Hip Rotation by Kagawa sensei Coach of National team of Japan

[gabehs1]

Thank you for posting this video. It caused an "ah ha!" moment for me and improved my gyaku tsuki after being stuck for about a year in terms of power and snap. Thank you and osu!

[SakuKoivuRocks]

It would be great if we could understand what they are saying. Good nonetheless.

[emulare11]

What's he saying around :27 ?

[macrobioticman]

zenkutsi dachi yoi! Yame!

[Yamtendo]

Can anyone tell me what he's saying from 0:22 to 0:36?

[supertotoro]

wow!! tsuyoi koshi dayone!

[TheMatha0007]

THIS VIDEO IS NOT ENOUGH BUT ITS GOOD

[Lethn]

*step forward with the heel off

[XribbleQuebec]

@rp1322 Many styles and countless people that claim to have the perfect martial art and it all comes down to the fighter himself, this determination, his focus, his control, his speed and his discipline.

Train hard and stay alert!

Feel free to watch my karate competition videos... As you will notice, it is easy for me to talk about theory but applying it in competition is a whole other matter! :)

Oss

[shotojojo1986]

@XribbleQuebec Best comment a Karateka person has ever said. Thank you for that OSU!

[dragonfist84]

@XribbleQuebec Your video was not great sorry. You should practice more....

[XribbleQuebec]

@ttlyADDICTED2BASS When finishing the movement, your hind leg must be straight and your foot firmly planted. The muscles used will be the core (abs and obliques) to keep everything straight to avoid side to side movement and swaying; your buttocks muscle of the hind leg is actually pushing the hips into place and to straight the leg. Please keep in mind that having this amount of flexibility in the hips demands lots of stretching so you don't hurt anything

[rp1322]

you have made some interesting points.

have you ever noticed that if you keep the back foot completely planted, it is harder to accelerate motion forward?

I generate more power (and gain deeper penetration) when I lift the back heal, as I transfer energy forward, without seeking to maintain a rigid connection with the floor.

Then again what I am hitting also matters, whether I am hitting a heavy bag or a bolted down makiwara :)

[XribbleQuebec]

@rp1322 Naturally, if you keep your heel up you will have more spring for forward movement but this video is intended for perfect stance in kata for example.

Oss

[christianbrecht]

@rp1322: if you lift your heel then you are not pushing the floor with your foot. The push on the floor with the heel travels upwards and pushes the hip forward. The point is not to rotate the hip in isolation, the rotation is initiated from the floor. After turning the hips and the punch is executed, the force on the target generates a reactionary force back onto the fist then the armpits then hip and down to the leg and then foot and the floor.

[joetaicoon]

@XribbleQuebec

The thing is that mass is not the same. Though your total mass is the same, the mass which is put to motion is not.

That is part of the hip rotation.. to introduce rotational momentum to the upper body (the extra involved mass) which in turn aditionally moves the shoulder and arm giving more speed.

[XribbleQuebec]

Actually the mass of the person stays constant. We know that. So instead of having just the weight of your arm you're actually getting your body weight in the equation AND by whipping your upper body to increase acceleration.

Momentum is defined as F = m * v

F = force in newtons

m = mass in kg

v = speed in m/s

Hope that helps!

Oss

[joetaicoon]

@XribbleQuebec

Hope that it helps? Whom should it help?

Do we disagree on something ;-)

[FoieGras]

@XribbleQuebec Small correction: Force, F=ma, is the derivative of momentum P=mv. F=dP/dt. In other words, the velocity actually has to change for force.

[candela909]

good for kata

[Jeano777]

is sux

[soujirou86]

O_O! thats kime right there, only with the hips...

[shatterprone]

Interesting: I've been taught to keep shoulders low at all times and I've never consciously observed the shoulder shrugging this man does between hanme and shomen; what's it for?

[Resputin84]

I think he's squeezing his arm pits to connect his punch to his stance

[shatterprone]

Right, that's what one should always do; but I was referring to his actually RAISING the shoulders during the transition (see 0:55 - 1:02).

[Resputin84]

hmm I your right, I dont know why he's doing that

[wetnwild001]

I don't think he does that on purpose... it's just a flaw, and everybody has flaws like that

[86JIINZ]

The shoulder shrug is incorrect, it shouldnt be performed during a punch. however, this demo is displaying how to pivot and lock hips from hami to shomen so he is probably just puttin emphasis in that way. shrugging before twisting his hips gives his abs more of an explosive whip. "tanden" or "abdominal-groin" region should be the only muscles used to aid twisting by the stance, shoulders must be kept low.

OSS.