Nadi Sodhana Pranayama is a breathing technique that cleanses the nadis or energy channels in the body. It involves alternately blocking one nostril while breathing in and out of the other nostril, completing one round. Regular practice of this pranayama balances the nostrils, cleanses the nasal tract, increases vitality, lowers the metabolic rate, boosts digestion, and reduces stress and anxiety by harmonizing the life force energies in the body. It can also benefit those with respiratory issues like asthma.