I’ve never met Monica Abbott’s trainer but this dude gets 2 thumbs up from me for his creativity and forward-thinking.
As you can see on the video, he has Monica pitching while kneeling on a stability ball during her workouts. This type of softball conditioning forces her to learn how to use her core muscles to stabilize while pitching. This is very softball-specific (or pitching-specific) core training.
I definitely approve this and even strongly recommended to all young pitchers. However, kneeling on a ball isn’t that easy. Here’s the progression to follow before you get to actually pitch kneeling on the ball:
Step 1 – Learn how to kneel on the ball (that will take some time)
Step 2 – Learn how to remain balanced and in control while kneeling
Step 3 – Exchange a few chest passes with a simple basketball with a partner while kneeling on the ball
Step 4 – Micmic the softball pitching motion without actually throwing the ball and practice remaining stable
Step 5 – Model Monica and pitch from the ball with a real ball.
Be patient, all this may take you a few weeks to master.