This gentle pranayama is said to cool the mind and emotions. You may notice that, at any given time, one nostril is dominant (that is, air flows more smoothly through one nostril and only partially through the other). The dominant nostril alternates throughout the day. Preliminary research suggests that breathing through the right nostril oxygenates the left side of the brain, while breathing through the left nostril oxygenates the right side of the brain. One of the reasons alternate nostril breathing may induce its calming and balancing effects on the mind is that it gently allows for airflow through both nostrils.
To practice, place the index and middle finger of the right hand on the center of the eyebrow, and place the thumb on the right nostril, and the ring finger and pinky on the left nostril. The left hand rests on the lap, palm facing up. Take a deep breath in and, closing the right nostril with your thumb, breathe out through the left nostril. Then take a deep breath in through the left nostril, close the left nostril with your ring finger and pinky at the end of the inhale, and exhale through the right nostril. Take a deep breath in through the right nostril and, closing the right nostril with the thumb, exhale on the left side, and start over. Do this with your eyes closed for about five minutes. Notice the effects on your body and mind.
De-Stressing & Breathing (1): Pythagorean Style
Breathing and De-Stressing (2): Change How You Feel By How You Breathe