Whistling has many health benefits, including boosting lung strength, changing circulation, relaxing, and stimulating the Vagus nerve (by puckering the lips). The nerves in the tongue activate the higher glands such as the thyroid or parathyroid.
This kriya promotes calmness and disease-resistance by improving elimination, strengthening the nervous system, improving endurance, and strengthening the heart.
In Kundalini Yoga it is often said that age is measured by the flexibility of the spine: to stay young, stay flexible. This series works systematically from the base of the spine to the top. All 26 vertebrae receive stimulation and all the chakras receive a burst of energy.
This kriya works to gently stimulate and balance the glandular system, especially the pituitary gland, which is associated with the Sixth Chakra.
This kriya brings deep relaxation and calmness. It causes the tension in all the eye muscles to relax so that abnormal vision can decrease. The eyes are keys to entering the vision of the inner world as well as the outer world.
This is an excellent warm-up exercise before a kriya, and is beneficial as an exercise in its own right. It increases cardiac activity and circulation, stretches and bends the spine, massages the inner organs, aids the digestive system, exercises the lungs, and oxygenates the blood.