Rather than take another thread off-topic, I'm going to start a new one here, beginning with the questions asked in this post:
No, I don't have any videos I can post... sorry. But I'll try to explain it in writing as best I can.
I should have put different punctuation in; spring style (hips) is what I was referring to in boxing, and I'll get back to that in a minute.
Sine wave is a natural up and down motion; watch yourself walking in a mirror and you'll see it, as your eyes go up and down fractionally as you walk. At one point, it was being exaggerated beyond the point of being useful in the ITF because of a seminar taught by Gen. Choi. He was trying to get people to bend their knees and allow their bodies to move up and down fractionally in that natural motion I was referring to, and kept repeating "down-up-down" over and over. The seniors in the front, in response to his repetition, began to exaggerate the motion more and more, dipping farther down and rising farther up; the juniors, to whom he was really talking, nodded their heads and continued to keep their legs locked, as they didn't have any idea what he was really talking about.
This morphed, over time, into the exaggerated motion most people refer to as sine wave, and which most people, reasonably enough, think is ineffective - because the exaggeration is ineffective. I do teach the exaggerated motion to my students when they're just learning, so they understand what is happening with their bodies - but once they gain some understanding, the motion is damped down from the exaggerated rise and fall most people think of. Being a natural motion, there should be no starting and stopping - it's part of the way your body moves, and should be used as such.
Once you understand how your body works, and understand the natural up and down motion, you can start incorporating it into your movements, and modify it - for example, I generally keep my head height level, and instead the down and up motions are in my thighs; that allows me to add a little more control and power, especially when I use my hips.
This brings us to spring style, or hip motion. Hips can move in lots of ways, and, being so close to the body's center of gravity, have a great deal to do with power. Hips can move in the direction of the technique, or opposite the technique; the movement can be a turning/torquing motion, a back to front motion, or an up and down motion (tied into the sine wave, but not the same), depending on the technique and the desired outcome. To turn the hips, you have to pick your heels up off the ground (or your feet will stick to the floor), which means you have to either raise your entire body off the floor, or bend your knees and take the weight change in your thighs - this is where sine wave comes into spring style, and why the two are related.
Does this make sense? It's much easier to demonstrate than it is to put into writing, but I don't have any videos I can share that show the proper technique - and anyway, it would have to be a specially created video that shows slow and then fast motion; if done properly, the motions (spring and sine wave - but especially sine wave) are not easily seen.
Kacey, I'm open-minded. If the technique works, it works. From the various clips I've seen on the net, I concluded sine wave doesn't work. How can it? The people I've seen lose much of their kinetic energy by starting and stopping their movement as they raise and lower themselves through their forms. I've dabbled in Chinese martial arts (chaquan and changquan) and no "spring leg" movement I've been exposed to has such noticeable pausing and broken chaining.
If your version of the sinewave is different, I'd love to see a clip. Do you have one? The type of sinewave I am referring to was on Master Mac's site at one point. I stand by my statement, but I'd be happy to learn something new if it's out there to be explored.
No, I don't have any videos I can post... sorry. But I'll try to explain it in writing as best I can.
I should have put different punctuation in; spring style (hips) is what I was referring to in boxing, and I'll get back to that in a minute.
Sine wave is a natural up and down motion; watch yourself walking in a mirror and you'll see it, as your eyes go up and down fractionally as you walk. At one point, it was being exaggerated beyond the point of being useful in the ITF because of a seminar taught by Gen. Choi. He was trying to get people to bend their knees and allow their bodies to move up and down fractionally in that natural motion I was referring to, and kept repeating "down-up-down" over and over. The seniors in the front, in response to his repetition, began to exaggerate the motion more and more, dipping farther down and rising farther up; the juniors, to whom he was really talking, nodded their heads and continued to keep their legs locked, as they didn't have any idea what he was really talking about.
This morphed, over time, into the exaggerated motion most people refer to as sine wave, and which most people, reasonably enough, think is ineffective - because the exaggeration is ineffective. I do teach the exaggerated motion to my students when they're just learning, so they understand what is happening with their bodies - but once they gain some understanding, the motion is damped down from the exaggerated rise and fall most people think of. Being a natural motion, there should be no starting and stopping - it's part of the way your body moves, and should be used as such.
Once you understand how your body works, and understand the natural up and down motion, you can start incorporating it into your movements, and modify it - for example, I generally keep my head height level, and instead the down and up motions are in my thighs; that allows me to add a little more control and power, especially when I use my hips.
This brings us to spring style, or hip motion. Hips can move in lots of ways, and, being so close to the body's center of gravity, have a great deal to do with power. Hips can move in the direction of the technique, or opposite the technique; the movement can be a turning/torquing motion, a back to front motion, or an up and down motion (tied into the sine wave, but not the same), depending on the technique and the desired outcome. To turn the hips, you have to pick your heels up off the ground (or your feet will stick to the floor), which means you have to either raise your entire body off the floor, or bend your knees and take the weight change in your thighs - this is where sine wave comes into spring style, and why the two are related.
Does this make sense? It's much easier to demonstrate than it is to put into writing, but I don't have any videos I can share that show the proper technique - and anyway, it would have to be a specially created video that shows slow and then fast motion; if done properly, the motions (spring and sine wave - but especially sine wave) are not easily seen.