This Pranayama also known as Anulom Vilom or Nadishuddhi Pranayama. The main characteristics feature of this Pranayama is the alternate breathing through the left and right nostril with your without Kumbhak.
Many of us may not be aware of the fact that we breath mostly through only one nostril at a time and even the force of breathing is also not equal for both the nostrils.
Left nostril known as Ida Nadi or Chandra Nadi, right nostril known as Pingle Nadi or Surya Nadi.
The soothing effect of this Pranayama on the nervous system reduces various emotional tensions and one feel relaxed and light.
Calmness and mental relaxation are easily felt immediately after the practice of this Pranayama.
This Pranayama has also been reported to improve the function of digestion and sleep.