what's a sine wave in martial arts?

[granmasterchen]

am i confusing the sine wave with the typical movements that the body makes when we step forward into an attack or block. Because when we do these motions the body rises and falls in small amounts....or is the sine wave an overdramatized version of this?

[congai]

Sine wave is supposed to work with the natural motions that the body does, but puts a little bit more emphasis into it. It's a little bit confusing for myself, sometimes I get it, sometimes I don't...

If you want to see a picture of a diagram that Master Wheatley drew of the different types of motion, I will post the link, otherwise I won't.

[granmasterchen]

sure why not....it just seems to me that we naturally do the sine wave with out any training.

[marie curie]

I'm still confused- are there any videos out there that demonstrate this?

[TigerDude]

I don't know if this helps, but a sine wave would be the shape traced by a single point on a wheel as the wheel rolls. For example, the valve stem on a tire would make a sine wave as it moves with the tire.

[Dont call me Sir]

When you walk, naturally, the level of your head will rise and fall as you walk. The rise and fall will look like the Sine Wave (shown below).

http://www.math.ucdavis.edu/~angela/sine.jpg

In TKD you will rise as your feet come together (or pass when in Walking Stance) and drop as you execute the technique (feet apart). The downward part, as you execute the technique, is a way of utilising the body's weight. As the body drops the weight is distributed into the technique, say a middle section punch in walking stance. I hope that makes sense?

The problem is; the body mechanics, in terms of weight distribution and force delivered, is floored. The body mechanics just don't work. The maths (science) just don't add up! The Sine Wave is inefficient and ineffective, compared to other ways of delivering power using body weight.

I hope that makes sense.

DCMS.