[quote=Beorn;1972124]I am so sick and tired of pseudo scientific crap being spewed on these forums.
what this means, in terms of striking, is that the most efficient strike is the one that can deliver the most power the most amount of times given the system it is based on (the anatomy of the human body)
now lets look at the efficiency of your jkd style punch vs a standard boxing jab. First and foremost, if you are using anything even remotely resembling a “shoulder whirl” you lose. the shoulders are some of the least efficient muscles in the body, as it has a relatively short force arm compared to a long resistance arm (the deltoid versus the entire length of the rest of the arm. that means that if you are “shoulder whirling”, or arm punching to the rest of the world, you are requiring a high amount of force out of fairly small muscles, and as a result will tire quickly, not to mention not generate a great deal of force, as the deltiods are not as capable as other muscles (more on that in a second).
compare that to a boxing jab, which is what the standard mma practitioner uses. it starts with a small step, which allows for the rotation of the hips. the rotated hips and as of yet unrotated shoulders creates torque on the spine. the affect of this torquing motion is to cause the spine to turn to align itself in a neutral position. as the muscles of your hips and the strength of a boxers stance prevent their base from moving, this force travels up the spine to the shoulders, causing them to turn the direction of the step (i.e. towards your opponent) and generates that much more force when the punch is then thrown. this all happens in a fraction of a second. Now I hope I dont have to explain in kinesiological detail the advantages using your hip and leg muscles over your deltiods for endurance and power, or the mechanical advantage gained by the turning of the hips, but I will in a later post if you still dont get it.
now your in college, claiming to have studied physics. physics is the one science I haven’t studied in college and yet even though i haven’t studied it in four years, my basic understanding is better than yours? You should probably go to your universities financial office and demand a refund, but thats just me.
EDIT: what i just described was a power jab. there are ways to throw a jab without rotating your hips as I described, but even then the rotation of the punch (which i didnt even feel like getting into in my diatribe above) causes the the shoulder to play an ancilliary role to the chest and lats. ill explain that too if you really need it.[/quote]
I’m pretty sure you don’t really know what you are arguing about… you must have missed the part where the JKD straight lead was posted. The whole concept behind the JKD straight lead is to put your whole body into it.
- Arm starts moving
- Raised rear heel pushes off explosively launching person in a forward lunge.
- Arm continues shooting out, shoulder rotate.
- Hand contacts target, fist closes, wrist snaps and hips rotate the punch through the target around 4 inches.
- Feet land and hand comes back to guard position.
That is how it is done as closely as I remember. Why are you acting like the punch is based on shoulders only? In fact, the argument was the other way around. In reality a lot of people just throw weak (feeler) jabs with no weight behind it, this is not what the JKD straigh lead is supposed to be…