Filling/peng

I have started to experience something interesting. When I Stand and relax my soft tissues they seem to "empty out". This void between the skin surfaces is filled with an empty support that pushes out in all directions and the muscles soften even more. I'm neither light nor heavy. The support in the tissues does not produce a feeling of high pressure. It feels simply full and soft yet there is some power when I move. It's very interesting. I can tell that it's a weak version of something that will continue to increase as I train. I've never felt this before. It's really exciting! Another interesting thing about this is that I can't "make" it happen. It's a consequence of the training. I use the Standing mental model and when I relax and soften it just happens.