It is hard to recall my first yoga class over decade ago, but I do recall a vague sense of unease before class and later reservations about joining in on the chanting.

After a lifetime of dancing, I stowed away my ballet shoes for college and yoga seemed like an interesting way to stay limber and fit. I was as type A as they come. I wanted to move, to sweat, and even to perform.

To my surprise, I found myself sitting on the floor uncomfortable as could be physically, but more so mentally. My mind was a constant whirlwind and meditation was a novel form of torture. And then the OMing started.

I didn’t know what it meant and it felt a bit cultish to me. On the other hand there was something about the reverberating vibration was deeply beautiful and moving. Part of me wanted to join, part of me was a little weirded out, and part of me timidly recalled my fear of singing in public.

The next class, I resolved to try. It was kind of fun and a bit freeing—like screaming under the train tracks, and oddly competitive. It seemed everyone wanted to Om the longest and the loudest.

In efforts to ease some tensions that others may have about this tradition, I thought I’d explain what Om means and why we do it.

Om has many meanings and many layers. In teacher training my teacher defined Om “as the most ancient and scared mantra” or the “sound of the universe.” In Hinduism it can loosely be understood as the sound of creation. Similar to Christian beliefs, they believe the universe arose out of a void. Life was preceded by the manifestation of consciousness or God as the sound Om.

Om can also be understood as a scared trinity. It is the union of the energies of creation, preservation, and destruction (sometimes called liberation because often we must destroy something before it can be created or built anew).

In Sanskirt, the language of yoga if you will, the syllable Om is called Parnava and is literally translated to “humming.” Pra comes from the root word prakriti which means nature or can be loosely understood as the universe. Nava means boat. Thus Om is the boat that carries you through the ocean of life or consciousness to reach the shores of external truth or self actualization (Shiva Purana 1.17.4).

So why do we do we Om at the beginning and end of class?

The go to answers that you may have heard in class are that it:

1. Helps cleanse the space.

2. Serves to “align body, mind and sprit.” As open as I am to such esoteric and spiritual parts of yoga, the scientist in me likes to base my understanding in tangible evidence or experience whenever possible. So let us return to the physical and the practical.

3. At the most basic level it is thought that the vibrations produced by Oming, break up mucous in the lungs and help expel dust or microogamsims from the respiratory tract. Similarly this is why we cough when sick. Not the most glamorous of purposes, but practical during the cold and flu season.

4. Oming may help you help you relax and improve your mood. One study showed the Oming may help us tap into our parasympathic nervous system by activating the Vegus Nerve.

They found that healthy volunteers had decreased activity in most of the limbic system, which is a network of structures in the brain that regulates emotions. These brain regions control a lot of our primal emotions and can be hyperactive in depression and anxiety and the authors suggest that Oming may have some therapeutic potential in these disorders.

This is interesting, because a similar pattern is produced when an electrode is used to stimulate the Vegus Nerve. This stimulation is a way of “forcing” the body into a parasympathetic (rest & digest) response. Some researchers think that the physical vibration produced by Oming might stimulate the Vegus Nerve to generate a relaxation response.

Read the rest at Elephant Journal here