plainpicture/Design Pics/Mark Jurkovic
Take a deep breath. In some forms of yoga and meditation, people are supposed to breathe in slowly through their nose. Now we may know why it’s helpful: nerves inside the nose start firing in a similar slow rhythm, prompting parts of the brain to do the same.
And in a test, people who did yoga with slow nasal breathing seemed to enter a deeper meditative state than when they did so breathing at the same rate through their mouths.
Brainwaves are the result of large groups of nerve cells firing rhythmically. …