Pranayama is a breath control technique in yoga that regulates the life force (prana) through inhalation, exhalation, and breath retention. The document describes eight common types of pranayama - Chandrabhedan, Suryabhedan, Anulom-Vilom, Bhastrika, Ujjayi, Sheetali, Sheetkari, and Bhramari - and provides the method and benefits of each type as well as any contradictions. Regular practice of pranayama is said to balance the nervous system, regulate energy flow through the body's nadi channels, and ensure longevity.