Whether you see things more from the evolutionary or creation point of reference, there was always a time that preceded modern medicine. In times of old, healers were considered to be mysterious people, having special abilities or powers that the average person did not. Healers who chose to serve those in need using what they had were the pioneers of mind/body/spirit medicine.
Life style is related to health and wellness, and learning to observe one's habits, tendencies and intentions can be a place to begin a deeper form of self care. The external body is our personal 3-D material expression, and as such, holds pathways to understanding ourselves, as both a starting point and a way to work inwards.
The internal body is also in a material form, but is felt rather than visually seen, and so it expresses a different form of self contact, one that is seen and experienced through feeling.
Practicing stillness can be shown through movement. Movement occurs in stillness. The bodily systems are circuits within that connect to circles outside. A practice that involves moving the body in circular ways connects inside and outside circles. When we view ourselves as actually being inside and outside circles, instead of "us" as a static ego-entity, then life is flowing more like water. When life is flowing like water we move from situation to situation without preconceived notions. Does water think about where its going next?