Prana is the universal principle of energy or life force. It is the sum total of all energy that is manifest in the universe, in nature and humans.
Whatever moves or has life is a manifestation of prana.
When we nourish our bodies, we are fueling this energy. By choosing foods made by hand, with love, you increases the strength of prana.
When you think positive and caring thoughts about yourself or others you are strengthening prana.
Prana is expended by thinking, willing, acting, moving, talking and writing. A healthy strong person has an abundance of prana.
Prana is supplied by food, water, air, and solar energy. Proper breath techniques allow the body to store prana and to revitalize.