Ida Nadi (Lunar Channel)

Iḍā means "comfort" or "earth" in Sanskrit. It is one of the three main Nadis (Ida, Pingala, Sushumna), flowing along the left side of the spine and associated with the left nostril. It governs lunar energy (cooling, receptivity, feminine principle, relaxation).

Associated with the parasympathetic nervous system, it calms the mind and body, promoting relaxation. When Ida Nadi is dominant, one feels introspective, creative, and serene.

In Nadi Shodhana (Alternate Nostril Breathing), breathing through the left nostril is explained to activate Ida Nadi. Emphasized in asanas and breathing techniques that promote relaxation and deepen meditation. Instructors highlight the calming effect of breathing through the left nostril.