(Pingalā Nāḍī): The “tawny energy channel.” It is the masculine, active, yang energy channel in the subtle body. It lies to the right of sushumna nadi, and its energy is complementary to that of ida nadi (the passive, feminine, yin channel that is to the left of neutral sushumna). Pingala nadi, also known as surya nadi, begins at a subtle level in muladhara chakra, goes along the back on the right side of the spine, and intersects with ida nadi in ajna chakra, the coordinator of polarity in the being.