Pranayam is a breathing technique that expands pranic energy in the body. It involves more than just inhaling and exhaling oxygen, as it encourages vital life force energy called prana. Our lifestyle, actions, diet, thoughts, and senses can deplete our pranic energy levels and cause energy loss or blockages if irregular. Practicing pranayam after yoga poses helps expand and balance the five types of prana in the body. When doing pranayam, it is important to follow rules like practicing on an empty stomach, in a well-ventilated area, remembering a mantra during breaths, keeping the eyes closed, and not overexerting.