To answer your question Kriya Yoga works with the energy. You will find that all of our internal energy is connected with the breath. We control the energy in our spine with our breath. The goal is to practice Kriya so deeply that breath becomes mind and our breath is dropped and we merge into superconsciousness bliss. The energy we move in our spine enliven and awaken our dormant chakras in our spine. When our chakras become more awakened by the spinal spiritual energy the more our consciousness will emanate and feel God's beautiful qualites. So the breath, energy, and chakras are all connected.