Hi Mike,
I don't see qi gong as just a healing system either. I also mentioned transformation and regeneration in my other post. In concept, qigong can be difficult to define, in terms of how much it can be.
I had a very traditional and accomplished Shaolin teacher once that always said, work out when you feel like it. Your statement, " When I want to do something,I have the full force of my energy available to me to do it.", reminds me of this. I have found this to be true. I was blessed with will power and self discipline, so I am able to practice at other times too. I know this is not the case for everyone.