In yoga, amongst other practices, focusing on a particular point is recommended in order to improve concentration.
For example, if the aim of a practitioner is to relax and to gain optimum physical benefit, it is necessary to concentrate the mind on a specific region of the body, or on the breath, to experience the full effect of a particular practice, and to intensify the benefits.
Sometimes psychic centers, body channels or regions are used as the object of focus for spiritual concentration.
Physically, chakras are associated with the major nerve plexuses and endocrine glands in the body.