No. That would not be intelligent. I think we all agree hands should be learned first.
Take Esperanto for example, a constructed language based on several existing languages.
If you were to teach or learn Esperanto, you would not just jump straight into dialogue, or spend years learning all the languages it was based on, but would also learn the alphabet, phonetics, and such first.
Doesn't matter that it was constructed from something else. You need not learn that first.
Same with a newly constructed empty hand fighting method. You don't have to learn what it was based on first before starting, especially if it was weapons! A beginner can be shown the knife and pole ideas to get a view of the big picture from the start, but they shouldn't start with training the knives.
While the tactical guidelines are shared, the overall strategy between knives and empty hand is still quite opposite. Best not to confuse the student with contradictory training from the start. It will do more harm than good.
But worse, if you transfer hand ideas straight to knives you will get dead real quick. So, it's important to know clearly what you're working with.
Have you learned VT knives or any other similar TCMA knives? From a post you made a while back, it seems that you haven't. So, I don't know how you can compare.
First I totally agree that you do not HAVE to start with empty hands, I don't think anyone is saying that. However if you have weapons in your system, while not via an exact 1-1 transfer, if you have both empty hand striking and shorter single handed weapons, there are times where you can see, if you know what you are looking for, connections and if a practitioner feel, even if it is not obvious.
As for the Baat Jaam Do, no I have yet to progress that far, however I have a lot of experience with weapons usage in terms of functional (read non-sport) martial arts, specifically Kali which does extensive double sword work. Due to this, since I mentioned it first, I have made a study of the construction of swords and knives, not just materials but blade shape and edge geometry. So when I look at the knives often used in Hung Ga I can see the differences that also often exist from those used in WC.
Next the techniques. Here is a very short list of the many differences I see.
When I look at WC:
1. I see a lot more of what are commonly called "wrist cuts". Quick and dirty description? You essentially drive the arm forward almost like a punch and then as it gets close to the target "snap" (for lack of a better) the wrist so the blade cuts the target.
2. while there is actual "slashing" from angles, say 2 o'clock and 10 o'clock (for me these are angles 1 and 2), your are performing the slashing with a not unfamiliar upright body structure and with (compared to other arts) excessive upper body rotation, in this way both blades are always in a position to attack and defend. There is also not a lot of what (again WC compared to other arts) one would call "excessive" preloading. So when you work the angles you don't start with you blade to far off, nor do you end to far off of the centerline. When your slashing blade does go off, to the extent it does, you other blade is on the centerline to defend.
3. The primary thrusts are very much like the punch in terms of overall body mechanics. They go along the centerline plane and you do not push off with your trailing leg to add power, leaning into the target, you maintain consistent structure.
4. As you move the blades you still adhere to centerline theory, even if you do not always stand square on to your opponent with the knives.
When I look at Hung Ga:
1. Not as much in the way of "wrist cuts"
2. Overall deeper stances, some MUCH deeper.
3. When you "work the angles" there will be more rotation of the body to power the slash, also sometimes you will rotate in such a way that your other blade can not be said to effectively defending the centerline. Additionally when you start and stop the blade itself, not accounting for body rotation, they will start and end further off the centerline, very reminiscent of some of the 5 animals elements of the empty hand portion of the art.
You may even power a slash with a "thrust like" propulsion using the trailing leg, almost leaning into the target.
4. Actual thrusting can definitely involve a stereotypical sword thrust propulsion from the trailing leg, sometimes as deep as an Olympic fencer. Sometimes they will be so "deep" into the thrust that their other blade will be behind them.
5. In short centerline theory, as we know it, is almost non existent.
This is but a short list of the differences between the two methods of knife/sword fighting BUT if you understand large knife and/or sword combat, you can easily see the numerous differences in technique and principles. My friend who only studies HEMA sees them and he knows nothing about CMA. Why? Because even if he doesn't know the names of the forms, couldn't even name the MAs just by looking at them, he knows how to fight with swords and long knives.
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