WholeBodyBreathing is the natural breathing pattern, so it is not a meditation or a breathing exercise. However, we use breath awareness exercises and meditation to release tension and move closer to our natural breathing pattern. Is this clear? If you have any other questions, feel free to ask

@tomtom The theory is very clear and simple, it is the practice that is complicated: at the moment it is very difficult for me to feel the tensions in the scalp, let alone the cranial bones that move with each breath. 

To confirm your theory, it would be useful to look at the skulls of Buddhist monks, who are the leading experts in meditation; if their skulls are well developed then the WBB theory may have a foundation. 

@sceriff You should try to feel the breath deep within your body if you can't feel anything in your skull for now. Focus on where your breath feels blocked at the beginning of each breath. As for monks, yes, some of them have very good development, but it is not automatic. Good development is not just the result of a lack of tension in the body and awareness of it. Karan wrote many detailed posts about it on Discord. you can search for them if you want to learn more about it.