That space where the pondering takes place is not an organ or of physical mass that science has figured out how to measure or even what it is. (religion.blogs.cnn.com)
Developing physical mass is a gradual development where persistence pays off with a good outcome. (muscleandfitnesstips.org)
When you exhale, the lungs empty, making the torso more compact, so there is less physical mass between your upper and lower body as they move toward each other. (yogajournal.com)