The ancient masters have highly developed the science of postures. Unfortunately, just a fragmented knowledge about this wisdom reaches our times through the Hindu people, but its true meaning is not grasped because currently people makes the mistake of analyzing everything separately and do nor look for relations with the Unity.
The noble upright posture, acquired by men after millennia, is an emblem of his evolutionary state, distorted at present by usual human postures, curved and asymmetric, which faithfully reflect human depressions, limitations and disharmonies.
A right placement of the spinal column depends entirely upon a higher perfection grade in postures. Many ancient postures have been devised in such way that during their practice are forcing the spine to its right position.
In natural human postures, the spinal column should form a line with very light undulations, but usually in most men convexity more or less marked in their backs can be found on the upper area of the spine (chyphosis).
Once you expanded the movement of the spine with exercises of straightening, you should practice the following exercise, which makes your spine more flexible and dynamic, and that at the same time is the synthesis of every natural movement of the spine.
First, the three main postures shall be considered since at every moment we are assuming one of them, that is, the standing, seated and lying down posture. We got so much used to pass from one to another posture, or to remain for hours in certain posture, that we have lost any critical sense to notice if our present posture is correct or not.
In this posture, the weight of the body remains evenly distributed on both legs. Feet remain parallel and somewhat apart (20 to 30 centimeters). The trunk remains naturally upright, arms pending freely at both sides and head supported by the least possible effort from the neck.
Most likely, our ordinary seated posture is a legacy from the ancient Egyptians, who exalted and perfected it to the utmost. The cultural level of a people, or of an individual, is proportional to his concern for perfecting little daily habits.
The fundamental difference between vegetative posture seated and mental posture is again its reduced support point. In fact, heels are together in this position; so, knees come close and even can join together.