Usage of hips and how you hold your hand

[pers]

It's not controversy, it's physics.

 

Put up a piece of 4 foot high plywood with a 2 foot supporting stand at the base.

 

Scenario 1:

 

You take a tennis ball and throw it at the board as hard as you can. You probably will not knock the plywood over and the ball will bounce back - or at least it would take a lot of effort to do so.

 

Scenario 2:

 

You take the same tennis ball and affix it to the end of a broom stick. Now apply the same speed and force you applied it scenario 1 and keep your feet firmly planted. You also stop the ball at 2 inches past contact. The board goes flying with no problem and the tennis ball stays where it is.

 

What's the difference of the above two scenarios? Both Scenarios have the "same" equal and oposite reaction from impact. The oposite reaction force of scenario 1 is transmitted back through the ball and with no resistance the ball goes bouncing backwards until all of the reaction force is expended. The oposite reaction force of scenario 2 is also transmitted back to the ball. However, it is also absorbed throught the broom stick, through your body to the ground, back through your body, broom stick and ball, and the initial reaction force is returned to the plywood. Result is that the initial force, or a very high percentage of it (some if lost through muscles and joints - especially weak joints of poor technique), is redirected back to your target.

 

Now based on your understanding of the need to "not" contract or pause (as you state), the result would be the same as scenario 1. However, with even a nano-second of kime, your result will be some level or variation of scenario two. To pause is to apply kime is to apply the reaction force generated to your oponent.

 

After kime, a nano or split-second, then continue moving on you way with whatever you were going to do - it's almost seamless with practise...

 

- Killer -

 

 

 

Excellent post ! well said .

 

The next best thing to actually see kime performed by a competent karateka .

[Killer Miller]

Thanks pers. I take it as a compliment coming from a Nidan.

 

- Killer -

[brickman]

some good posts so far....didnt expect so many replies.

 

Now...how about that tension??? Are you really really tense when you hit? Give me a number like 1-100....100 being as tense as you can possibly make your body.

 

Also, with one exception....does your hip make an arc? like the Karate Kid II thing?

[yamesu]

What's the difference of the above two scenarios? Both Scenarios have the "same" equal and oposite reaction from impact. The oposite reaction force of scenario 1 is transmitted back through the ball and with no resistance the ball goes bouncing backwards until all of the reaction force is expended. The oposite reaction force of scenario 2 is also transmitted back to the ball. However, it is also absorbed throught the broom stick, through your body to the ground, back through your body, broom stick and ball, and the initial reaction force is returned to the plywood. Result is that the initial force, or a very high percentage of it (some if lost through muscles and joints - especially weak joints of poor technique), is redirected back to your target.

Technically, the ball that bounces off the wood carries more initial force. (Laws of Inertia.)

 

It requites more force for an object to bounce off another after impact, than it does for that same object to completely stop.

 

If we were to take the broomstick-tennisball, and thrust at the plywood with only half as much power as we threw the ball, the board still falls.

 

Why?

 

Because we are completing the action of Pushing, rather than Striking.

 

Hence, distributing the force throughout the object differently.

 

The useage of hips in striking is to get this Inertia into the impact. (Unless of course the intent is to push.)

 

OSU.

[Killer Miller]

Well, that would be the factor of acceleration - which I don't think anyone would disagree with. But from a practical perspective doesn't really apply to the point here. In the general sense it's an equal and oposite reaction assuming that acceleration is a constant factor.

 

As far as pushing, a firm plant to the ground is still required just as a quick impact of an object. They are both the same, just the speed and acceleration factor changes at time of impact and your focal point changes from pushing until the plywood is knocked over to 2 inches past contact. The result is the same for the purpose of knocking over the plywood, it's just that recover time is quicker to move on and do something else... Hence, the reason and purpose of Kime.

 

- Killer -

What's the difference of the above two scenarios? Both Scenarios have the "same" equal and oposite reaction from impact. The oposite reaction force of scenario 1 is transmitted back through the ball and with no resistance the ball goes bouncing backwards until all of the reaction force is expended. The oposite reaction force of scenario 2 is also transmitted back to the ball. However, it is also absorbed throught the broom stick, through your body to the ground, back through your body, broom stick and ball, and the initial reaction force is returned to the plywood. Result is that the initial force, or a very high percentage of it (some if lost through muscles and joints - especially weak joints of poor technique), is redirected back to your target.

Technically, the ball that bounces off the wood carries more initial force. (Laws of Inertia.)

 

It requites more force for an object to bounce off another after impact, than it does for that same object to completely stop.

 

If we were to take the broomstick-tennisball, and thrust at the plywood with only half as much power as we threw the ball, the board still falls.

 

Why?

 

Because we are completing the action of Pushing, rather than Striking.

 

Hence, distributing the force throughout the object differently.

 

The useage of hips in striking is to get this Inertia into the impact. (Unless of course the intent is to push.)

 

OSU.

[Killer Miller]

Tense = 100 for 1 nano-second... The back close to 0 right after kime. For that nano-second, your entire body should be like a tank or brick wall. However, this is for destructive types of impact or techniques. Although we are not referring to more fluid types of techniques and moves. For example, sweeps, blocks, etc.

 

The question about the hip arcing, I'm not sure I understand the question. Please elaborate.

 

- Killer -

some good posts so far....didnt expect so many replies.

 

Now...how about that tension??? Are you really really tense when you hit? Give me a number like 1-100....100 being as tense as you can possibly make your body.

 

Also, with one exception....does your hip make an arc? like the Karate Kid II thing?

[brickman]

ok...if you were to put a laserlight on the knot of your belt when you punch would it make an arc across the room when you punched? Have you seen karate kid II?? When they are fighting at the end? Something like that.....I realize it is Holywood...but maybe that helps explain my meaning.

[pers]

some good posts so far....didnt expect so many replies.

 

Now...how about that tension??? Are you really really tense when you hit? Give me a number like 1-100....100 being as tense as you can possibly make your body.

 

Also, with one exception....does your hip make an arc? like the Karate Kid II thing?

 

How tense ? that depends on person's ability and time of training ,my sensie's kime is much more advanced than mine ,do you see what I mean ? as killer mentioned it is only for a split second ,the shorter the kime and faster it is performed ,providing all other factors involved are performed as good ,the more destructive is the technique!