Maintaining the lordosis
You have just learned how to find the extreme of the good sitting posture. It is not possible to sit in this way for long periods, because it causes considerable strain and, if maintained for excessive periods, might actually cause pain. To sit comfortably and correctly, you must sit in a way that is not as upright as the position of extreme good posture. To find the correct position, you must first sit with your lower back in extreme lordosis and then release the last 10 percent of the lordosis strain. At the same time, take care to ensure that you do not allow the lower back to flatten
Now you have reached the correct sitting posture, which can be maintained for any length of time. When sitting like this, you maintain the lordosis of the lower back with your own muscular effort. It requires constant attention and constant effort, and you cannot fully relax. And whenever you sit on a seat without a back, you must sit in this way.
