Many believe the mantra "Om" to be the sound of the universe. Om is traditionally chanted at the beginning and end of yoga sessions. It is an acknowledgment that the universe around us is constantly moving—the setting sun, the rising moon, the ebb and flow of the tides, the beating of our hearts.
Ancient yogis used Om to recognize this never-ceasing movement and seek oneness with the universe. Chanting it is meant to resonate that movement throughout the breath, awareness and energy to reveal a more powerful connection with the universe.