This is interesting. In our never-ending 24 hour news cycle, our central nervous systems are hijacked by adrenaline, glucose, nicotine & caffeine.
It is a never ending struggle for our bodies to feel relaxed. I fully believe this is a major hindrance to creativity as the logical, ordered side takes over and rules the roost like a dictator.
Although I haven't used this specific technique, I have however done Alexander Technique in my theatre training. It's incredible how much tension our bodies can hold without our minds being aware or conscious of it.