positive and negative energy
The relation of different exercises and sounds are related to the positive and negative energy that makes up the bodys nervous system, sometimes called the positive and negative chi/ki flow.
When examining the kotodama, the sounds of the universe that affect movement, and many healing practices, we find that polarity of the natural body is different in men and women.
Hence, with the healing sounds, the practices of martial arts, and even examining the different areas of the body that generate different polarities of energy, you will find affecting stimuli that causes healing, increased power to the muscular action, or even vibrations that seem to cause different levels of conciousness such as yoga practice with sound.
After reading more than fifty books about yoga, a hundred books about martial arts, and then experiencing pressure point knock outs while using accupressure to sooth my aches and pains, I am a believer in using proven techniques to increase health, wellbeing, and sometimes increase strength of movements with sounds.
Left and right?
Find out why some strikes or movements are more effective due to the bodys polarity, and then you will find most of the answers you seek.