a lot of people who have never been a young girl pitching
Trigger the arm whip with the body and legs.
Amen to the last post. I think if you do all this arm whip hoopla, you will mess up the girls.
Considering most of the speed comes from the speed of the arm rotation, whip and internal wrist rotation at release, how can you ignore it? The legs are obviously important but only a part of the equation. I always gun my DD standing to see what she generates without her legs. She's 14 and has gone from 46 to 49 in the past few months just standing still. That's from working on arm whip and making sure she feels she's using her core and the lat muscles. She siad last night they were sore (not injured sore but actualy being used sore).