I have had the very humbling privilege of training with some extremely high ranking Hapkido Grandmasters including the honorable Grandmaster Ji Han Jae, Grandmaster In Sun Seo, who both demonstrate "Ki energy regularly". All Masters and Grandmaster have a somewhat different idea of "Ki". Each has given me an entirely different description of what "Ki" energy is. Grandmaster Ji Han Jae explained Adrenaline has alot to do with Ki energy, I believe this to be true. From all of my research, here is how I describe "Ki Energy";
is when all energy sources come together. We have physical energy from our body,
mental energy from our mind and spiritual energy. The body can only produce
maximum energy when all of our internal organs are in balance, proper diet,
nutrition, proper hydration. The energy sources which power the nervous and
muscular systems of the body can only flow uninterrupted when we take proper
care of our bodies.
- Master Frank S.