The Kundalini is untapped energy (prana) at the base of the spine that can be drawn up through the body awakening each of the seven chakras.
Focus on Breath and Movement is one of the main characteristic of a Kundalini class… each Kundalini Yoga asana series is done in conjunction with a specific breath that intensifies the effects of the poses with the purpose of freeing energy in the lower body and allowing it to move upwards. Kundalini sequences (called kriyas) may consist of rapid, repetitive movements done with breath or holding a pose while breathing in a particular way.
Kundalini yoga goes beyond the physical performance of poses with its emphasis on breathing, meditation, mudras and chanting.