Knots of Energy

Today I was reading my book about Buddhist meditation, and it mentioned that as your practice begins to deepen you may encounter "knots" of energy as feelings of pain in your body. According to the book, these knots are created by suppressing emotions, and generally living your life in an unaware way.  As you become more aware of the energy knots, they tend to untie and relax.  At that point the book says that your energy will flow more easily.  I became interested in this because it presumed that as you were meditating that you were aware of energy flowing through you.  I wrote a post here about how the universe is essentially a big ocean of energy. I also have an interest in practices like Qi Gong and Tai Chi Chuan. Although it has been quite a while since I have practiced either of these, I am familiar with the movements and the feelings of the energy flowing.  It never occurred to me to pay attention to this while meditating, so now I feel excited about the new possibilities.