Kriya Yoga is the union
or Yoga with the Infinite through a certain action or rite. The Yogi who
faithfully follows the technique is free from Karma and universal chain of
causation. Kriya yoga is a simple, psychophysical method by which the human
blood is decarbonised and recharged with oxygen. The atoms of this extra oxygen
are transmuted into life current to rejuvenate the brain and the spinal
centres. To know more read:http://www.indianetzone.com/19/science_kriya_yoga.htm