Indeed, the child calms down faster when he feels the embrace of a native person and a state of light weightlessness - his usual state when he was still in the womb. So mom, intuitively understanding the laws of the universe, can quickly calm the child, shaking his hands, catching the right rhythm. The same approach has a beneficial effect on the baby when we shake him in a wheelchair, and hanging cradle allows you to simulate the state of light weightlessness, swaying smoothly in all directions.
In a state of light weightlessness, the child is easier to tolerate adaptation to gravity, after 9 months of life and development in the amniotic fluid in the womb. In addition, the first weeks of the baby's life are incredibly important, because at this time laid the fundamental features of the vestibular apparatus. It is rocking the cradle, we adjust the rhythm of the baby's organs, then accelerating, then slowing the amplitude. According to the mood of the child, each of the parents will understand what kind of rhythm the child likes, because his crying and whims will be replaced by such a native "AGU" and a sound sleep. And even in sleep, the rocking, the child develops the vestibular apparatus and movement coordination.