Generating power - a boxing perspective

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Asteer
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Generating power - a boxing perspective

Post by Asteer »

Hello All,

In past threads there has been much discussion on how power is generated in a strike. I thought you all might be intested in the following assessment from a boxing point of view. It is kind of neat because it actually applies some percentages of the sources of power generation.
Many coaches mistakenly believe that most of the power generated by the punch comes from the muscles of the arm. However, biomechanical analysis has demonstrated that the straight punch is delivered by a movement that is a combination of ankle plantar flexion, knee and hip extension, trunk rotation, and arm extension (the kinetic link system). The relative contribution of the arm muscles was found to be only 24%, as compared with 37 and 39% for the trunk and legs, respectively (13). As with most sports, it is the coordinated, sequential summation of forces that ultimately dictates the impact of the force delivered and therefore the potential for injury.
13. Koryak, Y.A. Assessing neuromuscular speed and speed-strength in boxers. Soviet Sport Rev. 26:(4) 195–198. 1995
The quotation is from the following article:
M. Brian Wallace PhD and Sean Flanagan MS, ATC, CSCSN. 1999: Boxing: Resistance Training Considerations for Modifying Injury Risk. Strength and Conditioning Journal: Vol. 21, No. 3, pp. 31–39.

I don't claim any expertise in the area, but thought the reference was interesting.
Guest

Post by Guest »

wow! are you sure? Because that sounds like an aweful lot of body movement...
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Asteer
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Post by Asteer »

I don't have access to the original study which is referenced, but my reading of it is not that the big joints are not necessarily moving a lot, but that they are generating a large portion of the eventual power being delivered. Obviously, the shoulder and arm joints will show the most movement, but they supposedly deliver a smaller proportion of the power.

That is just my reading...
Guest

Post by Guest »

Sorry, I was being sarcastic, and not at you. I have detractors who claim I moved my body too much in karate. I got fed up with it and simply walked away. Took up fishing and kayaking. much more enjoyable (and cheaper).

I've actually been taking boxing lessons for a couple months now and what you posted sounds pretty good to me, although i'm still learning.
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Bill Glasheen
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Post by Bill Glasheen »

Asteer

Thanks so very much for this reference. I'll have to give it a look.

What incredibly precise language! This is extremely important to understand, and emphasizes some of the same mechanics I was discussing in the Great Body Mechanics thread.

Just the other day, I had some quiet e-mails from Van who wanted to clue a chi-believing friend of his on some of the discussions we were having on the subject. Sadly I had to respond with "Which one?"

I love taking language used by the chi-sters, and then juxtapose it to carefully-done studies such as these. Indeed where is the "source" of chi? And how does it "flow through the body?" When you squint with your metaphorical eyes, you can see that they just about have it right. They just don't understand where that energy comes from.

Yes, it's more complicated than most people understand. But you can get the idea with a few basic studies such as these that discuss the general subject of power generation.

It's a lot easier just to throw your hands up and talk of chi flow, no? :wink:

I listen to such people, and find it easier and easier to translate what experienced "chi-sters" say into good evidence-based, scientific language.

Whatever helps the karateka punch hard is good by me. 8)

- Bill
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Chi-sters

Post by Ruiner »

From a guy who's forum picture has 5 guys linking minds with their third eyes, you seem to disregard the mystical aspect of martial arts.

The chi (energy) is drawn from the earth and through the feet, legs, hips, arms and finally hands, just like the boxer mentioned.

Let the Chi flow (or travel up the body) :wink:
The Dragon likes to twist, wind, and coil. No rules apply; an attack will occur when you least expect it.
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Re: Chi-sters

Post by Guest »

Ruiner wrote:From a guy who's forum picture has 5 guys linking minds with their third eyes, you seem to disregard the mystical aspect of martial arts.
hah! Actually, thats my fault, I designed that logo many moons ago. When I designed it, it wasn't phsycic phenomenoa I had in mind but I do see your point. I still think it's an appropriate logo for Bill and his forum.
Stryke

Post by Stryke »

From a guy who's forum picture has 5 guys linking minds with their third eyes, you seem to disregard the mystical aspect of martial arts.
Hey youve got to get these entrenched scientific minds a chance to catch up to the intuitive and elightened ones 8) :lol: :lol:





I listen to such people, and find it easier and easier to translate what experienced "chi-sters" say into good evidence-based, scientific language.
It`s good to see science catching up .... Chisters get written of because theres as much bad Chi talk in martial arts , as there is terrible science analogys and shabby physics .

the tricks to distinguish the good from the bad .

I love taking language used by the chi-sters, and then juxtapose it to carefully-done studies such as these. Indeed where is the "source" of chi? And how does it "flow through the body?" When you squint with your metaphorical eyes, you can see that they just about have it right. They just don't understand where that energy comes from.
Call it summation of joint forces , or jusr realise you can feel the result physically , either way same result , personally I beleive both are needed to get to a level beyond mere imitation .

But I havent got there yet ;)
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The Mind

Post by Ruiner »

The mind is a powerful and mystical organ in itself that science doesn't fully understand.

If you only look at the scientific then you limit your self and maybe miss out on the other possibilities science hasn't discovered.

Bill seems to be a science governs all guy.. our science is primitive.

Sorry side rant heh
The Dragon likes to twist, wind, and coil. No rules apply; an attack will occur when you least expect it.
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Great post Marcus.

Post by Ruiner »

I agree with your post Marcus, I'm sure many others are on the same page with us.

Cheers mate
The Dragon likes to twist, wind, and coil. No rules apply; an attack will occur when you least expect it.
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Post by Guest »

Bill is suprisingly down to earth and open minded with respect to other PhD's.
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Phds

Post by Ruiner »

I know allot of PHD's from uni and your right they are pretty high and mighty.. those english accents sounded soooo snooty. And they would put down students who had questions.

Just because you are a PHD doesn't mean your right.. or smart.. just a good student (regurgitator)

Wow I sound bitter heh, after four years of uni that was enough math for me. So no PHD behind my name.

Ah well at least frosh week was fun :lol:
The Dragon likes to twist, wind, and coil. No rules apply; an attack will occur when you least expect it.
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Bill Glasheen
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Post by Bill Glasheen »

Ruiner wrote: The mind is a powerful and mystical organ in itself that science doesn't fully understand.

Who is science? Could you possibly introduce him to me? And of course you are going to introduce me to someone who does fully understand the mind, right?

Physical phenomena always have and always will exist independent of the constructs humans use to describe them. Calling something "chi" is no more helpful than calling it "Fred" or "Fuzzy Rabbit." What's even more remarkable is conversing with some folks (such as Tim Cartmell) who are students of internal Chinese arts and can speak the language. Those folks like Tim who know both Mandarin and English and are broadly-trained students of the arts will tell you several things:

1) The way the "chi" word is tossed around in the English language by most bears no resemblance to what the original Chinese language and concepts are about, and

2) There's no need to invoke the mystical in teaching internal arts such as taijiquan and xing yi.

Tim, by the way, was kind enough to drop by this forum some time back, and he sent me a freebie copy of his book Xing Yi Health Maintenance and Internal Strength Development. Why? Because he appreciated the group's general attempt to apply reason and logic to physical phenomena rather than resorting to invoking the mystical. And the book? It is not a treatise on chi. Quite the contrary...
Ruiner wrote: Bill seems to be a science governs all guy.. our science is primitive.
Sorry to hear about your science, mate! Perhaps you learned something more useful during frosh week, eh? :wink:
The chi (energy) is drawn from the earth and through the feet, legs, hips, arms and finally hands, just like the boxer mentioned.
It wasn't a boxer, and that wasn't what he said.

If you're drawing energy from the earth, then you're sitting on an oil well in Saudi Arabia, you've found yourself a source of yellowcake, or you've got yourself a nice geothermal heating unit. Otherwise, I suggest you check back with Sir Isaac Newton here.

It's precisely this kind of language that does nobody any good. And it's all the more reason to go back and read the original passage more carefully.
Marcus wrote: Call it summation of joint forces , or jusr realise you can feel the result physically , either way same result , personally I beleive both are needed to get to a level beyond mere imitation .
Indeed. When you master both, then you've got the principles down and can run with them to wherever your heart desires.

I just got through a weekend working and talking with Patrick McCarthy. Now there's a fellow who can see the physical patterns in the choreography. And because he can, he can run with it all. No, his goal isn't to dis the traditional. Quite the contrary, it's to help us walk the paths that the original choreographers walked, and then send us on to our own journeys.

- Bill
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Bill Glasheen
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Post by Bill Glasheen »

Ruiner wrote: Just because you are a PHD doesn't mean your right.. or smart.. just a good student (regurgitator)

Wow I sound bitter heh, after four years of uni that was enough math for me.
You obviously are confused. Perhaps I can help.

BS = BullSchit

MS = More Schit

PhD = Piled higher & Deeper


Now that we've covered that...

Perhaps what you didn't learn at the uni is something most people eventually find out the hard way when entering a doctoral program. A great number of people manage to make the "ABD" degree (all but dissertation :wink: ). But getting those final three letters has little to do with what you can "regurgitate." If it did, then I never would have made it. I sucked at subjects like biochemistry that required little more than rote memorization. I have the memory of a seive. My personal talent is in analytic reasoning. I surround myself with books and recording devices to help me with my deficiencies.

Quite the contrary, the dissertation is a researcher's first peer-reviewed piece of original work/research.

Most people find a talent somewhere, and everyone is ignorant in something. Not everyone can do original work. That in itself means nothing on a value scale. It is what it is.

- Bill
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Post by Guest »

But what does it have to do with Chi? :multi: :multi: :multi:
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