Yogic method using pranayam.
Prāṇāyāma (Sanskrit: prāṇāyāma) is a Sanskrit word meaning "extension of the prāṇa or breath" or "extension of the life force". The word is composed of two Sanskrit words: prana, life force, or vital energy, (noted particularly as the breath), and ayāma, to extend or draw out. (Not "restrain, or control" as is often translated from yam instead of ayāma). It is a yogic discipline with origins in ancient India.
Example via www.ramdass.org: Featured Teacher: Dr. Robert Svoboda