I spent a considerable amount of time last night viewing my daughters videos in slow motion. I see three things I want to work on right off the bat )(pardon the pun).
1st of all, she is lifting her front foot and setting it right back down with an almost straightish leg and a flat foot when she starts her swing.
2nd, she isn't loading up good, getting that negative movement. (probably why you all say to lose the towel).
3rd, she is pushing her front hip out of the way and back. I think I can work on the 1st two, but how do I correct the last point? I need to man up and just quit letting her do live swings and start working from the ground up and fix what I can I think. She will hate me for it, but she has too many swing flaws to just try and use constraints to correct while she swings at balls off a Tee.
I work with a lot of LD kids and in their world see it, feel it and fix it is huge. The water shifting in the bottle has really helped us out. Take a half full have half empty bottle your choice, and place it horizontally in the palm of your hand and show her the water moving and that you can control that movement. Then have her put her hand under yours so she can feel it herself. Now point to her hips and say we want you to feel that movement here in your hips. I have them load and get to toe touch with their lead foot shoe off and show them we want them on the inside edge of the foot enough so the baby toe can be moved and that is called eversion. Make sure the lead leg knee is bent or flexed and them gently slap her lead leg thigh and she will feel t wiggle like jello on a plate. Explain this is why the water moves and how we shift our weight. Then have her straighten out her knee and slap her thigh again and it will be very rigid and the water will not move and her weight can not shift forward or be linear.
Thanks Howard