There are no discernible remnants of anything unrelated to the weapons in YMVT.
Nothing to point to and suggest "could have" come from another source than the weapons, and no alternative source to point to as the "could have been" that we can investigate.
---Well, there is this very basic matter of body mechanics differing quite considerably between pole and empty hands. How many times has that little fact been pointed out now???
The important part of the body mechanic is exactly the same in pole and empty hands.