. This is why it is not uncommon for the podologist to refer the patient to an ophthalmologist, dentist or osteopath after his clinical examination.