Sirsasana
Considered from the Yogi the "King of Asana" because of its prodigious benefits, the Headstand is the first of the 12 asana and is considered by many to be a panacea for countless human ills. It regenerates the body and the mind. Re-establish a perfect equilibrium between negative and positive energy.

Sitting and standing for most of the day causes your circulation to become sluggish, so your heart has to work harder to pump sufficient blood to the upper parts of your body.
Normally, your heart works against gravity; inverting your entire body lessens the strain on your heart, and allows a plentiful supply of oxygen-rich blood to reach your head and brain.

Headstand, and other inverted poses, increase circulation, stimulate the brain, enhance glandular system functioning, and relieve pressure on the abdominal organs.

Benefits:

Stimulates hypophysis, stops and prevent the decline of the organs, is very useful for prolapsed uterus, the prostate and loins, prevents and cures the formation of varicose veins and hemorrhoids, reinforces the memory and ability of concentration, improves digestion and expulsion, cures every weakness of the abdominal organs, headaches and flu, prevents and cures hair loss.

Contraindication: To avoid absolutely in the menstrual period, with inflammation on the eyes, ears, nose, and mouth, and with low or high arteriose blood pressure, in case of lesion on the spinal column, take off any Lents and glasses.