In Star Wars movies we often see poi-style lightsaber movements:
Poi performers (e.g. fire performers) use the weight of a prop to make it go round. To my understanding, to do this with a physical sword you need the center of mass (a.k.a. point of balance) to be out of the handle, which is typical for swords:
However, since lightsaber blade has near-zero mass, its POB must be inside of the handle. Moreover, the Wookieepedia article claims that the blade actually has a gyroscopic effect (which makes swinging almost impossible):
Due to the weightlessness of plasma and the strong gyroscopic effect generated by it, lightsabers required a great deal of strength and dexterity to wield, and it was extremely difficult—and dangerous—for the untrained to attempt using.
How the possibility of round movements with a lightsaber can be explained?
I've checked several questions about lightsabers and the Force:
- What good is the force in a lightsaber duel?
- Is the use of a lightsaber possible without a connection to the Force?
- Do Non-Jedi (and Non-Sith) Use Lightsabers?
There were no answers, claiming that the Force changes lightsaber's physical properties somehow (i.e. adds weight to the blade). They say Force affects practitioner's body, mind (perception), all the surroundings, but the lightsaber remains the same.
The only exception could be channeling a lighting through the lightsaber blade, but I doubt that adds its weight somehow.
In this video Lucas says that fight choreographic was inspired by kendo in the first three movies. Which is perfectly fine, since you actually can strike a weightless blade in kendo style. So the question is primarily about the later films (e.g. Count Dooku style).