Like many forms of exercise, yoga asanas effectively stretch and strengthen your body. The greatest benefits of yoga asanas, however, come from their profound effects on the internal systems of the body. By bending, stretching, twisting, and flexing in the various postures, you bathe your internal organs with oxygenated blood and prana, also known as life force energy or chi. Yoga asanas soothe and tone your nerves and regulate the endocrine system, which is responsible for the production of hormones—one of the keys to both physical and mental health. They also improve digestion and elimination, strengthen the respiratory system, and tone the reproductive organs. Although yoga techniques like asanas, breathing, and relaxation are extremely effective in relieving stress, it is Yoga Sound meditation that relieves deep-seated stress and anxiety, enabling you to experience yoga's greatest gifts: spiritual happiness and inner peace.