Here's a short answer: Core Energetics is a body-centered, evolutionary process that seeks to restore all dimensions of personal reality to a unified state. These dimensions; mind, body, emotions, spirit and the will, are addressed individually or perhaps in pairs in other modalities and in religions. Core Energetics addresses the whole of you and brings these dimensions into unity. In so doing, it accelerates the evolution of you, as a spiritual/human being.

Here's how it sometimes goes: With guidance, you talk about your life as you see it, you move energy in your body through movement, breath, etc., you release pent up feelings, you gain a clearer lens through which to see your life, you talk about how you see things now, you open yourself to broader possibilities in your life!
Click here for a slightly longer answer: www.kateholt.info/core.html