One of the most common issues among young, developing pitchers (and even a few older ones) is waiting too long to get their momentum moving forward. When they do that, their timing gets all messed up and they are unable to transfer as much energy as they could from their bodies into the ball.
For example, what you will often see in a pitcher with a backswing is that she will stand on her back foot as her arm swings back and wait for it to reach its farthest point. Then she will start her body moving forward as her arm begins to swing forward.
The problem here is that the arm can move forward a lot faster and more easily than the body, so it gets ahead.
A key checkpoint in the pitch is that the drive foot should begin detaching from the pitching rubber when the arms reach the 3 o’clock position, i.e., straight out in front. That’s not going to happen, however, if the arm is racing ahead of the body.
Instead, the arm will either have to slow down so the body can catch up or it will continue on ahead with the result the ball is thrown before energy transfer fully commences. No matter which way it happens, the result is a loss of speed.
The challenge here, of course, is explaining it to a pitcher in a way that makes sense. One way I do that is to tell her that the train (her body) doesn’t wait for the passenger (her arm or the ball), so she needs to get the train moving as her arm swings back and the passenger then has to make sure it jumps on the moving train. Like this:
What about a pitcher who doesn’t use a backswing? The concept still works.
If she comes out of the glove on her side, she’ll need to get her body moving forward before her hands start moving. If she drops out of the glove she’ll again need to do it after she’s started moving forward.
No matter which method she uses the key is to get her drive and momentum developing – her center of gravity moving forward, out ahead of the pitching rubber – before she starts into the arm circle. That way the whole body is moving together, in harmony, giving her the ability to deliver the pitch with maximum force.
If you have a pitcher who is struggling with the timing of her arm relative to her body, give this explanation a try. Train whistle sounds optional.