Whenever a hitter goes through the process of learning to hit with me, I do my best to instill in them the concept of a "fall back swing." I got the idea from Scott Sarginson. During the process, the hitter and the coach need to create a dialogue. For my child, she knows what is "basic" for her to fall back to. For her, it includes no stride, bat on her shoulder w/elbow parallel to the ground, a load of he core by bringing her front knee back toward her back knee and ... So, whenever she feels like she is getting out of sync or struggling, she goes to this basic setup and does swings off of a tee. Then, she does some front toss work in the same manner. From there, she adds other elements back into the swing like lifting her bat off of her shoulder and tipping and ripping. She adds back a stride. In short, physician, heal thyself. Most of the time if a hitter has had success, the problem becomes more mental than physical. In this way, they work their way through the swing.