Another breathing technique which cultivates energy is Kapalbhati Pranayama (the skull-shining breath). This Yogic breath is effective in the purification process. The skull-shining breath implies a purification of the energy channels within the head. It helps to expel excess carbon dioxide from the blood. It also helps stir up mucous with forceful exhalations. This breathing technique provides more energy and can be useful if you are feeling tired and must stay awake as it can refresh you.