In Hindu thought, flow of life energy existing with in everyone.
It is believed to lie coiled at the base of the spine, and by the practice of Kundalini
yoga can be raised from the first chakra (centre of spiritual power) step by step
to the seventh chakra at the top of the skull, burning away obstacles on the
spiritual path.
 

As the literature of Kashmir Shaivism kundalini is
described in three different manifestations. The first manifestation is as the
universal energy or para-kundalini. The second manifestation is as the
energizing function of the body-mind complex or prana-kundalini. The third one
is as consciousness or shakti-kundalini which simultaneously subsumes and
intermediates between these two. Ultimately these three forms are the same but
understanding these three different forms will help to understand the different
manifestations of kundalini.

The purpose of Kundalini Yoga is to control and
overcome our base motivations and transcend the ego. Kundalini
Yoga is a holistic practice and philosophy that brings personal benefits of
rejuvenation and healing. Kundalini Yoga developed as a
systematic method of expanding consciousness and maintaining the new awareness.
Of particular importance is the strengthening of the nervous system to handle
an increased frequency of current. Without this right development and guidance
many people experience identity crisis and nervous breakdowns without knowing
the real nature of the problem. There are different types sources on Kundalini yoga are
available with yogabestbuy.com like

Kundalini Yoga - The Complete Set of 6 DVDs - Nirvair
Singh Khalsa

Kundalini Yoga for Athletes - DVD - Nirvair Singh Khalsa

An Introduction to Kundalini Yoga and Chanting DVD

Add Grace and Prosperity with Kundalini Yoga - DVD-
Nirvair Singh Khalsa

Kundalini Yogi has both Bhukti means enjoyment and Mukti means
liberation in the literal sense. So this Kundalini Yogi is claimed to be the
foremost of all Yogas. "Kundalini is the energy of the Divine as it is
experienced in the individual. Kundalini binds us when we project its energy
into the world and yet, Kundalini liberates us when we return this energy to
its divine origin."

To understand the movement of Kundalini better, you must
have adequate knowledge of the Nervous System, particularly the spinal cord.
This is because the Seven Chakras are believed to be found in this area of the
body. A happier life can be ours. We can stimulate creativity, increase mental
energy, heighten concentration and experience greater joy with Kundalini Yoga.