While at the last seminar Car Dechiara gave a simple demonstration that illustrated why proper rooting is important and also made me realize how internal power can be developed and utilized in wingchun very effectively. The demo was simple, he stood there while you pushed on him and tried to budge him. while doing this I noticed, especially around his joints, knees, elbows, shoulders, etc, small micro adjustments where his body was adjusting to and linking to move the energy down through him to the ground. Later on while discussing where some of our power comes from, it hit me that the same principle for which we were learning to absorb power, was also very similar if not identical to what we do to issue forth internal power.
A good example would be to look at a punch. When you punch, you use your arm, and for most people this is as far as it goes. Now look at the size of the muscle in your arm! Even with large muscle they cannot rival the mass of your leg muscle, which can be used as sort of a building point for internal power, linking your body to draw the energy up and out your fingers. those muscles are much more powerful and add to that the strong structure of the human body, its like a jackhammer! You bones and ligaments provide you with the structure to issue, gather, and send forth all the power you can develop through a strong root and good structure.
This is why your root is so important and why most people dont have the ability to deliver the sort of power they could, if they took the time to be precise. Anyone can get it, absolutely anyone! Its one of the things I think is awesome about wingchun, because this is where the equalizer comes in, If you are a smaller person and you have to fight a bigger opponent, wing chun that has a good root and solid structure can deliver the sort of energy to put those larger opponents down!
You combine these with good sensitivity, the ability to listen to your opponents thoughts and feel him before he feels himself and you have an awesome art!