Just to add to what Xan said...trying to force Kundalini energy through yogic practices is unnecessary and also could be DANGEROUS if attempted without proper guidance. In the presence of one who has it awakened, it can arise spontaneously, naturally and perfectly safely, if the desire in recipient is great and their heart is pure and they have been doing things of a devotional nature. It really only becomes unsafe when forced.
The analogy Sri Vasudeva gives is of power transformers that step down the high voltage so that energy enters your home safely so you can switch on lights and things. So too, the energy of the entire universe needs to come through you gradually as your transformers (chakras) open, develop and stabilize. If you tried to make a direct connection without the proper equipment, you'd blow up your house.