Even if you are fit form your body but not mentally then according to ayurveda you are ill. In nada yoga, a person should focus on anahata nada, or inaudible sounds. It is the sound that is found within the body, rather than heard with the ear. Nada yoga may also include the use of chants.
Many people get positive result after this ayurveda treatment and feel increased awareness, mental focus, relaxation and internal body peace who regularly mediate. This type of meditation releases your positive energy and controls negative thoughts.