IMO, I call this a relaxed outward stretch with no muscle tension in any direction, and in order to maintain the in/yo concept..
is it important that there is 'no' muscle tension, or rather that it is perfectly balanced and (mutually) supported? And..moreover...that there is 'no local' firing...but rather an 'open' 'distributed' strength?
how does power build/accrue if there is no tension? What happens when you need strength now