Breath
Breathing moves fascia from the inside. Every full nasal breath drops the diaphragm and gently pumps the tissue around it, which is why people who breathe well tend to move well and hold themselves well without thinking about it.
Nasal breathing also keeps the lips closed and the tongue resting against the roof of the mouth, day and night, which is the single most consistent upward force acting on the face. And it settles the nervous system, which matters more than it sounds. A body that feels safe releases tension. A body braced against the world holds onto it.
