I taught mine the Clinton Anderson way, and with the way he teaches it if youpull the one rein low and back toward your knee, you dont even have to pull the horses head to the knee, the horse does it himself, slowing, because he has been trained when you hand goes to your knee he is to touch his side with his nose, stopping himself. But it starts with them just barely giving, release, giving more, release, ON THE GROUND, then under saddle etc.
In the video where he teaches this the first thing he says is a one rein stop is something you should start teaching your horse from the ground... A lot of his methods he starts from the ground. Or maybe all of it... in one video he says people will bring him a bad horse to train and call him in a couple of weeks and say "well? Did it throw you yet?" and he says "no, cause I haven't gotten on him yet", the point being its groundwork, and a lot of it, that keeps you being safe when you get in the saddle. With every guru you have to take what you need and leave the rest, and I am a believer in his one rein stops and his flexing for softness. I like those two things a lot and it has come in handy with my horses. Janice -- yipie tie yie yo
