
Originally Posted by
kenkrause
From what I have seen (and taught), it isn't the aggressive forward movement alone that generates the speed. It's also the blocking of the front side that stops the body but allows the arm to swing freely (whip).
Think of what happens when you're driving along a little too quickly down the road, then suddenly have to slam on the brakes. What happens to your body? It lurches forward, accelerated by the sudden stop. If you hit the car in front of you, which creates a more sudden stop, your body lurches forward faster and more violently. The faster you were going before you slammed on the brakes, the faster you will move forward.
It's the same with pitching. Your body is the car. The more quickly and powerfully it moves forward, the more momentum it generates. When the stride foot lands it's like slamming on the brakes. The arm is the "passenger" lurching forward after the sudden stop (as long as it remains loose).