In the entire field of spirituality there was no concept like kundalini yoga. Yoga is the broad precept indulging in which human beings finally gained enlightenment in their lifetime, became a Mahavira, Gautama Buddha Jesus Christ or Prophet Mohammed in their lifetime.
For human beings to successfully engage in spirituality detailed in Bhagavad Gita full activation of kundalini is necessitated. Only then dormant lying portions of brain activated fully.
Normal human beings use their brain a maximum of 1 to 2% the remaining always lying dormant. Enlightened ones like Mahavira, Gautama Buddha even Jesus Christ and Prophet Mohammed after reaching state of enlightenment used their brain 100%.
Full kundalini awakening means our brain becoming 100% active. To reach this state human beings need practicing absolute celibacy (eradicating flow of negative thoughts to our brain in totality) for a period of 12 years in continuation. Mahavira did it and so did Gautama Buddha. Even Jesus Christ indulged in 12 years practice of absolute celibacy and so did Prophet Mohammed.
Practice of absolute celibacy is an absolute must for full awakening of kundalini shakti. None in this world can bypass this requirement of path of spirituality.
Kundalini awakening can be indulged any given moment of life. Practice of absolute celibacy likewise can be indulged any given moment of life. Even while walking, jogging, swimming, going to school, indulging in sports, even at work one could indulge in absolute celibacy most of time. Indulging in absolute celibacy is a mental process that requires mental cleansing and this could be attempted any given moment of life as available.
If our goal of life is not spiritual, reaching God in present life time we must never indulge in kundalini awakening ever.