954.
Rhagavad-yitā  As It is
Цог 4
apāne juhvati prānaṁ prāṇe pānaṁ tathāpare prāṇāpāna-gatī ruddhvā prāṇāyāma-parāyaṇāḥ apare niyatāhārāḥ prānān prānesu juhvati
apāne —air which acts downward;  juhvati —offers;  prāṇam —air which acts outward;  prāṇe —in the air going outward;  apānam —air going downward;  tathā —as also;  apare —others;  prāṇa —air going outward;  apāna —air going downward;  gatī —movement;  ruddhvā —checking;  prāṇāyāma —trance induced by stopping all breathing;  parāyaṇāḥ —so inclined;  apare —others;  niyata —controlled;  āhārāḥ —eating;  prāṇān —outgoing air;  prāṇeṣu —in the outgoing air;  juhvati —sacrifices.
TRANSLATION
And there are even others who are inclined to the process of breath restraint to remain in trance, and they practice stopping the movement of the outgoing breath into the incoming, and incoming breath into the outgoing, and thus at last remain in trance, stopping all breathing. Some of them, curtailing the eating process, offer the outgoing breath into itself, as a sacrifice.
PURPORT
This system of  yoga  for controlling the breathing process is called  prāṇā-yāma , and in the beginning it is practiced in the  haṭha-yoga  system through different sitting postures. All of these processes are recommended for controlling the senses and for advancement in spiritual realization. This practice involves controlling the air within the body to enable simultaneous passage in opposite directions. The  apāna  air goes downward, and the  prāṇa  air goes up. The  prāṇāyāma yogī  practices breathing the opposite way until the currents are neutralized into  pūraka , equilibrium. Similarly, when the exhaled breathing is offered to inhaled breathing, it is called  recaka . When both air currents are completely stopped, it is called  kumbhaka-yoga . By practice of  kumbhaka-yoga , the  yogīs  increase the duration of life by many, many years. A Kṛṣṇa conscious person, however, being always situated in the transcendental loving service of the Lord, automatically becomes the controller of the senses. His senses, being always engaged in