https://www.youtube.com/watch?v=hokqRs9GbrI&feature=share
Interesting 20-minute video featuring (among others) Dr. Sue Dyson about engaging the core and raising the back.:
[i]"It’s not a new method, the classical masters years ago, before us, knew this, and we’ve lost that along the way.
Our eyes are being trained to seeing horses inverted and disconnected and it’s slowly infiltrating what everybody’s vision is of a correctly moving horse, so we need to counteract that and really point out the damages that we’re doing to horses by this incorrect riding."[/i]
…
Dr. Dyson:
“I think that those riders and trainers are lacking in ability to recognize lameness, and to recognize behavioral signs that indicate an underlying pain-related problem, and that those people really need education to improve recognition of pain and behavioral changes related to pain.”