Front side resistance question

[jryan15]

Here is an experiment for a Right hander:

1. Stand on your right leg with arms out to side (palms down)
2. Do a good hard scap pull back*
3. Observe how your right hip reacts to the movement (it should punch forward)
*Make sure you're not just moving your arm back, be sure to use your scap correctly!

They interconnected. When you over hand throw, do you rotate your hips, or do they just move in reaction to an arm pullback (this assumes the thrower, throws at a high level)?

If yes, why should we expect pitching to be different?

For those who don't have time to experiment here it is.

scap pullback.........arm pullback

Watch my left knee to see just how much more hip turn the scap move generated. If you are only looking at the arms, the move doesn't look much different at all... Two similar movements on the surface lead to vastly different results.