There is an entire science to maintaining your energy body in an optimum state, which I learned from Leonard Orr, who learned it from Babaji. Leonard would go to the foothills of the Himalayas in India every year, just to be instructed by Babaji. Babaji did not teach with words, he taught by example. So there isn’t much of this written down in books. You can’t even google it! This is part of the oral tradition, the “secret” teachings. They really have never been secret; it’s just that the oral tradition, the examples, the demonstrations are not understood by most because they lack the basic initiation into the felt sense of the energy body. So they don’t understand what they’re being shown. They don’t have “eyes to see and ears to hear”. Getting these beneficial practices out to more people is one of my major motivations.
Sacred Breath 