The foundation of all life, of the whole universe, is the subtle life force energy the yogis call ‘prana.’ This mystical energy flows through our bodies and generates our every action – from gross physical movements to minute biochemical processes.Hatha and Tantra yogas have developed a rich description of the anatomy of the subtle or energy body, including the different types of energies, the nadi energy channels and chakra energy centers. These yogas have also developed various methods to increase, cultivate and direct this spiritual energy.